boc-S-tert-butylmercapto-L-cysteine - ≥99% , CAS No.30044-61-2

CAS: 30044-61-2 Cat. No.: B133365 Molecular Weight: 309.45 Beilstein Registry Number: 1982924 EC Number: 250-013-2
AVAILABLE TO ORDER
GRADE & PURITY ≥99%
Synonyms
AS-73037 | (2R)-2-{[(tert-butoxy)carbonyl]amino}-3-(tert-butyldisulfanyl)propanoic acid | W-106962 | AKOS024373593 | N-(tert-butoxycarbonyl)-L-Cystine | AMY22132 | Boc-L-Cys(StBu)-OH | Boc-S-tert-butylmercapto-L-cysteine | Boc-Cys(StBu)-OH (Boc-L-Cys(StBu
Storage
Room temperature
Shipped In
Normal
 ·  off list, applied to all prices below.
Size
Status
Price
Qty
1g
B133365-1g
5
$91.90
5g
B133365-5g
1
$354.90
Enter a quantity for the sizes you want to add.
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Why this grade

≥99% for sensitive chromatographic and analytical workflows requiring minimal baseline interference.

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Storage & shipping

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

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Quality documents

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

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Literature proof

Cited in 0 peer-reviewed publications across chromatography, organic synthesis, and cross-coupling reactions.

Specifications

Synonyms
AS-73037 | (2R)-2-{[(tert-butoxy)carbonyl]amino}-3-(tert-butyldisulfanyl)propanoic acid | W-106962 | AKOS024373593 | N-(tert-butoxycarbonyl)-L-Cystine | AMY22132 | Boc-L-Cys(StBu)-OH | Boc-S-tert-butylmercapto-L-cysteine | Boc-Cys(StBu)-OH (Boc-L-Cys(StBu
Specifications & Purity
≥99%
Storage
Room temperature
Shipped In
Normal
Purity
≥99%
Names and Identifiers
Pubchem Sid488198621
Pubchem Sid Urlhttps://pubchem.ncbi.nlm.nih.gov/substance/488198621
Canonical SmilesCC(C)(C)OC(=O)NC(CSSC(C)(C)C)C(=O)O
IUPAC Name(2R)-3-(tert-butyldisulfanyl)-2-[(2-methylpropan-2-yl)oxycarbonylamino]propanoic acid
InChIKeyPPQRALRLGBAWHD-QMMMGPOBSA-N
INCHI1S/C12H23NO4S2/c1-11(2,3)17-10(16)13-8(9(14)15)7-18-19-12(4,5)6/h8H,7H2,1-6H3,(H,13,16)(H,14,15)/t8-/m0/s1
Isomeric SMILES CC(C)(C)OC(=O)N[C@@H](CSSC(C)(C)C)C(=O)O
WGK Germany 3
Molecular Weight 309.45
Beilstein 1982924
Reaxy-Rn 2381109
Reaxys-RN_link_address https://www.reaxys.com/reaxys/secured/hopinto.do?context=S&query=IDE.XRN=2381109&ln=

Documentation

📋 Safety Data Sheet (SDS)

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

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✅ Certificate of Analysis (COA)

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

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📊 Datasheet

Quick-reference summary of product specifications and applications.

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🔬 Specification Sheet

Full quality attributes and acceptance criteria for this grade.

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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 Carbamate esters  Dialkyldisulfides  Sulfenyl compounds  Monocarboxylic acids and derivatives  Carboxylic acids  Organonitrogen compounds  Organic oxides  Hydrocarbon derivatives  Carbonyl compounds  
Molecular FrameworkAliphatic acyclic compounds
Substituents Cysteine or derivatives - Carbamic acid ester - Dialkyldisulfide - Organic disulfide - Sulfenyl compound - Monocarboxylic acid or derivatives - Carboxylic acid - Organic oxide - Organic nitrogen compound - Hydrocarbon derivative - Organosulfur compound - Organooxygen compound - Organonitrogen compound - Carbonyl group - Organic oxygen compound - 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 Not available
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.

6 results found

Lot NumberCertificate TypeDateItem
J2327037Certificate of AnalysisAug 11, 2025 B133365
J2327038Certificate of AnalysisAug 11, 2025 B133365
C2314374Certificate of AnalysisDec 10, 2024 B133365
B2318975Certificate of AnalysisDec 10, 2024 B133365
J2122604Certificate of AnalysisAug 21, 2023 B133365
B2318974Certificate of AnalysisNov 08, 2022 B133365
Chemical and Physical Properties
Specific Rotation[α][α]20/D −153±3°, c = 2% in methanol
Melt Point(°C)117-119 °C
Molecular Weight309.500 g/mol
XLogP32.200
Hydrogen Bond Donor Count2
Hydrogen Bond Acceptor Count6
Rotatable Bond Count8
Exact Mass309.107 Da
Monoisotopic Mass309.107 Da
Topological Polar Surface Area126.000 Ų
Heavy Atom Count19
Formal Charge0
Complexity321.000
Isotope Atom Count0
Defined Atom Stereocenter Count1
Undefined Atom Stereocenter Count0
Defined Bond Stereocenter Count0
Undefined Bond Stereocenter Count0
The total count of all stereochemical bonds0
Covalently-Bonded Unit Count1
Documents & Articles
Solution Calculators
Reviews

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