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Sensitizer

Definition

• A sensitizer is defined by OSHA as "a chemical that causes a substantial proportion of exposed people or animals to develop an allergic reaction in normal tissue after repeated exposure to the chemical."

  The condition of being sensitized to a chemical is also called chemical hypersensitivity.

Additional Info

Certain chemicals have no immediate health effect. But if you are exposed to them several times, they can make you allergic or sensitive to other chemicals. A classic example is formaldehyde (CH₂O). Typical reactions to sensitizers can include skin disorders such as eczema.

MSDS Relevance When working with sensitizers, always use personal protective equipment such as gloves or even a respirators. Using a fume hood or other workplace control is a very good idea as well. Once you are sensitized to a particular chemical, even minute amounts will cause symptoms. Sensitization is usually a life-long effect. Further Reading OSHA standard 1910.1048, Formaldehyde. ExtoxNet FAQ on chemical hypersensitivity. Latex glove allergies discussed at immune.com. The Health and Safety Authority of Ireland has some two fact sheets titled An Employers' and Employee's Guide to Occupational Asthma. See also: asthma

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Disclaimer: The information contained herein is believed to be true and accurate, however ILPI makes no guarantees concerning the veracity of any statement. Use of any information on this page is at the reader's own risk. ILPI strongly encourages the reader to consult the appropriate local, state and federal agencies concerning the matters discussed herein.