Vitamins REACH

Vitamin K2 Menaquinone-4 (MK-4)

CAS Number

863-61-6

EC Number

234-264-5

Chemical Formula

C₃₁H₄₀O₂

Molecular Weight

444.6 g/mol

Abbreviation

MK-4

Form

powder, liquid, crystal, oil

Grade

USP, pharmaceutical

What is Vitamin K2 Menaquinone-4 (MK-4)?

Menatetrenone (CAS 863-61-6), commercially recognized as MK-4 and Menaquinone-4, is the synthetic short-chain form of Vitamin K2.

Pharmaceutical manufacturing: active ingredient in prescription bone-health therapeutics, with approved drug status in markets such as Japan
Nutraceutical and dietary supplement: softgels, tablets, and combination bone-health formulas alongside Vitamin D3 and calcium
Functional food and fortified beverages: on-pack K2 content claims in dairy and plant-based formats
Cosmetic formulators have explored its antioxidant activity.

Food- and supplement-grade material with standardized concentrations in premix and microencapsulated forms

Melting Point 35 °C

Boiling Point 494.59°C (rough estimate)

Density 1.0461 (rough estimate)

Flash Point 2°C

Appearance Yellow Crystals

Color Light Yellow to Yellow

Form neat

Refractive Index 1.5045 (estimate)

HS Code 2914699000

UN Number 1648

ADR Class 3

Packing Group II

Storage Class 11 - Combustible Solids

WGK (Germany) 3