Mass. Gen. Laws ch. 149 § 142B
No person shall keep for sale, sell, transport or store, and no person shall have for use in any manufacturing, mechanical or mercantile establishment, or any other place of employment, any material containing benzol, carbon tetrachloride or other substance which, in the opinion of the department of labor and workforce development and the department of public health, acting jointly, is so hazardous to health as to warrant regulation, in any receptacle other than part of a vehicle used exclusively for outdoor transportation, unless such receptacle is marked with one of the following combinations of words: "Contains benzol", "Contains carbon tetrachloride" or "Contains (name of substance)", together with such warning as the director of labor and workforce development and the commissioner of public health jointly by reasonable rules and regulations may require.
Mass. Gen. Laws ch. 149, § 142B