N.H. Rev. Stat. Ann. § 339:52

No person shall manufacture for sale, keep for sale, or sell, for household use, any ammonia or any laundry type chlorinated bleaching fluid the label or package of which shall bear any false or misleading statements. Any ammonia for household use whether or not the word ammonia is qualified by "sudsy", "scented", "detergent", or any other combination of terms, shall have an ammonia content of not less than 4 percent by weight calculated as ammonia. Any laundry type chlorinated bleaching fluid shall contain not less than 2-1/4 percent by weight of available chlorine.