We produce and supply vitamin series and animal medicine series in China.We can produce and supply high quality of vitamin k3 MSB 50% & 96% and above, vitamin k3 MNB 50% & 96% , D-Calcium Pantothenate, Allicin powder etc.All of them are produced under strict quality control systerm. Chemical Name: Menadione Nicotinamide Bisulfite Molecular Formula: C17H16O6N2S Physical characteristics: White crystal powder, little water-soluble( 1.3g/ 100ml) Efficacy: Based on MSB, combining with niacinamide molecular group, MNB has higher stability and bioactivity. It also saves the separate quantity of the addition of niacinamide. Referenced Dosage: 4-8 per ton( mixed fodder) Net Weight: 25kg Guarantee Period: 12months Storage: Against light, moisture and high temperature. Our price is reasonable and competitive , welcome to contact with me , I will give you the best price. MSN is : cynric2009@ hotmail.com , and the Skype contact is avalable , Skype ID is : cynric2009 I wait for your favorable inquiry. Best regards