Menaquinone-9 (CAS 523-39-7) is a long-chain vitamin K2 with a nine-unit all-trans isoprenoid side chain, chemically a 2-methyl-1,4-naphthoquinone bearing a nonaprenyl tail (C56H80O2, molecular weight 785.2). It is obtained by bacterial fermentation and standardised to all-trans MK-9 by HPLC. Within the K2 group its tail is longer than those of MK-7 (seven isoprene units, 649.0 g/mol) and MK-4 (four units, 444.6 g/mol), giving it the higher molecular weight of 785.2, and it differs from K1 in having a polyunsaturated menaquinone chain rather than the single-double-bond phytyl chain of phytonadione. It is a fat-soluble material supplied as an oil concentrate, and we manufacture it into softgels, capsules, tablets and liquids.
- Softgels
- Capsules
- Tablets
- Liquids
Applications
Single-ingredient supplements, multivitamins and vitamin K2 blends.
Documentation & quality
Every order is backed by the documents your quality team files, and the controls behind them.
Certificate of Analysis
every batchSpecification sheet
on requestAllergen statement
on requestGMO statement
on requestTraceability
on requestSafety Data Sheet
where applicableHow it’s controlled
- Identity verified on every incoming raw material
- Screened for heavy metals and microbial contaminants
- Full batch and lot traceability
- Produced under our certified NSF GMP system
Other forms of Vitamin K
Phytonadione (Vitamin K1)
2-Methyl-3-[(E,7R,11R)-3,7,11,15-tetramethylhexadec-2-enyl]naphthalene-1,4-dione
- CAS
- 84-80-0
- Formula
- C31H46O2
- Vegan
- Gluten-free
- Non-GMO
Menatetrenone (Vitamin K2 MK-4)
2-Methyl-3-[(2E,6E,10E)-3,7,11,15-tetramethylhexadeca-2,6,10,14-tetraenyl]naphthalene-1,4-dione
- CAS
- 863-61-6
- Formula
- C31H40O2
- Vegan
- Gluten-free
- Non-GMO
Menaquinone-7 (Vitamin K2 MK-7), fermentation
2-[(2E,6E,10E,14E,18E,22E)-3,7,11,15,19,23,27-Heptamethyloctacosa-2,6,10,14,18,22,26-heptaenyl]-3-methylnaphthalene-1,4-dione
- CAS
- 2124-57-4
- Formula
- C46H64O2
- Vegan
- Gluten-free
Menaquinone-7 (Vitamin K2 MK-7), synthetic
2-[(2E,6E,10E,14E,18E,22E)-3,7,11,15,19,23,27-Heptamethyloctacosa-2,6,10,14,18,22,26-heptaenyl]-3-methylnaphthalene-1,4-dione
- CAS
- 2124-57-4
- Formula
- C46H64O2
- Vegan
- Gluten-free
- Non-GMO
Menadione (Vitamin K3)
2-Methylnaphthalene-1,4-dione
- CAS
- 58-27-5
- Formula
- C11H8O2
- Vegan
- Gluten-free
- Non-GMO
Menadione Sodium Bisulfite (MSB)
Sodium 2-methyl-1,4-dioxo-3H-naphthalene-2-sulfonate
- CAS
- 130-37-0
- Formula
- C11H9NaO5S
- Vegan
- Gluten-free
- Non-GMO