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DL-Histidine Structure

DL-Histidine

Chemical Properties

Melting point 273 °C (dec.)(lit.)
Boiling point 278.95°C (rough estimate)
Density  1.3092 (rough estimate)
refractive index  1.6500 (estimate)
storage temp.  Keep in dark place,Inert atmosphere,Room temperature
solubility  0.5 M HCl: soluble
pka 1.8(at 25℃)
form  powder to crystal
color  White to Almost white
Merck  14,4720
BRN  7800
CAS DataBase Reference 4998-57-6(CAS DataBase Reference)
FDA 21 CFR 582.5361; 310.545
EWG's Food Scores 1
FDA UNII QU6SDF3Q03
EPA Substance Registry System Histidine (4998-57-6)

Safety

Symbol(GHS)
Signal wordWarning
Hazard statements H315-H319-H335
Precautionary statements P261-P305+P351+P338
Hazard Codes  Xn
Risk Statements  22-36/37/38
Safety Statements  22-24/25-36/37-26
WGK Germany  3
HS Code  29339900

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DL-Histidine Chemical Properties,Usage,Production

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