Chemistry informtion about Vitamin K1 (CAS NO.12001-79-5) is:
IUPAC Name: 2-methyl-3-(3,7,11,15-tetramethylhexadec-2-enyl)naphthalene-1,4-dione ; 2-methyl-3-[(E)-3,7,11,15-tetramethylhexadec-2-enyl]naphthalene-1,4-dione
Synonyms: Vitamin K ; Synkavite ; 2-Methyl-3-[(E)-3,7,11,15-Tetramethylhexadec-2-Enyl]Naphthalene-1,4-Dione;Vitamin K1 Usp23 ; Vitamin K Substances
MF: C₃₁H₄₆O₂
MW: 450.7
EINECS: 201-564-2
Melting Point: −20 °C(lit.)
Density: 0.963 g/cm³
Flash Point: 200.4 °C 
Boiling Point: 546.4 °C at 760 mmHg
Vapour Pressure: 5.37E-12 mmHg at 25°C 
Enthalpy of Vaporization: 82.55 kJ/mol
Refractive Index: n20/D 1.527(lit.)
Form: viscous liquid
Storage temp.: 2-8°C
Following is the molecular structure of Vitamin K1 (CAS NO.12001-79-5) is:

 Vitamin K1 (CAS NO.12001-79-5) i njection is indicated in: anticoagulant-induced prothrombin deficiency caused by coumarin or indanedione derivatives;prophylaxis and therapy of hemorrhagic disease of the newborn.

Reported in EPA TSCA Inventory.

Moderately toxic by subcutaneous route. An experimental teratogen. When heated to decomposition it emits acrid smoke and irritating fumes.
WGK Germany: 2
RTECS: QJ5800000
F:
F 1: Sensitive to air and humidity.
F 8: Photosensitive.
F 9:  Keep under nitrogen.
F 10:  Keep under argon.

 Vitamin K1 (CAS NO.12001-79-5) is a fat-soluble vitamin that is stable to air and moisture but decomposes in sunlight. It is found naturally in a wide variety of green plants.