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Hazard Communication. 4. 2. 3. Employee “Right-to-Know” Law 29 CFR 1926.59. W. Standard Highlights. Differentiates Between Federal & State Hazard Determination Written Program Labels / Other Forms of Warnings MSDS Employee Information & Training Emergency & Non-Emergency Situations.

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hazard communication

Hazard Communication




Employee “Right-to-Know” Law

29 CFR 1926.59


standard highlights
Standard Highlights
  • Differentiates Between Federal & State
  • Hazard Determination
  • Written Program
  • Labels / Other Forms of Warnings
  • MSDS
  • Employee Information & Training
  • Emergency & Non-Emergency Situations
haz com standard

Approximately 1:4 workers are exposed to one or more of over 8,000 hazardous chemicals

23% of total US population may have been exposed to one or more hazardous chemicals


To present information and training to employees exposed to hazardous substances

Haz-Com Standard
haz com standard1
Haz-Com Standard

OSHA Promulgated Interim Rule: 1983

    • Compliance 5/86
    • Manufacturing Codes 21-39 Only

OSHA Promulgated Interim Rule: 8/20/87

    • Compliance 9/20/87
    • Chemical Mfg..., importers, distributors to ensure MSDS’s provided with next shipment
  • Compliance 5/23/88
haz com standard2





Compressed Gas



Haz-Com Standard

Difference Between Federal & State Standards

MSDS = Basis for determining whether a

chemical is hazardous

Characteristics of a chemical to pose physical hazards:


The Hazard Communication Standard Requires:

  • Written Haz-Com Program
  • Hazard Determination, Chemical Inventory
  • Material Safety Data Sheets


written program
Written Program
  • Training In:

1. Health Hazards

2. Evaluating Hazards

3. Use of MSDS’s

4. Emergency Procedures


Written Communication Program

  • Program for container labeling and other forms of hazard warning
  • Material Safety Data Sheet (MSDS) availability
  • Employee Training / Information Program
  • List of hazardous substances in the workplace
  • Inform employees of the hazards of non-routine tasks
  • Procedure for informing contractors & employees of the hazards associated with work in a facility

Hazard Determination

  • Operations / Processes
  • Categories / Definitions
  • Physical / Health Hazards
  • Methods of Detection
  • Methods of Control / Protection
Physical Hazards





Health Hazards






Systemic Poisons



Hazardous Chemical Categories

chemical inventory
Chemical Name

Supplier name & address

MSDS available

Chemical HMIS

Container type & size

Quantity of chemical

Storage location

Operation / Process

Number of employees exposed

Chemical Inventory

Identify all Jobs and Processes Requiring the Use of

Hazardous Chemicals and List Those Chemicals

material safety data sheets
Material Safety Data Sheets

The employer must maintain copies of the required MSDS’s for each hazardous chemical used or produced in the work place and shall ensure that they are readily accessible during each work shift when employees are present

major msds headings
Chemical Identification

Physical/Chemical Characteristics

Hazardous Ingredients

Fire and Explosion Hazard Data

Reactivity Data

Health Hazard Data

Spill, Leak, Disposal Information

Special Protection

Special Handling, Storage, Packaging

Transportation Data

Major MSDS Headings
material safety data sheets1
Material Safety Data Sheets
  • Physical & Chemical Properties
    • Understanding the way chemicals behave can help haz-mat teams anticipate hazards a substance may create during an emergency
  • Boiling Point: Temperature at which a liquid changes to gas
  • Example: Water boils at 212°F
    • Importance: It determines whether a substance will be a liquid or gas at ambient temperature
material safety data sheets2
Material Safety Data Sheets

Physical & Chemical Properties

  • Corrosivity: A compound which can quickly damage skin, metal, or other solids

Example: If strong acids or bases are stored in metal containers, they will rapidly eat through the container

Importance: Corrosives can harm skin, lungs, eyes, mouth and stomach

material safety data sheets3
Material Safety Data Sheets

Physical & Chemical Properties

  • Solubility: The measure of how readily a chemical dissolves in water

Example: Alcohol readily mixes with water, but motor oil does not

Importance: If a liquid spill into a waterway and is not soluble, it will either float or sink

material safety data sheets4
Material Safety Data Sheets

Physical & Chemical Properties

  • Viscosity: Having relatively high resistance to flow. Temperature effects viscosity

Example: Water has a low viscosity, while heavy crude oil has a much greater viscosity

Importance: Since viscosity changes with temperature, highly viscous materials may become runny at higher temperatures and spread rapidly

material safety data sheets5
Material Safety Data Sheets

Physical & Chemical Properties

  • Specific Gravity: Ratio of density of a substance to the density of a reference substance, usually water, Specific Gravity=1

Example: Xylene has SG of 0.86 and will float on water, while FREON 113 has SG of 1.57

Importance: Chemicals that sink in waterways are difficult to clean up and/or detect

material safety data sheets6
Material Safety Data Sheets

Physical & Chemical Properties

  • Vapor Pressure: The pressure characteristic at any given temperature of a vapor in equilibrium with its liquid or solid form, often expressed in “mm/hg”

Example: Vapor pressure of acetone is 400mm; that of Xylene is 6.72. The higher the number the faster it will evaporate

Importance: Materials with high VP can create toxic atmospheres within work areas

material safety data sheets7
Material Safety Data Sheets

Physical & Chemical Properties

  • Volatility: This refers to how readily a liquid will vaporize or evaporate

Example: Gasoline is a volatile liquid

Importance: Volatile liquid can give off vapors which may be toxic, explosive and/or asphyxiant

material safety data sheets8
Material Safety Data Sheets

Physical & Chemical Properties

  • Vapor Density: Relative weight of gas or vapor as compared to air which has a vapor density of 1

Example: Methane gas has a vapor density of 0.6, and will rise, while FREON 113 has vapor density of 1.6

Importance: Vapors / gases may be toxic, explosive and / or asphyxiant

material safety data sheets9
Material Safety Data Sheets

Physical & Chemical Properties

  • Flammability: The ease in which a material (gas, liquid or solid) will ignite

Example: Gasoline and acryolnitrile are flammable liquids, while propane is a flammable gas

Importance: The flammability of a substance is important to know to determine potential for a fire

material safety data sheets10
Material Safety Data Sheets

Physical & Chemical Properties

  • Flash Point: Minimum temperatures at which a liquid or volatile solid will produce gases/vapors to form ignitable mixture

Example: Material Flash Point Fire Hazard

Gasoline -45°F HIGH

Acetone 0°F

MEK 24°F

Turpentine 95°F

Diesel Fuel 110°F LOW

material safety data sheets physical chemical properties explosive limits
Material Safety Data SheetsPhysical & Chemical PropertiesExplosive Limits
  • Lower Explosive Limit ( LEL )
    • The minimum concentration of a substance in the air which is required for ignition. Concentrations below the LEL will not ignite and are “lean”
  • Upper Explosive Limit ( UEL )
    • The maximum concentration of a substance in the air which is required for ignition. Concentrations above the UEL will not ignite and are “rich”
physical chemical properties chemistry of fire
Physical & Chemical PropertiesChemistry of Fire
  • The symbol demonstrates that fire needs 3 things to burn
    • Fuel (combustibles)
    • Oxygen (oxidizers)
    • Ignition source


Ignition Source


the haz com standard requires
The Haz-Com Standard Requires









labels warnings
Labels / Warnings
  • MSDS must have:

1. Identity of Substance

2. Hazard Warnings

3. Name/Address of Mfg..

4. CAS # (some states require)

haz com standard3
Haz-Com Standard
  • MSDS:

Based on hazard determination, employers are required to retain MSDS on each hazardous substance

1. May develop their own

2. Obtain from manufacturer

haz com standard4
Haz-Com Standard
  • Information / Training:

1. Establishes written program

2. Enforces info presented on labels and MSDS

3. Used to minimize exposure

4. Provided at initial assignment

employee training requirements
Employee Training Requirements
  • Provide information and training to employees working in areas with potential exposure to hazardous chemicals
  • Employees trained to be able to recall fundamental health and physical hazards associated with specific chemicals
employee training requirements1
Employee Training Requirements
  • Employees must be informed of the hazards associated with performing non-routine tasks
    • Specific health and physical hazards
    • Protective measures to be utilized
    • Hazard control methods
  • Non-routine tasks, such as tank / pit cleaning, welding or other maintenance tasks
subcontractor operations
Subcontractor Operations
  • Establish and define hazard communication program requirements for contractors or vendors performing work on the premises
  • Provide contractors with list of hazardous materials used in affected work area(s)
  • Contractors must inform plant operation managers of any hazardous materials scheduled for arrival. Provide MSDS’s
emergency non emergency situations
Emergency / Non-EmergencySituations
  • Disclosure of chemical identity only in emergency situations (i.e. treating physician)
  • Disclosure in non-emergency situations only when health professional explains why info is essential to providing occupational health services
haz com


  • It is required by OSHA that every worker be informed of the chemical hazards to which they are, or may potentially be exposed
  • Workers shall be knowledgeable and able to readily identify, evaluate, and protect themselves from hazardous chemical exposure