Boc-Cys-OH - for chiral derivatization, ≥98.5% , CAS No.20887-95-0

CAS: 20887-95-0 Cat. No.: B132555 Molecular Weight: 221.27 Beilstein Registry Number: 2450705
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GRADE & PURITY for chiral derivatization ? Chiral-derivatization grade — reagents to form diastereomers for enantiomer separation. Use to resolve and quantify chiral compounds by chromatography. ≥98.5%
Synonyms
Boc-L-cysteine|20887-95-0|Boc-Cys-OH|N-Boc-L-Cysteine|(R)-2-((TERT-BUTOXYCARBONYL)AMINO)-3-MERCAPTOPROPANOIC ACID|N-tert-Butyloxycarbonylcysteine|(2R)-2-[(2-methylpropan-2-yl)oxycarbonylamino]-3-sulfanylpropanoic acid|N-ALPHA-T-BUTYLOXYCARBONYL-L-CYSTEINE
Storage
Room temperature
Shipped In
Normal
 ·  off list, applied to all prices below.
Size
Status
Price
Qty
250mg
B132555-250mg
4

$176.90

$206.90
Save $30.00 (14.50%)
1g
B132555-1g
3

$588.90

$687.90
Save $99.00 (14.39%)
Enter a quantity for the sizes you want to add.
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Why this grade

for chiral derivatization, ≥98.5% for chiral derivatization 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 0 peer-reviewed publications across chromatography, organic synthesis, and cross-coupling reactions.

Overview

Boc-L-cysteine (Boc-Cys-OH) is a high performance liquid chromatography (HPLC) grade chromatographic solvent
Boc-L-cysteine (Boc-Cys-OH) can may be used as a chromatographic solvent, in an experimental study done to study the biosynthesis of S-(3-hexan-1-ol)-glutathione (3MH-S-glut) and S-(3-hexan-l-ol)-L-cysteine (3MH-S-cys), which act as flavour precursors in wines, in Vitis vinifera grapes exposed to various environmental stress.

Specifications

Synonyms
Boc-L-cysteine | 20887-95-0 | Boc-Cys-OH | N-Boc-L-Cysteine | (R)-2-((TERT-BUTOXYCARBONYL)AMINO)-3-MERCAPTOPROPANOIC ACID | N-tert-Butyloxycarbonylcysteine | (2R)-2-[(2-methylpropan-2-yl)oxycarbonylamino]-3-sulfanylpropanoic acid | N-ALPHA-T-BUTYLOXYCARBONYL-L-CYSTEINE
Specifications & Purity
for chiral derivatization, ≥98.5%
Storage
Room temperature
Shipped In
Normal
Grade
for chiral derivatization
Purity
≥98.5%
Names and Identifiers
Canonical SmilesCC(C)(C)OC(=O)NC(CS)C(=O)O
IUPAC Name(2R)-2-[(2-methylpropan-2-yl)oxycarbonylamino]-3-sulfanylpropanoic acid
InChIKeyATVFTGTXIUDKIZ-YFKPBYRVSA-N
INCHI1S/C8H15NO4S/c1-8(2,3)13-7(12)9-5(4-14)6(10)11/h5,14H,4H2,1-3H3,(H,9,12)(H,10,11)/t5-/m0/s1
Isomeric SMILES CC(C)(C)OC(=O)N[C@@H](CS)C(=O)O
WGK Germany 3
Molecular Weight 221.27
Beilstein 2450705
Reaxy-Rn 2450705
Reaxys-RN_link_address https://www.reaxys.com/reaxys/secured/hopinto.do?context=S&query=IDE.XRN=2450705&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 Carbamate esters  Organic carbonic acids and derivatives  Monocarboxylic acids and derivatives  Carboxylic acids  Alkylthiols  Organopnictogen compounds  Organonitrogen compounds  Organic oxides  Hydrocarbon derivatives  Carbonyl compounds  
Molecular FrameworkAliphatic acyclic compounds
Substituents Cysteine or derivatives - Carbamic acid ester - Carbonic acid derivative - Alkylthiol - Carboxylic acid - Monocarboxylic acid or derivatives - Organic nitrogen compound - Hydrocarbon derivative - Organosulfur compound - Organooxygen compound - Organonitrogen compound - Organic oxide - Organopnictogen compound - Organic oxygen compound - Carbonyl group - 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.

4 results found

Lot NumberCertificate TypeDateItem
G2311612Certificate of AnalysisApr 08, 2025 B132555
G2311613Certificate of AnalysisApr 08, 2025 B132555
G2311619Certificate of AnalysisApr 08, 2025 B132555
G2311628Certificate of AnalysisApr 08, 2025 B132555
Chemical and Physical Properties
Melt Point(°C)68 °C
Molecular Weight221.280 g/mol
XLogP30.800
Hydrogen Bond Donor Count3
Hydrogen Bond Acceptor Count5
Rotatable Bond Count5
Exact Mass221.072 Da
Monoisotopic Mass221.072 Da
Topological Polar Surface Area76.600 Ų
Heavy Atom Count14
Formal Charge0
Complexity224.000
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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