Methylcobalamin (mecobalamin, MeCbl, or MeB12) is a cobalamin, a form of vitamin B12. It differs from cyanocobalamin in that the cyano at the cobalt is replaced with a methyl group. Methylcobalamin features an octahedral cobalt(III) centre and can be obtained as bright red crystals. From the perspective of coordination chemistry, methylcobalamin is notable as a rare example of a compound that contains metal-alkyl bonds. Nickel-methyl intermediates have been proposed for the final step of methanogenesis.

CAS：13422-55-4
中文别名：甲基维生素B;
英文别名：Methylcobalamin;Hitocobamin-M;Mecobalamin;methycobal;MECOBALAMINE;methyl-b12;Algobaz;MeCbl;Methylcobaz;mbl-a;
分子式：C63H91CoN13O14P
分子量：1344.38
精确质量：1343.59
Psa：463.87
Logp：7.1993

RTECS号：GG3745000
EINECS号：236-535-3
MDL号：MFCD00082483

外观与性状：暗红色结晶粉末
储存条件：-20ºC

安全说明：S24/25; S36; S26
危险类别码：R36/37/38
海关编码：2936260000
危险品标志：Xi

用途
用于治疗神经系统疾病,缓解疼痛和麻木,速缓解神经痛,改善颈椎病引起的疼痛,治疗突发性耳聋等