Skip to content
All safety questions
Asked by a personUnited Statesen-US

Write a risk assessment for Determination of Molar Mass of Cyclohexane Using modified Dumas Method (Hotplate instead of waterbacth)

A person submitted this question to Rosie's free generator. The asker's identity is neither imported nor published.

Rosie's answer

Published by SALUS

A suitable risk assessment for determining the molar mass of cyclohexane by the modified Dumas method on a hotplate should classify the task as a flammable solvent heating operation with elevated vapor pressure and fragile glassware. Cyclohexane is a Category 2 flammable liquid with a flash point of -18 °C, boiling point about 81 °C, vapor pressure 104 mbar at 20 °C, and flammable limits of 1\.3 to 8\.0 vol %, so even room-temperature vapor can ignite if it reaches an ignition source. Heating it on a hotplate increases evaporation and internal vapor pressure, which can eject hot liquid or rupture inadequately vented glassware. The laboratory should therefore complete a task-specific assessment before work, identifying the chemical, quantities, heating conditions, worst-case outcomes, and controls under the hierarchy of controls. [2] [1] [6]

Main hazards to document:

  • Fire and flashback from cyclohexane vapor contacting hot surfaces, sparks, switches, or static discharge
  • Pressure buildup in the Dumas vessel if the capillary/vent is blocked, too small, or submerged in liquid, with possible bursting or ejection of hot vapor
  • Hotplate ignition risk if the plate or its controls are not suitable for flammable vapor service
  • Glass breakage from thermal shock, poor-quality glass, over-tight clamping, or pressure stress
  • Inhalation exposure to vapor causing dizziness, drowsiness, headache, nausea, or CNS effects
  • Skin and eye irritation from splashes or condensate
  • Aspiration hazard if swallowed
  • Environmental hazard from release to drains or the environment

[5] [3] [2] [3] Because this version uses a hotplate instead of a water bath, the ignition risk is higher and the method should only be run if the hotplate arrangement has been specifically reviewed and approved by the laboratory. A water bath normally limits temperature and separates the solvent vessel from a direct heated surface; a hotplate can create hotter local surfaces and a nearby electrical ignition source. The safest arrangement is to perform the experiment at the smallest practicable scale, entirely inside a functioning fume hood, with no open flames, no spark sources, and with the hotplate positioned so vapors are captured by hood airflow. If the laboratory cannot provide a low-ignition-risk setup, the experiment should be redesigned back to a water bath or another lower-hazard heating method. [1] [3] [7]

Required control measures:

  • Carry out the procedure in a certified chemical fume hood with sash kept as low as practicable
  • Use the minimum volume of cyclohexane needed for the determination
  • Keep all ignition sources away; no flames, no hot-air guns, no sparking devices, no switching nearby during vapor release
  • Use only a hotplate that the institution has approved for flammable-solvent work; avoid damaged or non-laboratory electrical equipment
  • Use a stable support so the flask cannot tip; clamp lightly and never over-constrain hot glass
  • Use only clean, dry, defect-free borosilicate glassware; inspect for chips, scratches, star cracks, and stressed joints before use
  • Ensure the Dumas vessel is vented exactly as required by the method; never heat a sealed system
  • Heat gradually and do not exceed the minimum temperature needed to vaporize the cyclohexane
  • Keep face and body out of the line of possible ejection; use the hood sash as a barrier
  • Do not work alone; use trained personnel and a written SOP
  • Keep spill absorbent, eyewash, safety shower, and an appropriate extinguisher immediately available

[4] [6] [7] PPE:

  • Chemical splash goggles as the minimum eye protection for this task; a face shield may be added over goggles if the institution requires extra splash or pressure protection
  • Lab coat, long pants, and closed-toe shoes
  • Chemical-resistant gloves selected for cyclohexane handling and changed if contaminated
  • Heat-resistant gloves only for handling hot glassware, and only if they do not compromise grip or dexterity
  • Respiratory protection is not routine if the work is done in a functioning hood, but an organic-vapor respirator may be required under the site respiratory protection program if ventilation is inadequate or during emergency response

[7] [4] [9] For inhalation exposure control, the primary requirement is effective local exhaust ventilation. Cyclohexane vapor is readily generated and may cause drowsiness or dizziness; symptoms of overexposure can include headache, dizziness, tiredness, nausea, vomiting, and breathing difficulty. Exposure should be kept well below occupational limits, and the SDS lists an ACGIH TWA of 100 ppm and OSHA/NIOSH TWA values of 300 ppm. In practice for this experiment, do not rely on odor as a warning, keep containers closed except during transfer, and allow the apparatus to cool in the hood before dismantling so residual vapor is captured. [3] [5] [4] [7]

Safe operating procedure:

  1. Review the SDS, local SOP, and task-specific risk assessment. Confirm training, emergency contacts, hood availability, spill kit, eyewash, shower, and extinguisher location.
  2. Inspect the hotplate, cords, clamps, and glassware. Do not use chipped, scratched, or stressed glass. Confirm the vessel is designed to remain vented during heating.
  3. Set up the apparatus inside the fume hood on a stable surface. Keep the sash low enough to act as a shield while allowing manipulation.
  4. Bring only the minimum cyclohexane quantity to the hood. Keep the stock bottle closed when not dispensing.
  5. Charge the Dumas vessel with the minimum required amount of cyclohexane, avoiding contamination of the outside of the glass. Wipe any drips immediately.
  6. Ensure the vent/capillary is open and unobstructed. Never point the opening toward yourself or others.
  7. Start with the lowest practical hotplate setting and increase gradually only as needed. Do not leave the experiment unattended while heating.
  8. Observe from behind the sash for steady vaporization. If bumping, violent boiling, blockage, or abnormal pressure behavior is suspected, stop heating immediately and allow the apparatus to cool in the hood.
  9. After completion, switch off the hotplate, leave the apparatus in the hood until cool, then dismantle carefully using appropriate hand protection for hot glass.
  10. Transfer all cyclohexane residues, rinses, and contaminated absorbents to labeled hazardous waste containers. Decontaminate the area and wash hands after removing gloves.

[6] [4] [3] Emergency response:

  • If fire occurs: raise the alarm, evacuate as required by site procedure, and use CO2, dry chemical, dry sand, or foam only if the fire is small and you are trained. Do not use a water jet to spread burning solvent. Cool exposed containers with water mist from a safe distance if appropriate.
  • If a spill occurs: remove ignition sources, increase ventilation, use spark-proof tools, absorb with inert material, and place waste in a suitable closed container. Prevent entry to drains and waterways.
  • If inhaled: move the person to fresh air and keep them at rest. Seek medical attention if symptoms occur or if breathing is difficult.
  • If on skin or hair: remove contaminated clothing and rinse skin thoroughly with water, then wash with soap and water. Get medical advice for persistent irritation.
  • If in eyes: rinse cautiously with water for at least 15 minutes and obtain medical attention.
  • If swallowed: call a poison center or physician immediately and do not induce vomiting because of aspiration hazard.
  • If glass breaks while hot or contaminated: isolate the area, allow hot fragments to cool if safe, use tools or a brush and pan rather than hands, and dispose of broken contaminated glass as hazardous sharps according to local procedure.

[5] [5] [4] [3] Waste disposal should treat cyclohexane and all contaminated materials as flammable hazardous chemical waste. Collect liquid residues, rinses, contaminated pipettes, wipes, and absorbents in compatible, closed, clearly labeled waste containers stored in the flammables/waste area. Do not pour cyclohexane to drain, do not allow evaporation as a disposal method, and do not release spills to the environment. Broken glass contaminated with cyclohexane should go into the designated contaminated sharps or broken-glass waste stream used by the institution. [3] [5] [7]

For COSHH or laboratory regulatory compliance, the documentation package should include: a written task-specific risk assessment; the current cyclohexane SDS; a written SOP for the modified Dumas method using a hotplate; a PPE hazard assessment; evidence that engineering controls such as the fume hood are available and functioning; training and supervision records; emergency arrangements; and waste management arrangements. Under laboratory chemical hygiene principles, the assessment must identify chemicals, quantities, conditions of use, hazards, and controls before work starts, and PPE should be selected only after engineering and work-practice controls are considered. For UK-style COSHH compliance specifically, this translates into assessing exposure, preventing or adequately controlling exposure, maintaining controls, providing information/instruction/training, planning emergencies, and documenting review when the method changes. Because replacing a water bath with a hotplate changes both ignition and thermal hazards, the assessment should be formally reviewed and reapproved before use. [6] [6] [10] [8]

10 source record(s)

Sources used for this answer

[1] Safety Data Sheet - Cyclohexane

Page 2

Open source document

Source excerpt

# Cyclohexane Revision Date 25-Mar-2024 Causes skin irritation Causes eye irritation May cause drowsiness or dizziness ## Precautionary Statements Prevention <table><tr><th>Wash face, hands and any exposed skin thoroughly after handling</th></tr><tr><td>Wear protective gloves/protective clothing/eye protection/face protection</td></tr><tr><td>Do not breathe dust/fume/gas/mist/vapors/spray</td></tr><tr><td>Use only outdoors or in a well-ventilated area</td></tr><tr><td>Keep away from heat/sparks/open flames/hot surfaces. - No smoking</td></tr><tr><td>Keep container tightly closed</td></tr><tr><td>Ground/bond container and receiving equipment</td></tr><tr><td>Use explosion-proof electrical/ventilating/lighting equipment</td></tr><tr><td>Use only non-sparking tools</td></tr><tr><td>Take precautionary measures against static discharge Keep cool</td></tr><tr><td>Response</td></tr><tr><td>Get medical attention/advice if you feel unwell Inhalation</td></tr><tr><td>IF INHALED: Remove victim to fresh air and keep at rest in a position comfortable for breathing Call a POISON CENTER or doctor/physician if you feel unwell Skin</td></tr><tr><td>If skin irritation occurs: Get medical advice/attention</td></tr><tr><td>IF ON SKIN (or hair): Take off immediately all contaminated clothing. Rinse skin with water/shower Wash contaminated clothing before reuse</td></tr><tr><td>Eyes</td></tr><tr><td>IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing If eye irritation persists: Get medical advice/attention Ingestion</td></tr><tr><td>IF SWALLOWED: Immediately call a POISON CENTER or doctor/physician Do NOT induce vomiting</td></tr><tr><td>Fire</td></tr><tr><td>In case of fire: Use CO2, dry chemical, or foam for extinction Storage</td></tr><tr><td>Store locked up</td></tr><tr><td>Store in a well-ventilated place. Keep container tightly closed Disposal</td></tr><tr><td>Dispose of contents/container to an appro…

[2] Safety Data Sheet - Cyclohexane

Page 1

Open source document

Source excerpt

Thermo Fisher SCIENTIFIC # SAFETY DATA SHEET Creation Date 06-Oct-2009 Revision Date 25-Mar-2024 Revision Number 2 ## 1. Identification <table><tr><th>Product Name</th><th>Cyclohexane</th></tr><tr><td>Cat No. :</td><td>C32683</td></tr><tr><td>CAS No</td><td>110-82-7</td></tr><tr><td>Synonyms</td><td>Hexahydrobenzene; Benzene hexahydride; Hexamethylene.</td></tr><tr><td>Recommended Use</td><td>Laboratory chemicals.</td></tr><tr><td>Uses advised against</td><td>Food, drug, pesticide or biocidal product use.</td></tr></table> ## Details of the supplier of the safety data sheet Company Thermo Fisher Scientific Chemicals, Inc. [redacted street address] Ward Hill, MA [redacted identifier] Tel: [redacted phone] Fax: [redacted phone] Emergency Telephone Number For information US call: [redacted identifier]-6701 / Europe call: +32 14 57 52 11 Emergency Number US:[redacted identifier]-7100 / Europe: +32 14 57 52 99 CHEMTREC Tel. No. US:[redacted identifier]-9300 / Europe:[redacted identifier]-3887 ## 2. Hazard(s) identification ## Classification This chemical is considered hazardous by the 2012 OSHA Hazard Communication Standard (29 CFR 1910.1200) <table><tr><th>Flammable liquids</th><th>Category 2</th></tr><tr><td>Skin Corrosion/Irritation</td><td>Category 2</td></tr><tr><td>Serious Eye Damage/Eye Irritation</td><td>Category 2</td></tr><tr><td>Specific target organ toxicity (single exposure)</td><td>Category 3</td></tr><tr><td>Target Organs - Central nervous system (CNS).</td><td></td></tr><tr><td>Aspiration Toxicity</td><td>Category 1</td></tr></table> ## Label Elements Signal Word Danger Hazard Statements Highly flammable liquid and vapor May be fatal if swallowed and enters airways Page 1/9

[3] Occupational Safety and Health Standards (OSHA 29 CFR 1910) - 1910.1450 App A - National Research Council Recommendations Concerning Chemical Hygiene in Laboratories (Non-Mandatory)

Page 5

Open source document

Source excerpt

# Occupational Safety and Health Administration (cont.) ## A. General Principles (cont.) - Chemical splash goggles are more appropriate than regular safety glasses to protect against hazards such as projectiles, as well as when working with glassware under reduced or elevated pressures (e.g., sealed tube reactions), when handling potentially explosive compounds (particularly during distillations), and when using glassware in high- temperature operations. Do not allow laboratory chemicals to come in contact with skin. Select gloves carefully to ensure that they are impervious to the chemicals being used and are of correct thickness to allow reasonable dexterity while also ensuring adequate barrier protection. Lab coats and gloves should be worn when working with hazardous materials in a laboratory. Wear closed-toe shoes and long pants or other clothing that covers the legs when in a laboratory where hazardous chemicals are used. Additional protective clothing should be used when there is significant potential for skin-contact exposure to chemicals. The protective characteristics of this clothing must be matched to the hazard. Never wear gloves or laboratory coats outside the laboratory or into areas where food is stored and consumed. 4. Provide Laboratory Ventilation The best way to prevent exposure to airborne substances is to prevent their escape into the working atmosphere by the use of hoods and other ventilation devices. To determine the best choice for laboratory ventilation using engineering controls for personal protection, employers are referred to Table 9.3 of the 2011 edition of "Prudent Practices." Laboratory chemical hoods are the most important components used to protect laboratory personnel from exposure to hazardous chemicals. a. (a) Toxic or corrosive chemicals that require vented storage should be stored in vented cabinets instead of in a chemical hood. b. (b) Chemical waste should not be disposed of by evaporation in a chemical hood. C. (…

[4] Safety Data Sheet - Cyclohexane

Page 4

Open source document

Source excerpt

# Cyclohexane (cont.) ## Protective Equipment and Precautions for Firefighters (cont.) Cyclohexane Revision Date 25-Mar-2024 Methods for Containment and Clean Remove all sources of ignition. Soak up with inert absorbent material. Keep in suitable, Up closed containers for disposal. Use spark-proof tools and explosion-proof equipment. Take precautionary measures against static discharges. <table><tr><th colspan="2">7. Handling and storage</th></tr><tr><td>Handling</td><td>Wear personal protective equipment/face protection. Ensure adequate ventilation. Do not breathe mist/vapors/spray. Avoid contact with skin, eyes or clothing. Keep away from open flames, hot surfaces and sources of ignition. Use only non-sparking tools. Use spark-proof tools and explosion-proof equipment. Take precautionary measures against static discharges.</td></tr><tr><td>Storage.</td><td>Keep containers tightly closed in a dry, cool and well-ventilated place. Keep away from heat, sparks and flame. Flammables area. Incompatible Materials. Strong oxidizing agents.</td></tr></table> ## 8. Exposure controls I personal protection ## Exposure Guidelines <table><tr><th>Component</th><th>ACGIH TLV</th><th>OSHA PEL</th><th>NIOSH</th><th>Mexico OEL (TWA)</th></tr><tr><td>Cyclohexane</td><td>TWA: 100 ppm</td><td>(Vacated) TWA: 300 ppm (Vacated) TWA: 1050 mg/m3 TWA: 300 ppm TWA: 1050 mg/m3</td><td>IDLH: 1300 ppm TWA: 300 ppm TWA: 1050 mg/m3</td><td>TWA: 100 ppm</td></tr></table> ## Legend ACGIH - American Conference of Governmental Industrial Hygienists OSHA - Occupational Safety and Health Administration NIOSH: NIOSH - National Institute for Occupational Safety and Health <table><tr><th>Engineering Measures</th><th>Ensure that eyewash stations and safety showers are close to the workstation location. Use explosion-proof electrical/ventilating/lighting equipment. Ensure adequate ventilation, especially in confined areas.</th></tr><tr><td>Personal Protective Equipment</td><td></td></tr><tr><td>Eye…

[5] Rules for the Administration of the Oregon Safe Employment Act (General Occupational Safety and Health, Division 2, OSHA Oregon)

Page 3589

Open source document

Source excerpt

# NATIONAL RESEARCH COUNCIL RECOMMENDATIONS CONCERNING CHEMICAL HYGIENE IN LABORATORIES (cont.) Z # NATIONAL RESEARCH COUNCIL RECOMMENDATIONS CONCERNING CHEMICAL HYGIENE IN LABORATORIES Oregon Administrative Rules Oregon Occupational Safety and Health Division Determine the physical and health hazards associated with chemicals before working with them. This determination may involve consulting literature references, laboratory chemical safety summaries (LCSSs), SDSs, or other reference materials. Consider how the chemicals will be processed and determine whether the changing states or forms will change the nature of the hazard. Review your plan, operating limits, chemical evaluations and detailed risk assessment with other chemists, especially those with experience with similar materials and protocols. Before working with chemicals, know your facility's policies and procedures for how to handle an accidental spill or fire. Emergency telephone numbers should be posted in a prominent area. Know the location of all safety equipment and the nearest fire alarm and telephone. ## 3. Adhere to the Hierarchy of Controls The hierarchy of controls prioritizes intervention strategies based on the premise that the best way to control a hazard is to systematically remove it from the workplace, rather than relying on employees to reduce their exposure. The types of measures that may be used to protect employees (listed from most effective to least effective) are: engineering controls, administrative controls, work practices, and PPE. Engineering controls, such as chemical hoods, physically separate the employee from the hazard. Administrative controls, such as employee scheduling, are established by management to help minimize the employees' exposure time to hazardous chemicals. Work practice controls are tasks that are performed in a designated way to minimize or eliminate hazards. Personal protective equipment and apparel are additional protection provided under special c…

[6] Safety Data Sheet - Cyclohexane

Page 3

Open source document

Source excerpt

# Cyclohexane Revision Date 25-Mar-2024 <table><tr><th>Eye Contact</th><th>Rinse immediately with plenty of water, also under the eyelids, for at least 15 minutes. Get medical attention.</th></tr><tr><td>Skin Contact</td><td>Wash off immediately with soap and plenty of water for at least 15 minutes. Get medical attention.</td></tr><tr><td>Inhalation</td><td>Remove to fresh air. If breathing is difficult, give oxygen. Do not use mouth-to-mouth method if victim ingested or inhaled the substance; give artificial respiration with the aid of a pocket mask equipped with a one-way valve or other proper respiratory medical device. Aspiration into lungs can produce severe lung damage. Get medical attention immediately if symptoms occur.</td></tr><tr><td>Ingestion</td><td>Do NOT induce vomiting. Aspiration hazard. Call a physician or poison control center immediately.</td></tr><tr><td>Most important symptoms and effects</td><td>Difficulty in breathing. Symptoms of overexposure may be headache, dizziness, tiredness, nausea and vomiting</td></tr><tr><td>Notes to Physician</td><td>Treat symptomatically</td></tr><tr><td colspan="2">5. Fire-fighting measures</td></tr><tr><td>Suitable Extinguishing Media</td><td>CO2, dry chemical, dry sand, alcohol-resistant foam. Water mist may be used to cool closed containers.</td></tr><tr><td>Unsuitable Extinguishing Media</td><td>Water may be ineffective, This material is lighter than water and insoluble in water. The fire could easily be spread by the use of water in an area where the water cannot be contained</td></tr><tr><td>Flash Point</td><td>-18 °C / -0.4 °F</td></tr><tr><td>Method</td><td>CC (closed cup)</td></tr><tr><td>Autoignition Temperature</td><td>260 °C / 500 °F</td></tr><tr><td>Explosion Limits</td><td></td></tr><tr><td>Upper</td><td>8.0 vol %</td></tr><tr><td>Lower</td><td>1.3 vol %</td></tr><tr><td>Sensitivity to Mechanical Impact</td><td>No information available</td></tr><tr><td>Sensitivity to Static Discharge</td><td>No in…

[7] Personal Protective Equipment (PPE) Hazard Assessment Tool

Page 8

Open source document

Source excerpt

# Hazard assessment worksheet: Leg protection (cont.) ## PPE required (cont.) OSHA Oregon OSHA Department of Consumer and Business Services # Hazard assessment worksheet: Hand protection Salem Central Office [redacted street address]. NE Salem, OR [redacted postal code] Phone: [redacted phone] Toll-free: [redacted phone] osha.oregon.gov Work task: Date ## Potential hazards - No hazards requiring hand protection - Harmful or hazardous temperatures - Chemicals that can be absorbed into the skin or cause burns - Energized electrical equipment - Mechanical equipment that can cause bruises, abrasions, cuts, punctures, fractures, or amputations Other hazard: ## PPE required None required - Cut resistant gloves General-purpose work gloves Chemical resistant gloves ............... Insulated gloves Heat and flame resistant gloves Latex or nitrile gloves Electrician's insulated rubber gloves Cotton, leather, or anti-vibration gloves Other PPE: 440-5871 (07/23/COM)

[8] General Industry Safety and Health Standards (MIOSHA)

Page 9

Open source document

Source excerpt

# 1910.1450 APPENDIX A NATIONAL RESEARCH COUNCIL RECOMMENDATIONS CONCERNING CHEMICAL HYGIENE IN LABORATORIES (NON-MANDATORY) (cont.) ## A. General Principles (cont.) Every laboratory should develop facility-specific policies and procedures for the highest-risk materials and procedures used in their laboratory. To identify these, consideration should be given to past accidents, process conditions, chemicals used in large volumes, and particularly hazardous chemicals. Perform Risk Assessments for Hazardous Chemicals and Procedures Prior to Laboratory Work: (a) Identify chemicals to be used, amounts required, and circumstances of use in the experiment. Consider any special employee or laboratory conditions that could create or increase a hazard. Consult sources of safety and health information and experienced scientists to ensure that those conducting the risk assessment have sufficient expertise. (b) Evaluate the hazards posed by the chemicals and the experimental conditions. The evaluation should cover toxic, physical, reactive, flammable, explosive, radiation, and biological hazards, as well as any other potential hazards posed by the chemicals. (c) For a variety of physical and chemical reasons, reaction scale-ups pose special risks, which merit additional prior review and precautions. (d) Select appropriate controls to minimize risk, including use of engineering controls, administrative controls, and personal protective equipment (PPE) to protect workers from hazards. The controls must ensure that OSHA's Permissible Exposure Limits (PELs) are not exceeded. Prepare for contingencies and be aware of the institutional procedures in the event of emergencies and accidents. - One sample approach to risk assessment is to answer these five questions: (a) What are the hazards? (b) What is the worst thing that could happen? (c) What can be done to prevent this from happening? (d) What can be done to protect from these hazards? (e) What should be …

[9] Safety Data Sheet - Cyclohexane

Page 5

Open source document

Source excerpt

# Cyclohexane Revision Date 25-Mar-2024 <table><tr><th>Boiling Point/Range</th><th>81 °C / 177.8 °F</th></tr><tr><td>Flash Point</td><td>-18 °C / -0.4 °F</td></tr><tr><td>Method -</td><td>CC (closed cup)</td></tr><tr><td>Evaporation Rate</td><td>6.1</td></tr><tr><td>Flammability (solid,gas)</td><td>Not applicable</td></tr><tr><td>Flammability or explosive limits</td><td></td></tr><tr><td>Upper</td><td>8.0 vol %</td></tr><tr><td>Lower</td><td>1.3 vol %</td></tr><tr><td>Vapor Pressure</td><td>104 mbar @ 20 °C</td></tr><tr><td>Vapor Density</td><td>2.90</td></tr><tr><td>Specific Gravity</td><td>0.770</td></tr><tr><td>Solubility</td><td>Insoluble in water</td></tr><tr><td>Partition coefficient; n-octanol/water</td><td>No data available</td></tr><tr><td>Autoignition Temperature</td><td>260 °C / 500 °F</td></tr><tr><td>Decomposition Temperature</td><td>No information available</td></tr><tr><td>Viscosity</td><td>0.94 mPa.s @ 20 °C</td></tr><tr><td>Molecular Formula</td><td>C6 H12</td></tr><tr><td>Molecular Weight</td><td>84.15</td></tr></table> ## 10. Stability and reactivity Reactive Hazard None known, based on information available - Stability Stable under normal conditions. Conditions to Avoid Incompatible products. Excess heat. Keep away from open flames, hot surfaces and sources of ignition. Incompatible Materials Strong oxidizing agents Hazardous Decomposition Products Carbon monoxide (CO), Carbon dioxide (CO2) Hazardous Polymerization Hazardous polymerization does not occur. Hazardous Reactions None under normal processing. ## 11. Toxicological information ## Acute Toxicity Product Information Component Information <table><tr><th>Component</th><th>LD50 Oral</th><th>LD50 Dermal</th><th>LC50 Inhalation</th></tr><tr><td>Cyclohexane</td><td>&gt; 5000 mg/kg ( Rat )</td><td>&gt; 2000 mg/kg ( Rabbit )</td><td>LC50 &gt; [redacted postal code] mg/m3 (Rat) 4 h</td></tr></table> Toxicologically Synergistic No information available Products Delayed and immediate …

[10] FACT SHEET: Personal Protective Equipment

Page 2

Open source document

Source excerpt

## Why use PPE? (cont.) PERSONAL PROTECTIVE EQUIPMENT # Employer responsibility Survey your workplace Conduct a hazard assessment to determine if employees need PPE. OAR [redacted phone](1) requires a written document that certifies that the workplace has been evaluated, the dates of the hazard assessment, ## Table 1 and who performed the evaluation. Hazard assessments should be re-evaluated whenever there are changes to equipment, processes, or chemicals in the workplace. See an example of a hazard assessment in Table 1, below. Another example is our PPE Hazard Assessment and Certification Form. <table><tr><th colspan="4">PPE Hazard Assessment (example)</th></tr><tr><td colspan="2">Department: Building maintenance</td><td colspan="2">Job title: Maintenance specialist</td></tr><tr><td colspan="4">Job duty location: Plant-wide</td></tr><tr><td colspan="4">Analysis performed by: Jada Robinson Date: Dec. 19, 2023</td></tr><tr><td>Activity/tools</td><td>Potential hazards</td><td>Body parts</td><td>PPE required</td></tr><tr><td>Replace glass</td><td>1,7</td><td>c, g, h</td><td>III, VII (cut resistant)</td></tr><tr><td>Remove trash</td><td>7</td><td>C</td><td>III</td></tr><tr><td>Replace light bulbs</td><td>1, 4, 7</td><td>c, h</td><td>III, VII (cloth/leather)</td></tr><tr><td>Welding</td><td>3,7,8</td><td>c, e, f, g, h</td><td>X (welding helmet/lens) IX (fume) X (welding vest) VII (welding gloves)</td></tr></table> ## Hazard key 1. Cut 2. Abrasion 3. Burn 4. Fall 5. Flying object 6. Noise 7. Flying particles 8. Inhalation 9. Slip 10. Splash 11. Other Body part key a. Head b. Face c. Eye(s) d. Ear(s) e. Respiratory f. Trunk g. Arm(s) h. Hand(s) i. Finger(s) j. Leg(s) k. Foot/feet I. Toe(s) m. Other PPE required key I. Hard hat - II. Chemical goggles - III. Safety glasses - IV. Ear plugs V. Ear muffs - VI. Body harness - VII. Gloves (list type) - VIII. Shoes/boots (list type) - IX. Respirator X. Other OSHA Oregon OSHA Departm…

Related Q&A

Keep exploring.

Human questionUS

Provide a detailed safety inspection sheet for general industry audits.

General Industry Safety and Health Compliance Checklist ======================================================= *Date:** 2025-08-06 *Inspector:** \[INSPECTOR NAME] *Location/Area:** \[LOCATION/AREA] *Department:** \[DEPARTMENT] Purpose This checklist is designed to provide a comprehensive evaluation of workplace

Read the thread
Human questionGeneral

Write a toolbox talk on Relay testing in PMCC Panel

Relay Testing Safety in PMCC Panels =================================== *Date:** 2026-02-19 *Duration:** \[DURATION] minutes *Presenter:** \[PRESENTER NAME] *Location:** \[LOCATION] Objective To ensure safe and effective relay testing within Power, Motor, and Control Center (PMCC) panels by understanding potential

Read the thread
Human questionGeneral

Workplace

Workplace Safety Regulations and Hazard Prevention ================================================== *Date:** 2026-01-08 *Duration:** \[DURATION] minutes *Presenter:** \[PRESENTER NAME] *Location:** \[LOCATION] Objective To understand and implement workplace safety regulations and hazard prevention measures to ensure

Read the thread
Human questionUS

Write a safe work procedure for Confined space entry

Confined Space Entry ==================== Document Number: \[SWP-NUMBER] Revision Date: \[DATE] Next Review Date: \[NEXT REVIEW DATE] Department: \[DEPARTMENT NAME] 1\. Scope This safe work procedure applies to planning, preparing for, and performing entry into permit-required confined spaces where workers may be

Read the thread
Human questionGeneral

Inspecting ppe

PPE Inspection Procedures ========================= *Date:** 2025-08-24 *Duration:** \[DURATION] minutes *Presenter:** \[PRESENTER NAME] *Location:** \[LOCATION] Objective The objective of this toolbox talk is to provide you with the knowledge and skills to perform effective PPE inspections, ensuring your safety and

Read the thread
Discussion thread

Add your experience.

Community answers can add practical context. They are moderated, but they are not SALUS-reviewed safety guidance.

New contributions are temporarily closed while the moderation queue is configured.

Community answers(0)

No community answers have been approved yet.

Comments on Rosie's answer(0)

No comments have been approved yet.

Ready to put operational safety to work?

Join 400K users across 150K sites already on SALUS.

Request a demo

No commitment · 30-minute personalized walkthrough