|Molecular weight||450.707 g/mol|
|Names and Identifiers|
|Traditional Name||Vitamin K1, phytonadione, phylloquinone|
|CAS Registry Number||84-80-0|
Phytomenadione, also known as vitamin K1 or phylloquinone, is a vitamin found in food and used as a dietary supplement. As a supplement it is used to treat certain bleeding disorders. This includes in warfarin overdose, vitamin K deficiency, and obstructive jaundice. It is also recommended to prevent and treat hemorrhagic disease of the newborn. Use is typically recommended by mouth or injection under the skin. Use by injection into a vein or muscle is recommended only when other routes are not possible. When given by injection benefits are seen within two hours.