661-20-1 71000-82-3 Cyanate Cyanate ion Isocyanates, flammable, toxic, n.o.s. or isocyanate solutions, flammable, toxic, n.o.s., Fp <23 C [UN2478] [Flammable liquid, Poison, Keep away from food] Isocyanates, toxic, flammable, n.o.s. or isocyanate solutions, toxic, flammable, n.o.s., Fp not <23 C but not