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  • L-Cysteine  52-90-4
Name:L-Cysteine 52-90-4
CAS No:52-90-4

PRODUCT DESCRIPTION


Description

Cysteine (abbreviated as Cys or C) is a semi-essential proteinogenic amino acid with the formula HO2CCH(NH2)CH2SH>. It is encoded by the codons UGU and UGC. The thiol side chain in cysteine often participates in enzymatic reactions, as a nucleophile. The thiol is susceptible to oxidization to give the disulfide derivative cystine, which serves an important structural role in many proteins. When used as a food additive, it has the Enumber E920.

Basic Info

Chemical Name L-Cysteine
Synonyms

H-CYS-OH;L-Cys;L-Cysteine;CYSH;E 920;(R)-2-Amino-3-mercaptopropionic acid;FEMA 3263;CYS;Thioserine;CYSTEINE;Cystein;Collapse

CAS No. 52-90-4
Molecular Formula C3H7NO2S
Molecular Weight 121.15800
PSA 102.12000
LogP 0.02840

Numbering system

MDL number MFCD00064306

Properties

Appearance & Physical State White crystalline powder
Density 1.334 g/cm3
Boiling Point 293.9ºC at 760 mmHg
Melting Point 220ºC
Flash Point 131.5ºC
Refractive Index 8.8 ° (C=8, 1mol/L HCl)
Water Solubility 280 g/L (25 ºC)
Stability Stability Stable, but may be air sensitive. Incompatible with oxidizing agents, bases.
Storage Condition Store at RT.

Safety Info

RTECS HA1600000
Safety Statements S26-S37/39
HS Code 2930901000
WGK Germany 3
Risk Statements R22; R36/37/38
Hazard Codes Xn

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