D-Cystine - ≥98% , CAS No.349-46-2

CAS: 349-46-2 Cat. No.: C103190 Formula: C6H12N2O4S2 Molecular Weight: 240.3 Beilstein Registry Number: 1728093 EC Number: 206-486-2
AVAILABLE TO ORDER
GRADE & PURITY ≥98%
Synonyms
D-Cystine, 98% | C6H12N2O4S2 | Cystine DL-form | Ameziniummetilsulfat | NCGC00166007-01 | Z1269180278 | C-9760 | Niaprazine [INN:DCF] | DTXSID301031752 | NSC-203781 | D-CYSTINE [MI] | KX1RHN0Y0B | BP-13238 | (S,S)-3,3'-Dithiobis(2-aminopropionic acid) | F
Storage
Room temperature
Shipped In
Normal
★
Size
USA
Germany (EU)*
Price
Qty
250mg
C103190-250mg
3 In stock
—
$9.90
1g
C103190-1g
3 In stock
—
$16.90
5g
C103190-5g
3 In stock
—
$19.90
25g
C103190-25g
2 In stock
—
$39.90
100g
C103190-100g
2 In stock
—
$89.90
Enter a quantity for the sizes you want to add.
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Why this grade

≥98% for sensitive chromatographic and analytical workflows requiring minimal baseline interference.

🌡

Storage & shipping

Room temperature Ships Normal Check lot-specific COA for exact specifications.

📋

Quality documents

SDS, COA, datasheet, and spec sheet available for download. Lot-specific COA accessible via lot number lookup.

📚

Literature proof

Cited in 31 peer-reviewed publications across chromatography, organic synthesis, and cross-coupling reactions.

Overview

D-Cystine is the D-enantiomer of L-Cystine. D-Cystine inhibits L-aspartate-β-semialdehyde dehydrogenase (ASADH) from Escherichia coli.

Specifications

Synonyms
D-Cystine, 98% | C6H12N2O4S2 | Cystine DL-form | Ameziniummetilsulfat | NCGC00166007-01 | Z1269180278 | C-9760 | Niaprazine [INN:DCF] | DTXSID301031752 | NSC-203781 | D-CYSTINE [MI] | KX1RHN0Y0B | BP-13238 | (S,S)-3,3'-Dithiobis(2-aminopropionic acid) | F
Specifications & Purity
≥98%
Storage
Room temperature
Shipped In
Normal
Action Type
INHIBITOR
Purity
≥98%
Names and Identifiers
Pubchem Sid
Pubchem Sid Url
https://pubchem.ncbi.nlm.nih.gov/substance/504764320
Canonical Smiles
C(C(C(=O)O)N)SSCC(C(=O)O)N
IUPAC Name
(2S)-2-amino-3-[[(2S)-2-amino-2-carboxyethyl]disulfanyl]propanoic acid
InChIKey
LEVWYRKDKASIDU-QWWZWVQMSA-N
INCHI
1S/C6H12N2O4S2/c7-3(5(9)10)1-13-14-2-4(8)6(11)12/h3-4H,1-2,7-8H2,(H,9,10)(H,11,12)/t3-,4-/m1/s1
Isomeric SMILES
C([C@H](C(=O)O)N)SSC[C@H](C(=O)O)N
WGK Germany
1
UN Number
3265
Molecular Weight
240.3
Beilstein
1728093
Reaxy-Rn
1728091
Reaxys-RN_link_address
https://www.reaxys.com/reaxys/secured/hopinto.do?context=S&query=IDE.XRN=1728091&ln=

Documentation

📋 Safety Data Sheet (SDS)

Comprehensive hazard, handling, storage, and regulatory compliance document.

Download SDS →

✅ Certificate of Analysis (COA)

Lot-specific quality data. Enter your lot number to retrieve the exact COA.

Look up COA →

📊 Datasheet

Quick-reference summary of product specifications and applications.

View datasheet →

🔬 Specification Sheet

Full quality attributes and acceptance criteria for this grade.

View spec sheet →

Advanced Data

Taxonomic Classification

Taxonomy Tree

KingdomOrganic compounds
SuperclassOrganic acids and derivatives
ClassCarboxylic acids and derivatives
SubclassAmino acids, peptides, and analogues
Intermediate Tree Nodes Amino acids and derivatives - Alpha amino acids and derivatives
Direct ParentCysteine and derivatives
Alternative Parents D-alpha-amino acids  Dicarboxylic acids and derivatives  Dialkyldisulfides  Amino acids  Sulfenyl compounds  Carboxylic acids  Organopnictogen compounds  Organic oxides  Monoalkylamines  Hydrocarbon derivatives  Carbonyl compounds  
Molecular FrameworkAliphatic acyclic compounds
Substituents Cysteine or derivatives - Alpha-amino acid - D-alpha-amino acid - Dicarboxylic acid or derivatives - Organic disulfide - Dialkyldisulfide - Amino acid - Sulfenyl compound - Carboxylic acid - Organopnictogen compound - Organic nitrogen compound - Primary amine - Organosulfur compound - Organooxygen compound - Organonitrogen compound - Primary aliphatic amine - Organic oxygen compound - Carbonyl group - Hydrocarbon derivative - Amine - Organic oxide - Aliphatic acyclic compound
DescriptionThis compound belongs to the class of organic compounds known as cysteine and derivatives. These are compounds containing cysteine or a derivative thereof resulting from reaction of cysteine at the amino group or the carboxy group, or from the replacement of any hydrogen of glycine by a heteroatom.
External Descriptors cystine
3D Structure
Interactive Chemical Structure Model





Certificates(CoA,COO,BSE/TSE and Analysis Chart)
C of A & Other Certificates(BSE/TSE, COO):
Analytical Chart:

Find and download the COA for your product by matching the lot number on the packaging.

18 results found

Lot NumberCertificate TypeDateItem
H2611465Certificate of AnalysisMay 22, 2026 C103190
H2603304Certificate of AnalysisMay 22, 2026 C103190
H2603270Certificate of AnalysisMay 22, 2026 C103190
H2603269Certificate of AnalysisMay 22, 2026 C103190
H2603268Certificate of AnalysisMay 22, 2026 C103190
J1421008Certificate of AnalysisApr 15, 2026 C103190
C2625081Certificate of AnalysisApr 01, 2026 C103190
F2216153Certificate of AnalysisMar 20, 2026 C103190
F2216151Certificate of AnalysisMar 18, 2026 C103190
F2216150Certificate of AnalysisMar 18, 2026 C103190
F2216146Certificate of AnalysisMar 18, 2026 C103190
F2125089Certificate of AnalysisApr 09, 2025 C103190
F2125091Certificate of AnalysisApr 03, 2025 C103190
F2125090Certificate of AnalysisApr 03, 2025 C103190
F2216152Certificate of AnalysisMay 28, 2022 C103190
C2515064Certificate of AnalysisMay 28, 2022 C103190
G2403029Certificate of AnalysisMay 28, 2022 C103190
L2314059Certificate of AnalysisMay 28, 2022 C103190
Chemical and Physical Properties
Melt Point(°C)265°C
Molecular Weight240.300 g/mol
XLogP3-6.300
Hydrogen Bond Donor Count4
Hydrogen Bond Acceptor Count8
Rotatable Bond Count7
Exact Mass240.024 Da
Monoisotopic Mass240.024 Da
Topological Polar Surface Area177.000 Ų
Heavy Atom Count14
Formal Charge0
Complexity192.000
Isotope Atom Count0
Defined Atom Stereocenter Count2
Undefined Atom Stereocenter Count0
Defined Bond Stereocenter Count0
Undefined Bond Stereocenter Count0
The total count of all stereochemical bonds0
Covalently-Bonded Unit Count1
Citations of This Product
Solution Calculators
Reviews

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