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|Title: 11/04/1993 - Hazard evaluation of mixtures containing established mutagens.|
|Record Type: Interpretation||Standard Number: 1910.1200|
November 4, 1993
Mrs. J. L. Bunyan
Deputy Registration Manager
SafePharm Laboratories Ltd.
Post Office Box No. 45
Derby DEI 2BT
Dear Mrs. Bunyan:
This is a response to your letter of April 21, concerning the requirements under the Occupational Safety and Health Administration's (OSHA) Hazard Communication Standard (HCS), 29 CFR 1910.1200, for hazard evaluation of mixtures containing established mutagens. We will respond to your questions as they were presented in your correspondence.
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|If a hazardous chemical is present in the mixture in quantities (i.e., 0.1% for carcinogens, and 1% for other health hazards), it must be reported unless the mixture has been tested as a whole or unless the material is bound in such a way that employees cannot be exposed. If there really is no exposure (and the standard defines exposure as including potential as well as measurable exposure by any route of entry), either under normal conditions of use or in a foreseeable emergency, then the chemical is not covered by the standard, (See Paragraph (b)(2) of 29 CFR 1910.1200). Further, information must also be included on a MSDS for ingredients of a mixture present in concentrations of less than 1% (or 0.1% for carcinogens) when the hazardous substance may be released in a concentration which exceeds an OSHA Permissible Exposure Limit or an American Conference of Governmental Industrial Hygienist's Threshold Limit Value or may present a health risk to exposed employees. An example of the latter may be TDI [ILPI says: "Toluene-2,4-diisocyanate"] because it is a sensitizer in very small concentrations, thereby presenting a health risk that must be noted on the MSDS.|
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Roger A. Clark, Director
Directorate of Compliance Programs
The official, public domain, OSHA version of this document is available at http://www.osha.gov/pls/oshaweb/owadisp.show_document?p_table=INTERPRETATIONS&p_id=21315&p_text_version=FALSE