DL histidine / (±) - 2-amino-3 - (4-imidazolyl) propionic acid

English Name: DL histidine; (±)-2-Amino-3-(4-imidazolyl)propionic acid

Other names:  Dl-2-amino-3 - (1h-imidazol-4-yl) propionic acid; DL tissue amino acid

CAS No.: 4998-57-6

C6H9N3O2=155.16

Grade: br

Content: ≥ 99.0%

Specific rotation: 14.3 ~ 15.2 °

Chloride: ≤ 0.10%

Heavy metals: ≤ 10ppm

Arsenic salt: ≤ 2ppm

Loss on drying: ≤ 0.20%

Burning residue: ≤ 0.20%

Physicochemical properties: white or light yellow crystalline powder. Soluble in water, insoluble in ethanol, ether, acetone and chloroform. Melting point 285 ~ 286 ℃ (decomposition).

Purpose: biochemical research

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