S-Butyl-D-cysteine
S-丁基-D-半胱氨酸
Also known as: (R)-2-Amino-3-(butylthio)propanoic acid, (2R)-2-Amino-3-butylsulfanylpropanoic acid, H-Cys(butyl)-OH, S-Butyl-D-cysteine USP/EP/BP
S-Butyl-D-cysteine (CAS 4134-56-9) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C7H15NO2S and a molecular weight of 177.26400 g/mol. It is also known as (R)-2-Amino-3-(butylthio)propanoic acid, (2R)-2-Amino-3-butylsulfanylpropanoic acid and H-Cys(butyl)-OH. Key properties include a boiling point of 267.6ºC at 760 mmHg, a density of 1.092 g/cm3 and a flash point of 115.6ºC. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 4134-56-9
- Jingsj CID
- J-1078369-4
- Molecular Formula
- C7H15NO2S
- Chinese Name
- S-丁基-D-半胱氨酸
- Molecular Weight
- 177.26400 g/mol
- Category
- Organic Acids
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Boiling Point | 267.6ºC at 760 mmHg |
|---|---|
| Density | 1.092 g/cm3 |
| Flash Point | 115.6ºC |
Frequently Asked Questions
What is the CAS number of S-Butyl-D-cysteine?
The CAS number of S-Butyl-D-cysteine is 4134-56-9.
What are the molecular formula and molecular weight of S-Butyl-D-cysteine?
S-Butyl-D-cysteine has molecular formula C7H15NO2S and molecular weight 177.26400 g/mol.
Data compiled from public chemical databases and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "S-Butyl-D-cysteine (CAS 4134-56-9)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1078369-4 (accessed 2026-10-25).
Data for reference only; verify specifications, grades and regulatory status with suppliers before purchase.