Chloramphenicol
Appearance：A white, greyish-white or yellow-white, fine, crystalline power or fine crystals, needles or elongated plates .
Solubility:：Slightly soluble in water, freely soluble in alcohol and in propylene glycol. Its alcohol solution is dextrorotatory and its ethyl acetate solution is levorotatory.
Acidity or alkalinity：Not more than 0.1 ml；
Specific optical rotation：+18.5~+20.5；
Chloride：≤100ppm；
Related substance(TCL)：≤0.5%；
Loss on drying ：≤0.5%；
Sulphated ash：≤0.1%；
Assay：98.0~102.0%.
Description
English name: Chloramphenicol
Chemical name: D-(−)-threo-2-Dichloroacetamido-1-(4-nitrophenyl)-1,3-propanediol；2,2-dichloro-N-[(1R,2R)-2-hydroxy-1-(hydroxymethyl)-2-(4-nitrophenyl)ethyl]acetamide；2,2-dichloro-N-[(1R,2R)-1,3-dihydroxy-1-(4-nitrophenyl)propan-2-yl]acetamide.
Molecular formula: C11H12Cl2N2O5
Molecular weight: 323.13
CAS NO.: 56-75-7
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