Determine the necessary mass, volume, or concentration for preparing a solution.
≥98% for sensitive chromatographic and analytical workflows requiring minimal baseline interference.
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SDS, COA, datasheet, and spec sheet available for download. Lot-specific COA accessible via lot number lookup.
Cited in 31 peer-reviewed publications across chromatography, organic synthesis, and cross-coupling reactions.
Comprehensive hazard, handling, storage, and regulatory compliance document.
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View spec sheet →Taxonomy Tree
| Kingdom | Organic compounds |
|---|---|
| Superclass | Organic acids and derivatives |
| Class | Carboxylic acids and derivatives |
| Subclass | Amino acids, peptides, and analogues |
| Intermediate Tree Nodes | Amino acids and derivatives - Alpha amino acids and derivatives |
| Direct Parent | Cysteine 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 Framework | Aliphatic 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 |
| Description | This 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 |
Find and download the COA for your product by matching the lot number on the packaging.
| Lot Number | Certificate Type | Date | Item |
|---|---|---|---|
| Certificate of Analysis | May 22, 2026 | C103190 | |
| Certificate of Analysis | May 22, 2026 | C103190 | |
| Certificate of Analysis | May 22, 2026 | C103190 | |
| Certificate of Analysis | May 22, 2026 | C103190 | |
| Certificate of Analysis | May 22, 2026 | C103190 | |
| Certificate of Analysis | Apr 15, 2026 | C103190 | |
| Certificate of Analysis | Apr 01, 2026 | C103190 | |
| Certificate of Analysis | Mar 20, 2026 | C103190 | |
| Certificate of Analysis | Mar 18, 2026 | C103190 | |
| Certificate of Analysis | Mar 18, 2026 | C103190 | |
| Certificate of Analysis | Mar 18, 2026 | C103190 | |
| Certificate of Analysis | Apr 09, 2025 | C103190 | |
| Certificate of Analysis | Apr 03, 2025 | C103190 | |
| Certificate of Analysis | Apr 03, 2025 | C103190 | |
| Certificate of Analysis | May 28, 2022 | C103190 | |
| Certificate of Analysis | May 28, 2022 | C103190 | |
| Certificate of Analysis | May 28, 2022 | C103190 | |
| Certificate of Analysis | May 28, 2022 | C103190 |
| Melt Point(°C) | 265°C |
|---|---|
| Molecular Weight | 240.300 g/mol |
| XLogP3 | -6.300 |
| Hydrogen Bond Donor Count | 4 |
| Hydrogen Bond Acceptor Count | 8 |
| Rotatable Bond Count | 7 |
| Exact Mass | 240.024 Da |
| Monoisotopic Mass | 240.024 Da |
| Topological Polar Surface Area | 177.000 Ų |
| Heavy Atom Count | 14 |
| Formal Charge | 0 |
| Complexity | 192.000 |
| Isotope Atom Count | 0 |
| Defined Atom Stereocenter Count | 2 |
| Undefined Atom Stereocenter Count | 0 |
| Defined Bond Stereocenter Count | 0 |
| Undefined Bond Stereocenter Count | 0 |
| The total count of all stereochemical bonds | 0 |
| Covalently-Bonded Unit Count | 1 |