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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