DL-Cystine-D4

Name: DL-Cystine-D4
Brand: Vaqora Chemicals
SKU: VQ-047318

About DL-Cystine-D4

Vaqora Chemicals supplies DL-Cystine-D4, a stable isotope labelled analogue related to Acetylcysteine registered under CAS number 108641-83-4. Its molecular formula is C6H12N2O4S2 and its molecular weight is 244.3 g/mol. The IUPAC name is 2-amino-3-[(2-amino-2-carboxy-1,1-dideuterioethyl)disulfanyl]-3,3-dideuteriopropanoic acid. It is also known as DL-Cystine-3,3,3',3'-d4.

It is supplied as a solid. Store the standard in its sealed vial, protected from light and moisture, and follow the storage condition printed on the COA. The GHS classification uses the signal word “Warning”, so appropriate gloves, eye protection and ventilation are recommended.

This isotope-labelled compound is used as an internal standard for LC-MS and LC-MS/MS quantitation of Acetylcysteine and related analytes in bioanalytical, pharmacokinetic and impurity studies. Buyers come mainly from pharmaceutical manufacturing and academic and industrial research.

Available in 10 mg, 25 mg, 50 mg and 100 mg packs, DL-Cystine-D4 is dispatched with a Certificate of Analysis (COA) to destinations worldwide.

Typical applications

LC-MS/MS internal standard
Bioanalytical quantitation
Pharmacokinetic studies

Industries

Related to Acetylcysteine

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

Acetylcysteine impurities

Grade guides

Specifications & identifiers

Chemical identifiers
Product name	DL-Cystine-D4
Catalogue No.	VQ-047318
CAS Number	108641-83-4
IUPAC name	2-amino-3-[(2-amino-2-carboxy-1,1-dideuterioethyl)disulfanyl]-3,3-dideuteriopropanoic acid
Molecular formula	C₆H₁₂N₂O₄S₂
Molecular weight	244.3 g/mol
Exact mass	244.049
Grade	Reference Standard
HSN code	38229090
InChIKey	LEVWYRKDKASIDU-LNLMKGTHSA-N
SMILES	[2H]C([2H])(C(C(=O)O)N)SSC([2H])([2H])C(C(=O)O)N
PubChem CID	12297020

Physical properties
Physical form	Solid
LogP (XLogP3)	-6.3
H-bond donors / acceptors	4 / 8
TPSA	177 Å²

Safety & hazard information (GHS)

Harmful / irritant

Signal word: Warning

Hazard statements

H319Causes serious eye irritation

Precautionary statements: P264 + P265, P280, P305 + P351 + P338, P337 + P317

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-D4?

The CAS Registry Number of DL-Cystine-D4 is 108641-83-4. It is also known as DL-Cystine-3,3,3',3'-d4, 3,3'-disulfanediylbis(2-aminopropanoic-3,3-d2 acid).

What is the molecular formula and molecular weight of DL-Cystine-D4?

DL-Cystine-D4 has the molecular formula C6H12N2O4S2 and a molecular weight of 244.3 g/mol. Its IUPAC name is 2-amino-3-[(2-amino-2-carboxy-1,1-dideuterioethyl)disulfanyl]-3,3-dideuteriopropanoic acid.

What is DL-Cystine-D4 used for?

DL-Cystine-D4 is supplied as a characterised reference material related to Acetylcysteine. 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 DL-Cystine-D4 can I order?

We supply DL-Cystine-D4 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 DL-Cystine-D4?

Yes. Every lot of DL-Cystine-D4 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-D4 be shipped internationally?

Yes. DL-Cystine-D4 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.