Cysteine

Name: Cysteine
Brand: Vaqora Chemicals
SKU: VQ-007400

About Cysteine

Listed under CAS 52-90-4, Cysteine is a high-purity reference standard of Cysteine available from Vaqora Chemicals. With the molecular formula C3H7NO2S, it has a molar mass of 121.16 g/mol. Systematically, it is named (2R)-2-amino-3-sulfanylpropanoic acid. Alternative names: (R)-2-Amino-3-mercaptopropanoic acid and (R) -2-Amino-3-mercaptopropanoic acid.

It is supplied as a solid. Reference materials should be stored sealed and away from light and moisture, as specified on the accompanying COA. It carries the GHS signal word “Warning” with 4 hazard statements. Review the Safety Data Sheet before use.

Laboratories use this Cysteine standard for identity and assay testing, system suitability checks and method validation supporting ANDA and DMF filings. Our customers for this product work in pharmaceutical manufacturing and academic and industrial research.

Available in 10 mg, 25 mg, 50 mg and 100 mg packs, Cysteine is dispatched with a Certificate of Analysis (COA) to destinations worldwide.

Typical applications

Identification & assay
Method development & validation
QC reference material

Industries

Related to Cysteine

View every impurity, metabolite and intermediate we list for Cysteine.

Cysteine impurities

Specifications & identifiers

Chemical identifiers
Product name	Cysteine
Catalogue No.	VQ-007400
CAS Number	52-90-4
Other CAS	52-89-1, 7048-04-6
IUPAC name	(2R)-2-amino-3-sulfanylpropanoic acid
Molecular formula	C₃H₇NO₂S
Molecular weight	121.16 g/mol
Exact mass	121.0197
Grade	Reference Standard
HSN code	38229090
InChIKey	XUJNEKJLAYXESH-REOHCLBHSA-N
SMILES	C([C@@H](C(=O)O)N)S
PubChem CID	5862

Physical properties
Physical form	Solid
LogP (XLogP3)	-2.5
H-bond donors / acceptors	3 / 4
TPSA	64.3 Å²
Synonyms	(R)-2-Amino-3-mercaptopropanoic acid, (R) -2-Amino-3-mercaptopropanoic acid, (R)-2-Amino-3-sulfanylpropanoic acid, (R)-Cysteine, L-(+)-Cysteine, 2-Amino-3-mercaptopropanoic acid, 2-Amino-3-mercaptopropionic acid, Thioserine, β-Mercaptoalanine, Cystein, L-cysteine, Half-cystine

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

Biochemistry

L-Cysteine, 99%+

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

VQ-002126

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 Cysteine?

The CAS Registry Number of Cysteine is 52-90-4. It is also known as (R)-2-Amino-3-mercaptopropanoic acid, (R) -2-Amino-3-mercaptopropanoic acid, (R)-2-Amino-3-sulfanylpropanoic acid.

What is the molecular formula and molecular weight of Cysteine?

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

What is Cysteine used for?

Cysteine is supplied as a characterised reference material related to Cysteine. It is used for analytical method development and validation (AMV), impurity profiling, stability studies and quality control, and in ANDA/DMF regulatory filings.

Which grade and pack sizes of Cysteine can I order?

We supply Cysteine in Reference Standard grade, in 10 mg, 25 mg, 50 mg, 100 mg packs. Larger bulk quantities and custom packing are quoted on request.

Do you provide a COA and SDS with Cysteine?

Yes. Every lot of Cysteine 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 Cysteine be shipped internationally?

Yes. Cysteine 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.