DL-Cystine
DL-胱氨酸
Also known as: Cystine, DL-, (H-DL-Cys-OH)2, 3,3'-Dithiobis(2-aminopropanoic acid), 2-Amino-3-[(2-amino-2-carboxyethyl)dithio]propanoic acid, DL-3,3′-Dithiobis(2-aminopropanoic acid), Bis(β-amino-β-carboxyethyl) disulfide, Gelucystine, Cystine (DL and meso-mixture)
DL-Cystine (CAS 923-32-0) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C6H12N2O4S2 and a molecular weight of 240.301 g/mol. It is also known as Cystine, DL-, (H-DL-Cys-OH)2 and 3,3'-Dithiobis(2-aminopropanoic acid). Key properties include a melting point of 227 °C (dec.)(lit.), a boiling point of 468.2±45.0 °C at 760 mmHg, a density of 1.6±0.1 g/cm3 and a flash point of 237.0±28.7 °C. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 923-32-0
- Jingsj CID
- J-32874-4
- Molecular Formula
- C6H12N2O4S2
- Chinese Name
- DL-胱氨酸
- Molecular Weight
- 240.301 g/mol
- Category
- Organic Acids
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | 227 °C (dec.)(lit.) |
|---|---|
| Boiling Point | 468.2±45.0 °C at 760 mmHg |
| Density | 1.6±0.1 g/cm3 |
| Flash Point | 237.0±28.7 °C |
| Exact Mass | 240.023849 |
| PSA | 177.24000 |
| LogP | 1.23 |
| Vapor Pressure | 0.0±2.5 mmHg at 25°C |
| Refractive Index | 1.653 |
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 Code | 2930909090 |
|---|---|
| Summary | 2930909090. 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 DL-Cystine?
The CAS number of DL-Cystine is 923-32-0.
What are the molecular formula and molecular weight of DL-Cystine?
DL-Cystine has molecular formula C6H12N2O4S2 and molecular weight 240.301 g/mol.
What are the upstream and downstream products of DL-Cystine?
For DL-Cystine, Upstream Products: L-Cystine; Downstream Products: hydrogen sulfide.
Data compiled from public chemical databases and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "DL-Cystine (CAS 923-32-0)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-32874-4 (accessed 2026-10-28).
Data for reference only; verify specifications, grades and regulatory status with suppliers before purchase.