Product name: Cytosine
Alias: 4-Amino-2-hydroxypyrimidine
Molecular formula: C4H5N3O
Molecular weight: 111.10
CAS NO.: 71-30-7
Molecular structure:
I. Introduction:
White flaky crystal. Lose water at 100°C, turn brown at 300°C, decompose at 320-325°C. 1g product is soluble in 130ml water, slightly soluble in ethanol, insoluble in ether. When the PH is 2, the maximum absorption wavelength is 276nm, molar absorption coefficient is 10,000, the minimum absorption wavelength is 238nm and the absorbance ratio is A250/A260=0.48, A280/A260=1.53, A290/A260=0.78. Irritating.
II. Quality index:
Appearance: White or almost white crystalline powder
Purity (HPLC): ≥98.0%
Loss on drying: ≤1.0%
Ignition residue: ≤0.2%
Heavy metals: ≤20ppm
III. Use:
Cytidine and cytidylate can be used as the drug to increase white blood cell. Cytidine is an important intermediate in fine chemical, pesticide and pharmaceutical. Especially in the filed of pharmaceutical, mainly used in the synthesis of anti-AIDS drug and anti-hepatitis B drug lamivudine, anti-cancer drug gemcitabine, enocitabine and fluorocytosine, etc. The application scope is wide.
IV. Packing specification:
25kg/barrel.
V. Note:
Sealed storage in cool and dry place.