Health hazards
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Health hazards

Health Hazards

Health hazards

This material was produced under grant number SH-22248-11-61-F-54 from the Occupational Safety and Health Administration, U.S. Department of Labor. It does not necessarily reflect the views or policies of the U.S. Department of Labor, nor does mention of trade names, commercial products, or organizations imply endorsement by the U.S. Government.



  • After this module you should be able to

    • identify the most common health hazards

    • take the necessary steps to avoid and control those hazards

Purpose of osha s hazard communication standard

Purpose of OSHA’s Hazard Communication Standard

To ensure that employers and employees know about work hazards and how to protect themselves so that the incidence of illnesses and injuries due to hazardous chemicals is reduced.

Hazard Communication




Material Safety

Data Sheet




Employer responsibilities

Identify and list hazardous chemicals in their workplaces

Obtain Material Safety Data Sheets (MSDSs) and labels for each hazardous chemical, if not provided by the manufacturer, importer, or distributor

Implement a written HazCom program, including labels, MSDSs, and employee training

Communicate hazard information to employees through labels, MSDSs, and formal training programs

Employer Responsibilities

Nfpa label

National Fire Protection Association

The higher the number (max is 4), the greater the hazard. Check the MSDS.

NFPA Label

Material safety data sheets

Must be in English and include information regarding the specific chemical identity and common names

Must be readily accessible to employees in their work area

Prepared by the chemical manufacturer or importer and describe:

Physical hazards, such as fire and explosion

Health hazards, such as signs of exposure

Routes of exposure

Precautions for safe handling and use

Emergency and first-aid procedures

Control measures

Identification (name, address, and telephone number) of the organization responsible for preparing the sheet

Material Safety Data Sheets

Applying pesticides

Applying Pesticides

Read the chemical label and MSDS to know what precautions to take when using the chemical.

Use PPE recommended by chemical manufacturer.

Launder clothing after handling pesticides.

Wash exposed body parts often to reduce dermal exposure.

Warning silica exposure from cutting concrete

Warning: Silica Exposure from Cutting Concrete

Use a substitute for silica

Use engineering controls to reduce exposure

Improve work practices

Use personal protective equipment

Dust and mold exposure

Dust and Mold Exposure

Identify possible dust and mold at the work site and limit exposure

Move work outside whenever possible

Ventilate dusty areas

Use mechanical controls to remove dust and mold from the air

Wear a particulate respirator or dust mask as a last resort

Preventing heat related illness

Know signs/symptoms of heat-related illnesses.

Block out direct sun or other heat sources.

Use cooling fans/air-conditioning.

Drink lots of water; about 1 cup every 15 minutes.

Wear lightweight, light colored, loose-fitting clothes.

Avoid alcohol, caffeinated drinks, or heavy meals.

Rest periodically in a cool area.

Preventing Heat Related Illness

Activity msds sheet exercise

Activity: MSDS Sheet Exercise

  • Distribution of MSDS Sheet.

  • Distribution and explanation of exercise.

  • Small group activity.

  • Report back.

Check your knowledge

Check Your Knowledge

  • OSHA’s regulation on hazard communication says that:

    • Only certain chemicals can be used.

    • Only chemicals that are used in large quantities need to be evaluated for their hazards.

    • All chemicals must be evaluated for their hazards, and all information relating to these hazards must be made available to workers.

    • Only chemical engineers can be allowed to handle large quantities of chemicals.

Check your knowledge1

Check Your Knowledge

2. Where can you look to find the hazards of a particular chemical?

  • NFPA label

  • Material Safety Data Sheets

  • Chemical label

  • All of the above

Check your knowledge2

Check Your Knowledge

3. What is the recommended water intake to help prevent heat related illness?

  • 1 cup every hour.

  • 1 cup every 15 minutes.

  • 1 cup before lunch and another after.

  • 1 cup every 5 minutes.

Additional information

Additional Information

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