0 Vitamin K1 CAS 84-80-0 In APIs, Pharmaceutical Chemicals, Products 84-80-0,Vitamin K1,2-Methyl-3-phytyl-1,4-naphthoquinone; Phylloquinone; 2-Methyl-3-(3,7,11,15-tetramethyl-2-hexadecenyl)-1,4-naphthalenedione