M02000000 Mercaptans, liquid, flammable, toxic, n.o.s. or mercaptan mixtures, liquid, flammable, toxic, n.o.s. [UN1228] [Flammable liquid, Poison] Mercaptans, liquid, flammable, toxic, n.o.s. or mercaptan mixtures, liquid, flammable, toxic, n.o.s., Fp not <23 C [UN3071] [Poison, Flammable liquid] UN1228 UN3071