DL-Cystine

About DL-Cystine

DL-Cystine is an organosulfur compound carrying the CAS registry number 923-32-0. Its molecular formula is C6H12N2O4S2 and its molecular weight is 240.3 g/mol. Its systematic (IUPAC) name is 2-amino-3-[(2-amino-2-carboxyethyl)disulfanyl]propanoic acid. It is also known as .beta.,.beta.'-Dithiodialanine or (H-Cys-OH).

Keep the container tightly sealed and store it in a cool, dry area. It carries the GHS signal word “Warning” with 1 hazard statement. Review the Safety Data Sheet before use.

Key uses span organic synthesis and API synthesis. Buyers come mainly from pharmaceutical manufacturing and academic and industrial research.

Standard pack sizes are 100 mg, 250 mg, 1 g and 5 g, and every batch ships with a Certificate of Analysis (COA) and we export worldwide. SDS and detailed specification sheets can be requested with your quotation.

Typical applications

Organic synthesis
API synthesis

Industries

Specifications & identifiers

Chemical identifiers
Product name	DL-Cystine
Catalogue No.	VQ-047688
CAS Number	923-32-0
IUPAC name	2-amino-3-[(2-amino-2-carboxyethyl)disulfanyl]propanoic acid
Molecular formula	C₆H₁₂N₂O₄S₂
Molecular weight	240.3 g/mol
Exact mass	240.0238
InChIKey	LEVWYRKDKASIDU-UHFFFAOYSA-N
SMILES	C(C(C(=O)O)N)SSCC(C(=O)O)N
PubChem CID	595

Physical properties
Physical form	Other
LogP (XLogP3)	-6.3
H-bond donors / acceptors	4 / 8
TPSA	177 Å²
Synonyms	2-Azaniumyl-3-((2-Azaniumyl-2-Carboxylatoethyl)Disulfanyl)Propanoate, .beta.,.beta.'-Dithiodialanine, (H-Cys-OH), (+/-)-3,3'-Dithiobis(2-aminopropionicacid), Bis(.beta.-amino-.beta.-carboxyethyl)disulfide, Bis(.beta.-amino-.beta.-carboxyethyl) disulfide, Cystein disulfide, Zystin, 3,3'-Dithiobis (2-aminopropanoic acid), (R,R)-3,3'-Dithiobis(2-aminopropionicacid), Alanine,3'-dithiodi-, Alanine,3'-dithiobis-

Safety & hazard information (GHS)

Harmful / irritant

Signal word: Warning

Hazard statements

H302Harmful if swallowed

Precautionary statements: P264, P270, P301 + P317, P330, 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

Frequently asked questions

What is the CAS number of DL-Cystine?

The CAS Registry Number of DL-Cystine is 923-32-0. It is also known as 2-Azaniumyl-3-((2-Azaniumyl-2-Carboxylatoethyl)Disulfanyl)Propanoate, .beta.,.beta.'-Dithiodialanine, (H-Cys-OH).

What is the molecular formula and molecular weight of DL-Cystine?

DL-Cystine has the molecular formula C6H12N2O4S2 and a molecular weight of 240.3 g/mol. Its IUPAC name is 2-amino-3-[(2-amino-2-carboxyethyl)disulfanyl]propanoic acid.

Which grade and pack sizes of DL-Cystine can I order?

We supply DL-Cystine, in 100 mg, 250 mg, 1 g, 5 g packs. Larger bulk quantities and custom packing are quoted on request.

Do you provide a COA and SDS with DL-Cystine?

Yes. Every lot of DL-Cystine 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 DL-Cystine be shipped internationally?

Yes. DL-Cystine 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.