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Mixtures and by-products
  • It is recommended to use the test data for the complete mixture, if available.
  • During hazard determination or hazard classification, account for any hazardous by-products.

Mixtures

Chemical manufacturers and importers evaluating chemical mixtures must follow the procedures described in Appendices A and B to 1910.1200. Under the HazCom standard, it is recommended to use the test data for the complete mixture, if available. If not, then there are other options for classifying the mixture using “bridging principles” based on ingredients and data.

By-products

Hazard determination or hazard classification must anticipate the full range of downstream uses of products and account for any hazardous by-products which may be formed. Decomposition products produced during normal conditions of use or in foreseeable emergencies for the product are covered.

For example, a manufacturer of gasoline must inform downstream users of the hazards of carbon monoxide, since carbon monoxide is a hazardous chemical and is “known to be present” as a by-product resulting from the use of gasoline.