Vitamin B12, also known as cobalamin, is a polycyclic compound containing trivalent cobalt. Four reduced pyrrole rings are linked together to form a large cyrin ring (similar to porphyrin), which is the only vitamin containing a metal element. Vitamin B12 is a red crystalline powder, odorless and tasteless. It is soluble in water, slightly soluble in ethanol, and insoluble in acetone, chloroform and ether. It is most stable under weak acid conditions with a pH value of 4.5 to 5.0. It decomposes in strong acids (pH<2) or alkaline solutions and can be damaged to a certain extent when exposed to heat. Higher animals and plants cannot produce vitamin B12. All vitamin B12 in nature is synthesized by microorganisms.
FAQs
Q:How long is the supply cycle?
A: Regular orders will be shipped within 3 working days, while large orders (over 2 tons) require confirmation 10 days in advance. We have a regular safety stock and cooperate with multiple logistics companies to ensure timely transportation. Special needs can be negotiated for expedited processing.
Q:Can you provide technical support?
A: We have a professional R&D team that can provide descriptions of raw material characteristics, formula recommendations, and application cases (such as tablets, powders, soft capsules, etc.). If you need assistance with product filing, we can also provide compliance guidance.
Q:What is the minimum order quantity (MOQ)?
A:The standard MOQ is 100kg, while the MOQ for some high-value raw materials is 10kg. New customers can apply for a trial order (1-5kg) first, and the sample fee can be deducted from subsequent orders.
Q:What are the payment methods?
A:Support international trade common payment methods such as T/T and letter of credit (L/C).
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