DL-Penicillamine
Also known as: (±)-Penicillamine, DL-beta-Mercaptovaline, DL-beta,beta-Dimethylcysteine, 3,3-Dimethyl-DL-cysteine, DL-2-Amino-3-mercapto-3-methylbutanoic acid, DL-β,β-Dimethylcysteine, DL-β-Mercaptovaline
DL-Penicillamine (CAS 52-66-4) is a compound in the Organic Bases category listed in the Jingsj chemical database. It has the molecular formula C5H11NO2S and a molecular weight of 149.211 g/mol. Key properties include a melting point of 208-212ºC, a boiling point of 251.8±35.0 °C at 760 mmHg, a density of 1.2±0.1 g/cm3 and a flash point of 106.1±25.9 °C. It is classified under GHS with signal word Warning and hazard statements H302 — Harmful if swallowed, H315 — Causes skin irritation and H319 — Causes serious eye irritation. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 52-66-4
- Jingsj CID
- J-16936-8
- Molecular Formula
- C5H11NO2S
- Molecular Weight
- 149.211 g/mol
- Category
- Organic Bases
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | 208-212ºC |
|---|---|
| Boiling Point | 251.8±35.0 °C at 760 mmHg |
| Density | 1.2±0.1 g/cm3 |
| Flash Point | 106.1±25.9 °C |
| Exact Mass | 149.051056 |
| PSA | 102.12000 |
| LogP | 0.93 |
| Vapor Pressure | 0.0±1.1 mmHg at 25°C |
| Refractive Index | 1.528 |
GHS Safety & Compliance
- H302 — Harmful if swallowed
- H315 — Causes skin irritation
- H319 — Causes serious eye irritation
- H335 — May cause respiratory irritation
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-Penicillamine?
The CAS number of DL-Penicillamine is 52-66-4.
What are the molecular formula and molecular weight of DL-Penicillamine?
DL-Penicillamine has molecular formula C5H11NO2S and molecular weight 149.211 g/mol.
Is DL-Penicillamine hazardous?
DL-Penicillamine has GHS signal word Warning and hazard statements H302 — Harmful if swallowed; H315 — Causes skin irritation; H319 — Causes serious eye irritation.
What are the upstream and downstream products of DL-Penicillamine?
For DL-Penicillamine, Upstream Products: L-Penicillamine, N-Acetyl-DL-penicillamine, Methanethiol; Downstream Products: (R)-5,5-Dimethylthiazolidine-4-carboxylic acid, 2-Mercaptoethanol, S-Nitroso-N-acetyl-DL-penicillamine.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "DL-Penicillamine (CAS 52-66-4)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-16936-8 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.