Folic acid English name: Folic acid CAS No.: 59-30-3 Molecular formula: C19H19N7O6 Molecular weight: 441.3790 Appearance and traits: yellow to orange yellow crystal or crystalline powder Density: 1.68 g/cm3 Melting point: 250 °C (decomposition) Uses: It can be used to relieve the toxicity caused by excessive aminoguanidine and methotrexate, and can also be used to treat giant red blood cell anemia. It acts as a Lactobacillus casei and other microorganisms to promote proliferation factors. It is the same substance as vitamin M. It is known that various derivatives of PGA also have the same substances as PGA which promote growth and promote hematopoietic factors, among which are polyglutamic acid, formyl derivative and tetrahydrofolate of folic acid. The cheese lactic acid bacteria factor and vitamin Bc complex, which have been found to cause active folic acid, have Bc-binding enzymes that decompose them into folic acid in animals, and are as effective as ready-to-use folic acid. Rhizopus pteridophyte (SLR factor) is considered to be a decomposition product of formyltetrahydrofolate and is ineffective against animals.