Merck
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168149

Sigma-Aldrich

L-Cysteine

97%

Synonym(s):
(R)-2-Amino-3-mercaptopropionic acid
Linear Formula:
HSCH2CH(NH2)CO2H
CAS Number:
Molecular Weight:
121.16
Beilstein:
1721408
EC Number:
MDL number:
eCl@ss:
32160406
PubChem Substance ID:
NACRES:
NA.22

Assay

97%

form

solid

optical activity

[α]20/D +6.5±1.5°, c = 2 in 5 M HCl

optical purity

ee: 96% (GLC)

reaction suitability

reaction type: solution phase peptide synthesis

mp

240 °C (dec.) (lit.)

solubility

hydrochloric acid: 5% in 1N, clear, colorless

application(s)

peptide synthesis

SMILES string

N[C@@H](CS)C(O)=O

InChI

1S/C3H7NO2S/c4-2(1-7)3(5)6/h2,7H,1,4H2,(H,5,6)/t2-/m0/s1

InChI key

XUJNEKJLAYXESH-REOHCLBHSA-N

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W326305778672V900400
L-Cysteine 97%

Sigma-Aldrich

168149

L-Cysteine

L-Cysteine ≥97%, FG

Sigma-Aldrich

W326305

L-Cysteine

L-Cysteine produced by Wacker Chemie AG, Burghausen, Germany, ≥98.0%

Sigma-Aldrich

778672

L-Cysteine

L-Cysteine Vetec™, reagent grade, 97%

Sigma-Aldrich

V900400

L-Cysteine

assay

97%

assay

≥97%

assay

≥98.0%

assay

97%

form

solid

form

-

form

powder

form

crystalline powder

optical activity

[α]20/D +6.5±1.5°, c = 2 in 5 M HCl

optical activity

[α]26/D +8.0 to +9.5°, c = 2 in 5 M HCl

optical activity

[α]/D 8 to 9.5°

optical activity

-

mp

240 °C (dec.) (lit.)

mp

240 °C (dec.) (lit.)

mp

240 °C (dec.) (lit.)

mp

240 °C (dec.) (lit.)

solubility

hydrochloric acid: 5% in 1N, clear, colorless

solubility

H2O: 25 mg/mL

solubility

-

solubility

-

Quality Level

200

Quality Level

400

Quality Level

100

Quality Level

-

General description

L-cysteine is a sulfur-containing non-essential amino acid. Its ability to reduce colitis symptoms is being assessed for potential use in treating inflammatory bowel disease (IBD).
Naturally occurring non-essential amino acid.

Application

L-cysteine can be used as a cysteine source to prepare L-cysteine functionalized gold nanoparticles for use as probes in the colorimetric detection of Hg2+ in aqueous solution.

Biochem/physiol Actions

NMDA glutamatergic receptor agonist.

Storage Class Code

11 - Combustible Solids

WGK

WGK 1

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

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