Folic acid , with CAS number of 59-30-3, can be called Pteroyl-l-glutamic acid ; pteroylmonoglutamic acid ; pteroylglutamic acid ; pteroyglutamic acid ; pteglu ; pga ; n-[4-[[(2-amino-4-hydroxy-6-pteridyl)methyl]amino]benzoyl]glutamic acid ; n-4-[(2-amido-4-oxo-1,4-dihydro-6-terene)methylamino]benzoyl-l-glutamic acid . Folic Acid (CAS NO.59-30-3) is a toxic substance, with flammability, burning will produce toxic gases, so it should be stored in a tightly closed container which is cool, dry and well-ventilated, be away from incompatible substances and light. Dry powder, foam, sand, carbon dioxide, water mist can be used if something urgent happened.