High Purity and Good Effect CAS 52-90-4 L-Cysteine

Product Description
Product Description
High Purity and Good Effect CAS 52-90-4 L-Cysteine

Molecular Weight:121.17

L-Cysteine Free Base;Valine,L-2-Amino-3-mercaptopropanoic acid;(2R)-2-amino-3-sulfanyl-propanoic acid;Half-cystine;L-2-Amino-3-mercaptopropionic acid;L-Cysteine Base;(+)-2-Amino-3-mercaptopropionic acid
Density:1.334 g/cm3
Melting Point:220 °C
Boiling Point:293.9 °C at 760 mmHg
Flash Point:131.5°C
Solubility:280 g/L (25°C) in water
Appearance:white crystalline powder
Assay: 99.0% to 101.0%
Package: 25kg/drum
Storage: cool, dry and ventilated place
Application: Cysteine, mainly the L-enantiomer, is a precursor in the food, pharmaceutical, and personal care.


Cysteine (abbreviated as Cys or C)[3] is a semi-essential[4] proteinogenic amino acid with the formulaHO2CCH(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 thedisulfide derivative cystine, which serves an important structural role in many proteins. When used as a food additive, it has the E number E920.
It can be seen as serine, but with one of the oxygen atoms replaced with sulfur; replacing said atom withselenium gives selenocysteine.

Author: chemicals

Here is chemical sourse

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s