Code of Massachusetts Regulations
105 CMR - DEPARTMENT OF PUBLIC HEALTH
Title 105 CMR 650.000 - Hazardous Substances
Section 650.010 - Hazardous Mixtures

For a mixture of substances, the determination of whether the mixture is a "hazardous substance" should be based on the physical, chemical, and pharmacological characteristics of the mixture. A mixture of substances may therefore be less hazardous or more hazardous than its components because of synergistic or antagonistic reactions. It may not be possible to reach a fully satisfactory decision concerning the toxic, irritant, corrosive, flammable, sensitizing, or pressure-generating properties or a substance from what is known about its components or ingredients. The mixture itself should be tested.