English name: VB12; Cyanocobalamin; Vitamin B12; Cyanocob (III) alamin; α- (5,6-Dimethylbenzimidazolyl) cyanocobamide
Other names: Vitamin B 12; Cyanocobalamin; Vitamin B12
CAS number: 68-19-9
C63H88CoN14O14P = 1355.38
Level: BR
Content: ≥98.0%
Identification: Qualified dry weight loss: ≤12.0%
Related substances: ≤3.0%
Properties: dark red crystalline powder. No odor, tasteless, sensitive to light. It is hygroscopic and can absorb 12% moisture in the air. Its water-containing crystals are stable in the air. The color becomes darker at 210 ～ 220 ℃, and does not melt at 300 ℃ Its aqueous solution is neutral and most stable at pH 4.5-5. 1g is soluble in about 80ml water, soluble in ethanol, insoluble in acetone, chloroform and ether. Specific rotation -59 ° ± 9 ° (in dilute aqueous solution). Maximum absorption wavelength (in water) 278, 361, 550nm (A1% 1cm 115, 204, 64). The minimum lethal dose (rat, abdominal cavity) 1364mg / kg
Uses: biochemical research. Tissue culture preservation: 2 ～ 8 ℃, protected from light
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