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Other laws contain a list of thousands of chemicals that must be included, while a few requi re all ingredients to be listed, even those which are not hazardous. Assume that all of the chemic als that you work with should be included unless the manufacturer or employer can prove otherwise. The percentage concentration of each substance in a mixture may also be listed, but this is not required by most state laws. This is unfortunate, because it is useful to know what the other, "non-toxic" chemicals in the mixture are. What are the Names of the Chemicals? Chemicals are often known by different names: • A trade name, such as "Safety Clean", is the brand name the manufacturer gives the product. It does not tell you, however, what chemicals are in the product, or whether the product is a mixture of chemicals or a single chemical. The same chemical may be used in a variety of products with different trade names. The trade name usually appears on the label and in Section I of the MSDS_ • A generic name describes a family or group of chemicals. For example, there are several different "isocyanates", and thousands of different "chlorinated hydrocarbons". Sometimes an MSDS will try to get away with just listing the generic names. However, the law says that chemical names must also be listed. • The chemical or specific name is the one that describes the specific chemical. An example is methyl chloroform, one of the thousands of "chlorinated hydrocarbons", or toluene diisocyanate, a member of the "isocyanate" family. The chemical name is the easiest name to use when doing research on the health effects of chemicals and Trow to protect yourself. • The CAS Number is a number given by the Chemical Abstract Service to each chemical. While different chemicals may have the same name, they will all have their own CAS number which can be used to look up information. The Chemical Abstract Service publishes a book that contains a list of all CAS Numbers and the chemicals they represent. The MSDS must list the chemical name of all hazardous ingredients which make up more than 1% of the mixture (or 0.1% for cancer-causing substances). Listing only the trade name, only the CAS number or only the generic name is not acceptable. Trade Secrets The manufacturer may be able to withhold ingredient information from the MSDS if any ingredients are trade secrets. Procedures for challenging a manufacturer's trade secret claim are determined by different state laws. Under most Right -to -Know laws, the manufacturer must provide the trade secret identities to health care professionals and/or workers if they have a need to know the information, or in a medical emergency. Consult your state law for more „ r � D AUb222017 ENVIRONMENTAL HEALTH DEPARTMENT