N.C. Gen. Stat. § 66-85
It shall be unlawful for any person, firm, or corporation manufacturing household cleaners which contain volatile substances capable of producing toxic effects in or on their users when used for their intended domestic purposes to sell or offer for sale any such cleaner unless such cleaner shall be labeled with the word "caution" or other word of similar import and unless directions shall plainly appear thereon as to the safe and proper use of the contents. Such label shall identify the particular substance contained therein. The phrase "volatile substances capable of producing toxic effect" as used herein shall include, but shall not be limited to, the following: benzene (benzol), toluene (toluol), coal tar naphtha, carbon tetrachloride, trichlorethylene, tetrachlorethylene (perchlorethylene), tetrachlorethane, methyl alcohol, and aromatic and chlorinated hydrocarbons of comparable volatility and toxicity.
N.C. Gen. Stat. § 66-85