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L-Cysteine

Name: <SC>L</SC>-Cysteine
Brand: SIGMA

≥98.5% (RT), suitable for HPLC, BioUltra

Synonym(s):

(R)-2-Amino-3-mercaptopropionic acid

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About This Item

Linear Formula:

HSCH₂CH(NH₂)CO₂H

CAS Number:

52-90-4

Molecular Weight:

121.16

NACRES:

NA.26

PubChem Substance ID:

57648406

eCl@ss:

32160406

UNSPSC Code:

12352209

EC Number:

200-158-2

MDL number:

MFCD00064306

Beilstein/REAXYS Number:

1721408

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Properties

Product Name

L-Cysteine, BioUltra, ≥98.5% (RT)

product line

BioUltra

Quality Segment

200

assay

≥98.5% (RT)

form

powder or crystals

optical activity

[α]20/D +8.0±0.5°, c = 5% in 5 M HCl

technique(s)

HPLC: suitable

impurities

insoluble matter, passes filter test, ≤0.5% foreign amino acids

ign. residue

≤0.05% (as SO₄)

loss

≤0.05% loss on drying, 20 °C (HV)

color

white

mp

240 °C (dec.) (lit.)

solubility

1 M HCl: 1 M at 20 °C, clear, colorless

anion traces

chloride (Cl^-): ≤100 mg/kg, sulfate (SO₄^2-): ≤50 mg/kg

cation traces

Al: ≤5 mg/kg, As: ≤0.1 mg/kg, Ba: ≤5 mg/kg, Bi: ≤5 mg/kg, Ca: ≤10 mg/kg, Cd: ≤5 mg/kg, Co: ≤5 mg/kg, Cr: ≤5 mg/kg, Cu: ≤5 mg/kg, Fe: ≤5 mg/kg, K: ≤50 mg/kg, Li: ≤5 mg/kg, Mg: ≤5 mg/kg, Mn: ≤5 mg/kg, Mo: ≤5 mg/kg, NH₄⁺: ≤500 mg/kg, Na: ≤100 mg/kg, Ni: ≤5 mg/kg, Pb: ≤5 mg/kg, Sr: ≤5 mg/kg, Zn: ≤5 mg/kg

λ

1 M in 1 M HCl

UV absorption

λ: 260 nm A_max: 1.5, λ: 280 nm A_max: 0.2

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

Description

Application

L-Cysteine has been used in quenching of unreacted maleimide during antibody grafting. It has also been used in the preparation of nitrosocysteine stock solution, that has been employed to induce S-nitrosylation to achieve reversible cysteine modification.

Biochem/physiol Actions

NMDA glutamatergic receptor agonist.

Cysteine is one of the functional amino acids that regulates metabolism for growth, reproduction, maintenance and immunity. Cysteine provides the disulfide linkage in proteins. It is directly associated with the transport of sulfur. Taurine, a metabolic product of cysteine acts as an antioxidant and controls the cellular redox state. Cysteine is involved in the formation of hydrogen sulfide that is utilized as a signaling molecule.

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This Item	778672	C7352	W326305
Sigma-Aldrich 30089 L-Cysteine	Sigma-Aldrich 778672 L-Cysteine	Sigma-Aldrich C7352 L-Cysteine	Sigma-Aldrich W326305 L-Cysteine
description BioUltra, ≥98.5% (RT)	description Wacker Chemie AG, ≥98.0%	description from non-animal source, BioReagent, suitable for cell culture, ≥98%	description ≥97%, FG
form powder or crystals	form powder	form crystalline powder	form -
assay ≥98.5% (RT)	assay ≥98.0%	assay ≥98%	assay ≥97%
technique(s) HPLC: suitable	technique(s) -	technique(s) cell culture \| mammalian: suitable	technique(s) -
product line BioUltra	product line -	product line BioReagent	product line -
cation traces Al: ≤5 mg/kg, Ba: ≤5 mg/kg, Ca: ≤10 mg/kg, Co: ≤5 mg/kg, Cu: ≤5 mg/kg, K: ≤50 mg/kg, Mg: ≤5 mg/kg, Mo: ≤5 mg/kg, Na: ≤100 mg/kg, Pb: ≤5 mg/kg, Zn: ≤5 mg/kg, As: ≤0.1 mg/kg, Cd: ≤5 mg/kg, Fe: ≤5 mg/kg, Mn: ≤5 mg/kg, Ni: ≤5 mg/kg, Bi: ≤5 mg/kg, Li: ≤5 mg/kg, Sr: ≤5 mg/kg, Cr: ≤5 mg/kg, NH₄⁺: ≤500 mg/kg	cation traces Fe: ≤10 ppm	cation traces -	cation traces -
impurities insoluble matter, passes filter test, ≤0.5% foreign amino acids	impurities ≤0.5% ninhidrin positive substances (each), ≤10 ppm heavy metals, ≤300 ppm ammonium	impurities endotoxin, tested	impurities -

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Storage Class

11 - Combustible Solids

wgk

WGK 1

flash_point_f

Not applicable

flash_point_c