L-Cysteine, 99%+

Name: L-Cysteine, 99%+
Brand: Vaqora Chemicals
SKU: VQ-002126

About L-Cysteine, 99%+

Vaqora Chemicals supplies L-Cysteine (Biochemistry grade), an amino acid derivative registered under CAS number 52-90-4 at a purity of ≥99%. With the molecular formula C3H7NO2S, it has a molar mass of 121.16 g/mol. The IUPAC name is (2R)-2-amino-3-sulfanylpropanoic acid. Alternative names: (R)-2-Amino-3-mercaptopropionic acid and cysteine.

The material typically appears as white powder or crystal or chunks. Store in a tightly closed container in a cool, dry and well-ventilated place. The GHS classification uses the signal word “Warning”, so appropriate gloves, eye protection and ventilation are recommended.

Key uses span peptide synthesis, cell culture media, biochemical research and protein and peptide research. Our customers for this product work in academic and industrial research and diagnostics and biotechnology.

Available in 5 g, 25 g, 100 g and 500 g packs, L-Cysteine is dispatched with a Certificate of Analysis (COA) to destinations worldwide.

Typical applications

Peptide synthesis
Cell culture media
Biochemical research
Protein & peptide research

Industries

Specifications & identifiers

Chemical identifiers
Product name	L-Cysteine, 99%+
Catalogue No.	VQ-002126
CAS Number	52-90-4
IUPAC name	(2R)-2-amino-3-sulfanylpropanoic acid
Molecular formula	C₃H₇NO₂S
Molecular weight	121.16 g/mol
Exact mass	121.0197
Grade	Biochemistry
Purity / assay	≥99%
HSN code	29309040
InChIKey	XUJNEKJLAYXESH-REOHCLBHSA-N
SMILES	C([C@@H](C(=O)O)N)S
PubChem CID	5862

Physical properties
Physical form	Crystalline
Appearance	White powder or crystal or chunks
LogP (XLogP3)	-2.5
H-bond donors / acceptors	3 / 4
TPSA	64.3 Å²
Synonyms	(R)-2-Amino-3-mercaptopropionic acid, cysteine, Cystein, (R)-2-Amino-3-mercaptopropanoic acid, Thioserine, Half-cystine, L-(+)-Cysteine, beta-Mercaptoalanine, L-Cystein, L-Cys, Half cystine, 2-Amino-3-mercaptopropionic acid

Safety & hazard information (GHS)

Harmful / irritant

Signal word: Warning

Hazard statements

H302Harmful if swallowed
H315Causes skin irritation
H319Causes serious eye irritation
H335May cause respiratory irritation

Precautionary statements: P261, P264, P264 + P265, P270, P271, P280, P301 + P317, P302 + P352, P304 + P340, P305 + P351 + P338, P319, P321, P330, P332 + P317, P337 + P317, P362 + P364, P403 + P233, P405, P501

Classification is indicative (aggregated GHS notifications) and may vary by grade and concentration. Always refer to the SDS supplied with your lot.

Documents

Safety Data Sheet (SDS)16-section GHS · on request Certificate of AnalysisTypical / batch COA · on request Specification sheetTDS / MOA · on request

Other grades of CAS 52-90-4

Reference Standard

Cysteine

CAS: 52-90-4
Formula: C₃H₇NO₂S
MW: 121.16 g/mol

VQ-007400

Cell Culture

L-Cysteine, cell culture tested

CAS: 52-90-4
Formula: C₃H₇NO₂S
MW: 121.16 g/mol

VQ-046326

Frequently asked questions

What is the CAS number of L-Cysteine, 99%+?

The CAS Registry Number of L-Cysteine, 99%+ is 52-90-4. It is also known as (R)-2-Amino-3-mercaptopropionic acid, cysteine, Cystein.

What is the molecular formula and molecular weight of L-Cysteine, 99%+?

L-Cysteine, 99%+ has the molecular formula C3H7NO2S and a molecular weight of 121.16 g/mol. Its IUPAC name is (2R)-2-amino-3-sulfanylpropanoic acid.

Which grade and pack sizes of L-Cysteine, 99%+ can I order?

We supply L-Cysteine, 99%+ in Biochemistry (≥99%) grade, in 5 g, 25 g, 100 g, 500 g, 5 kg, 25 kg packs. Larger bulk quantities and custom packing are quoted on request.

Do you provide a COA and SDS with L-Cysteine, 99%+?

Yes. Every lot of L-Cysteine, 99%+ is shipped with a batch-specific Certificate of Analysis, and a 16-section GHS Safety Data Sheet is provided with the quotation and the shipment.

Can L-Cysteine, 99%+ be shipped internationally?

Yes. L-Cysteine, 99%+ is classified as hazardous, so it is packed in UN-approved packaging and shipped as dangerous goods under IATA/IMDG rules. We export worldwide on EXW, FOB, CIF and DAP terms.