No person shall sell, barter, or exchange, or receive, hold, pack, display, or offer for sale, barter, or exchange, in this state any dangerous caustic or corrosive substance in a misbranded parcel, package, or container, said parcel, package, or container being designed for household use; PROVIDED, That household products for cleaning and washing purposes, subject to this chapter and labeled in accordance therewith, may be sold, offered for sale, held for sale, and distributed in this state by any dealer, wholesale or retail; PROVIDED FURTHER, That no person shall be liable to prosecution and conviction under this chapter when he or she establishes a guaranty bearing the signature and address of a vendor residing in the United States from whom he or she purchased the dangerous caustic or corrosive substance, to the effect that such substance is not misbranded within the meaning of this chapter. No person in this state shall give any such guaranty when such dangerous caustic or corrosive substance is in fact misbranded within the meaning of this chapter.
RCW 69.36.020