MSDS - Environmental, Health and Safety Office

Material Safety Data Sheet

It is the policy of Sam Houston State University that its employees who may be exposed to hazardous chemicals shall be informed of the exposure by the University and shall have ready access to the most current material safety data sheets (MSDS), which detail physical and health hazards and other pertinent information on those chemicals.

The MSDS gives detailed information about the hazards of specific chemicals and how to control them. The University has placed the MSDS sheets at each workplace and at the University Safety Office of Sam Houston State University.

There are different forms of MSDS sheets, but each one should contain the following information:

  • The common name and the chemical name of the material, unless this information is a trade secret.
  • The name, address, and phone number of the manufacturer, and emergency numbers you can use to get immediate information on specific chemical hazards.
  • The date the MSDS was written or last revised.
  • Any hazardous ingredients in the chemical.
  • Physical information that will help you identify the chemical.
  • Fire and explosion information.
  • Dangers from chemical reactions with this material.
  • Measures to control the chemical's hazards.
  • Information about the chemical's health hazards.
  • How to deal with spills and leaks.


Common Name:   Chlorine
CAS Number:       7782-50-5
DOT Number:       UN 1017
Date:                   January, 1989


  • Chlorine can affect you when breathed in.
  • Exposure can cause irritation of the eyes, nose and through, and also tearing, coughing and chest pain. Higher levels burn the lungs and can cause a buildup of fluid in lungs(pulmonary edema) and death.
  • Contact can severely burn the eyes and skin.
  • Repeated exposures or a single high exposure may permanently damage the lungs. It can also damage the teeth and cause a skin rash.

Chlorine is a greenish yellow gas with an irritating odor, or present in liquid solutions. It is used in making solvents, many chemicals, disinfectants, and chlorine bleach cleaners.


  • Chlorine is on the Hazardous Substance List because it is regulated by OSHA and cited by ACGIH, NIOSH, EPA, DOT, DEP and NFPA.
  • Definitions are attached


  • Exposure to hazardous substances should be routinely evaluated. This may include collecting air samples. Under OSHA 1910.20, you have a legal right to obtain copies of sampling results from you employer. If you think you are experiencing any work related health problems, see a doctor trained to recognize occupational diseases. take this Fact Sheet with you.
  • ODOR THRESHOLD = 0.31 ppm.
  • The odor threshold only serves as a warning of exposure. Not smelling it does not mean you are not being exposed.

OSHA:      The legal airborne permissible exposure limit (PEL) is 1 ppm, not to be exceeded at any time.
NIOSH:     The recommended airborne exposure limit is 0.5 ppm, which should not be exceeded during any 15 minute period.
ACGIH:     The recommended airborne exposure limit is 1 ppm averaged over an 8 hour work-shift and 3 ppm as a STEL (short term exposure limit).


  • Where possible, enclose operations and use local exhaust ventilation at the site of chemical release. If local exhaust ventilation or enclosure is not used, respirators should be worn.
  • Wear protective work clothing.
  • Wash thoroughly immediately after exposure to liquid Chlorine or Chlorine solutions.
  • Post hazard and warning information in the work area. In addition, as part of an ongoing education and training effort, communicate all information on the health and safety hazards of Chlorine to potentially exposed workers.

This Fact Sheet is a summary source of information of all potential and most sever health hazards that may result from exposure. Duration of exposure, concentration of the substance and other factors will affect your susceptibility to any of the potential effects described below.

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