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N-(tert-Butoxycarbonyl)-S-benzyl-L-cysteine

Also known as: Boc-S-Benzyl-L-cysteine, Boc-Cys(Bzl)-OH, N-Boc-S-benzyl-L-cysteine, S-Benzyl-N-(tert-butoxycarbonyl)-L-cysteine, t-butyloxycarbonyl-S-benzyl-L-cysteine, BOC-CYS(BZL)-OH, BOC-CYSTEINE(BZL)-OH, BOC-L-CYS(BZL)-OH, BOC-L-CYSTEINE(BENZYL), BOC-S-BENZYL-CYSTEINE, N-tert-butoxycarbonyl-S-benzylcysteine, S-benzyl N-Boc-cysteine, (R)-3-(Benzylthio)-2-((tert-butoxycarbonyl)amino)propanoic acid

N-(tert-Butoxycarbonyl)-S-benzyl-L-cysteine (CAS 5068-28-0) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C15H21NO4S and a molecular weight of 311.397 g/mol. Key properties include a melting point of 86-88 °C, a boiling point of 481.2±45.0 °C at 760 mmHg, a density of 1.2±0.1 g/cm3 and a flash point of 244.8±28.7 °C. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.
5068-28-0
Jingsj CID
J-8296-2
Molecular Formula
C15H21NO4S
Molecular Weight
311.397 g/mol
Category
Organic Acids
Last updated
8/21/2026
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Physicochemical Properties

Melting Point86-88 °C
Boiling Point481.2±45.0 °C at 760 mmHg
Density1.2±0.1 g/cm3
Flash Point244.8±28.7 °C
Exact Mass311.119141
PSA100.93000
LogP3.93
Vapor Pressure0.0±1.3 mmHg at 25°C
Refractive Index1.554

Activity & Biological Data

Additional Information[1]. Luckose F, et al. Effects of amino acid derivatives on physical, mental, and physiological activities. Crit Rev Food Sci Nutr. 2015;55(13):1793-807.

Customs & Trade Information

HS Code2930909090
Summary2930909090. other organo-sulphur compounds. VAT:17.0%. Tax rebate rate:13.0%. . MFN tariff:6.5%. General tariff:30.0%

Frequently Asked Questions

What is the CAS number of N-(tert-Butoxycarbonyl)-S-benzyl-L-cysteine?

The CAS number of N-(tert-Butoxycarbonyl)-S-benzyl-L-cysteine is 5068-28-0.

What are the molecular formula and molecular weight of N-(tert-Butoxycarbonyl)-S-benzyl-L-cysteine?

N-(tert-Butoxycarbonyl)-S-benzyl-L-cysteine has molecular formula C15H21NO4S and molecular weight 311.397 g/mol.

What are the upstream and downstream products of N-(tert-Butoxycarbonyl)-S-benzyl-L-cysteine?

For N-(tert-Butoxycarbonyl)-S-benzyl-L-cysteine, Upstream Products: S-Benzyl-L-cysteine, Di-tert-butyl dicarbonate, Benzyl bromide; Downstream Products: Boc-L-cysteine, N,N'-Bis(tert-butoxycarbonyl)-L-cystine, Boc-S-benzyl-L-cysteine N-hydroxysuccinimide ester.

Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.

Last updated:

How to cite: Jingsj. "N-(tert-Butoxycarbonyl)-S-benzyl-L-cysteine (CAS 5068-28-0)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-8296-2 (accessed 2026-11-09).

Data for reference only; verify product details with suppliers before purchase.