Vitamin K3 

Vitamin K3 is known for its contribution to the blood clotting or coagulation process. Menadione (vitamin K3) is the form of vitamin K that is used in animal nutrition. Vitamin K3 is supplied in a number of forms: menadione sodium bisulphite (MSB) and menadione nicotinamide bisulphite (MNB).  

Main function

Blood coagulation

Biological functions

Vitamin K3 contributes to blood clotting and coagulation. It also acts as a coenzyme in other metabolic processes related to bone mineralisation, protein formation and some specific to cell growth.

Benefits to the animal

Improvement in performance. Supports general health and well-being. Prevents bleeding. 

Product specifications & properties

Vitamin K3 (MNB)

  • Content: min. 96%
  • Loss on drying max. 1.5%
  • Appearance: white to yellow crystal powder
  • Type of synthesis: chemical synthesis

Vitamin K3 (MSB)

  • Content: min. 96%
  • Loss on drying: max. 13%
  • Appearance: white crystalline powder
  • Type of synthesis: chemical synthesis
  • Additional testing: additional testing in an external laboratory according to P 04 A 01
  • Storage: no special guidelines, store in sealed boxes below 25°C, avoid light and moisture
  • Stability: 2–3 years  (depending on the product)
  • Packaging: 25 kg cardboard boxes

Regulatory status

Feed additive, category: vitamins, provitamins and chemical substances with similar effects

Manufacturing and supply

WELDING supplies vitamin K3 MNB (EU Code: 3a711) and vitamin K3 MSB (EU Code: 3a710) from qualified Chinese manufacturers.


Welding GmbH & Co. KG is not the manufacturer of the product. All product information and analytical data serves only as a product description and has been provided to us by the manufacturer. It may not be interpreted as a guarantee of special properties or a guarantee of suitability for specific purposes. The customer is required to examine the suitability of the product for the intended purpose himself/herself before use.