L-Histidine

Short Description:

Alias: L-Histidine,free base;
L-HIS = H-His-OH;
(S)-2-Amino-3-(4-imidazolyl)propionic acid~H-His-OH;
L-Histidine Base;
H-His-OH;
His

CAS No.: 71-00-1

EINECS No.: 200-745-3

FEMA: 3694

Molecular Formula: C₆H₉N₃O₂

Molecular Weight: 105.09

InChIKey: HNDVDQJCIGZPNO-YFKPBYRVSA-N

Inquiry Now

Product Detail

Product Tags

Chemical Structural Formula

Physical & Chemical Properties

Property Description	Colorless needle-like or flaky crystal, softens at 277°C, decomposes at 287°C. Very slightly soluble in alcohol, insoluble in ether and chloroform. sweet.
Melting Point	282℃
Boiling Point	278.95℃(Rough Estimate)
Density	1.3092(Rough Estimate)
Refractive Index	13°(C=11, 6mol/L HCl)
Specific Rotation	12.4°(c=11, 6N HCl)
Water Solubility	41.6 g/L(25℃)
Acidity Coefficient	1.8 pKa (At 25°C)
Optical Activity	[α]20/D 39±1°, c = 2% in H₂O

Specifications

Testing Items	Specifications
Appearance	White crystals or crystalline powder
Identification	Infrared absorption
Specific Rotation	+12.6°~ +14.0°
Chloride	Not more than 0.05%
Sulfate	Not more than 0.03%
Iron	Not more than 30ppm
Loss on Drying	Not more than 0.20%
Residue on Ignition	Not more than 0.40%
Individual Impurities	Not more than 0.5%
Total Impurities	Not more than 2.0%
Total Plate Count	Not more than 1000CFU/g
Yeasts & Moulds	Not more than 100CFU/g
Escherichia coli	Negative
Assay	98.5% ~ 101.5%
pH Value	7.0 ~ 8.5

Brief Introduction

The product form of L-Histidine is white powder crystal. It is an important amino acid raw material drug and a semi-essential amino acid for the human body. It is mainly used as a raw material for amino acid infusion and oral amino acid preparations; in addition, it is also used for the treatment of heart disease, anemia, rheumatoid arthritis, peptic ulcer and Important drugs such as chronic hepatitis, etc., which is more and more widely used in the field of medicine. L-Histidine can also be used as a sweetener and used in biochemical research either.