Vitamin K3 Menadione Sodium Bisulfite (MSB)

Menadione sodium bisulfite (CAS 130-37-0), also known as Vitamin K3 sodium bisulfite and commonly abbreviated as MSB, is the water-soluble bisulfite addition compound of menadione used as a source of provitamin K3 activity.

Where is Vitamin K3 Menadione Sodium Bisulfite (MSB) used?

• Animal feed and premix manufacturing: incorporated into poultry, swine, and aquaculture feeds
• Pharmaceutical manufacturing: injectable and oral dosage forms requiring a stable, water-dispersible vitamin K3 source
• Veterinary nutritional supplements: blended into concentrated premixes and water-soluble powder formulations for livestock administration
• Aquaculture feed concentrates: used where fat-soluble vitamin forms are impractical to process
• It supports blood coagulation function at established inclusion rates regulated by feed authorities.

Commercial specifications

• Feed-grade material conforming to specifications set by pharmacopoeial references such as USP and BP
• Bulk supply typically in 25 kg bags, with activity content standardized and declared on a percentage basis