≥96% for sensitive chromatographic and analytical workflows requiring minimal baseline interference.
Room temperature Ships Normal Check lot-specific COA for exact specifications.
SDS, COA, datasheet, and spec sheet available for download. Lot-specific COA accessible via lot number lookup.
Cited in 0 peer-reviewed publications across chromatography, organic synthesis, and cross-coupling reactions.
An important S-protected cysteine-derivative for the synthesis of peptides.
Application：
S-tert-butylmercapto-L-cysteine may be used to introduce synthetically useful S-tert-butylthio groups into peptides.
| Pubchem Sid | 488195975 |
|---|---|
| Canonical Smiles | CC(C)(C)SSCC(C(=O)O)N |
| IUPAC Name | (2R)-2-amino-3-(tert-butyldisulfanyl)propanoic acid |
| InChIKey | TWMBHZTWEDJDRC-YFKPBYRVSA-N |
| INCHI | 1S/C7H15NO2S2/c1-7(2,3)12-11-4-5(8)6(9)10/h5H,4,8H2,1-3H3,(H,9,10)/t5-/m0/s1 |
| Isomeric SMILES | CC(C)(C)SSC[C@@H](C(=O)O)N |
| WGK Germany | 3 |
| PubChem CID | 7006457 |
| Molecular Weight | 209.33 |
Comprehensive hazard, handling, storage, and regulatory compliance document.
Download SDS →Lot-specific quality data. Enter your lot number to retrieve the exact COA.
Look up COA →Full quality attributes and acceptance criteria for this grade.
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 | L-alpha-amino acids Quaternary ammonium salts Dialkyldisulfides Carboxylic acid salts Sulfenyl compounds Monocarboxylic acids and derivatives Carboxylic acids Organic zwitterions Organic salts Organic oxides Monoalkylamines Hydrocarbon derivatives Carbonyl compounds |
| Molecular Framework | Aliphatic acyclic compounds |
| Substituents | Cysteine or derivatives - Alpha-amino acid - L-alpha-amino acid - Quaternary ammonium salt - Carboxylic acid salt - Organic disulfide - Dialkyldisulfide - Carboxylic acid - Monocarboxylic acid or derivatives - Sulfenyl compound - Hydrocarbon derivative - Organosulfur compound - Organooxygen compound - Organonitrogen compound - Organic oxide - Organic nitrogen compound - Primary aliphatic amine - Organic oxygen compound - Carbonyl group - Amine - Organic zwitterion - Organic salt - 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 | Not available |
Find and download the COA for your product by matching the lot number on the packaging.
| Lot Number | Certificate Type | Date | Item |
|---|---|---|---|
 J2509044 | Certificate of Analysis | Oct 13, 2025 | S350813 |
| J2211329 | Certificate of Analysis | Jul 23, 2025 | S350813 |
| J2211330 | Certificate of Analysis | Jul 23, 2025 | S350813 |
| J2211331 | Certificate of Analysis | Jul 23, 2025 | S350813 |
| J2211332 | Certificate of Analysis | Jul 23, 2025 | S350813 |
| L2403161 | Certificate of Analysis | Jun 30, 2022 | S350813 |
| Melt Point(°C) | 190° C |
|---|---|
| Molecular Weight | 209.300 g/mol |
| XLogP3 | -1.700 |
| Hydrogen Bond Donor Count | 2 |
| Hydrogen Bond Acceptor Count | 5 |
| Rotatable Bond Count | 5 |
| Exact Mass | 209.054 Da |
| Monoisotopic Mass | 209.054 Da |
| Topological Polar Surface Area | 114.000 Ų |
| Heavy Atom Count | 12 |
| Formal Charge | 0 |
| Complexity | 156.000 |
| Isotope Atom Count | 0 |
| Defined Atom Stereocenter Count | 1 |
| 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 |
