These documents are required for specific products by United States Federal Law, 29 CFR 1910.1200. According to federal law, manufacturers and importers of chemical products must produce a MSDS for each hazardous chemical they produce or import. This law also requires U.S. employers to have a MSDS in the workplace for each chemical that they use. A MSDS explains the hazards associated with the product, as well as what precautions to take to avoid those hazards.