Glycyl tyrosine

NAME

common name

甘氨酰酪氨酸

English name

glycyl tyrosine

chemical name

(2S)-2-(2-aminoacetyl)-3-(4-hydroxyphenyl)-propionic acid

CAS number

658-79-7

Chemical structure

Chemical Structure

Molecular formula

C₁₁H₂₂N₂O₄.H₂O

Molecular weight

238.24

Main quality standard

project

Standard limit

Traits

White crystalline or crystalline powder, almost odorless, soluble in water. Specific rotation +46.0°~+50.0°

Identification

Examination pH

4.5~6.0

Solution transmittance

1.0g plus 2mol / L hydrochloric acid solution diluted to 20ml, 430nm transmittance, not less than 95.0%.

chloride

≤0.01%

Sulfate

≤0.02%

Ammonium salt

≤0.1%

Glycine tyrosine

Glycine≤1.0%， tyrosine≤1.5%。

relative substance

Cycloglycyl tyrosine≤0.2%，Pentanoyl tyrosine≤0.1%，Glycyl glycyl tyrosine≤0.3%；Any individual unspecified impurity≤0.1%，Total unknown impurity≤0.5%

remaining solvent

Ethanol≤0.05%，toluene≤ 0.089%

Loss on drying

12.0%~15.0%

Reducing substance

≤0.10%

Iron salt

≤0.001%

Heavy metal

≤5ppm

Arsenic salt

≤0.0001%

Bacterial endotoxin

≤12EU/g

Microbial Limit

The number of bacteria detected per 1g shall not exceed 100, and the number of molds and yeasts shall not exceed 10, and Escherichia coli, Staphylococcus aureus and Pseudomonas aeruginosa shall not be detected, and Salmonella shall not be detected in every 10g of the test sample.

content

99.0%～101.5%