L-Penicillamine
Also known as: (R)-2-amino-3-mercapto-3-methylbutanoic acid, 3-mercapto-L-valine, 3,3-dimethyl-L-cysteine, L-(+)-penicillamine, L-beta,beta-dimethylcysteine, L-beta-mercaptovaline, (2R)-2-amino-3-methyl-3-sulfanylbutanoic acid, L-β,β-dimethylcysteine, L-β-mercaptovaline, 3-sulfanyl-L-valine, H-Pen-OH
L-Penicillamine (CAS 1113-41-3) 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 206ºC (dec.), 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 H315 — Causes skin irritation, H319 — Causes serious eye irritation and H335 — May cause respiratory irritation. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 1113-41-3
- Jingsj CID
- J-1991836-6
- 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 | 206ºC (dec.) |
|---|---|
| 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
- 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 L-Penicillamine?
The CAS number of L-Penicillamine is 1113-41-3.
What are the molecular formula and molecular weight of L-Penicillamine?
L-Penicillamine has molecular formula C5H11NO2S and molecular weight 149.211 g/mol.
Is L-Penicillamine hazardous?
L-Penicillamine has GHS signal word Warning and hazard statements H315 — Causes skin irritation; H319 — Causes serious eye irritation; H335 — May cause respiratory irritation.
What are the upstream and downstream products of L-Penicillamine?
For L-Penicillamine, Upstream Products: S-Benzyl-D-penicillamine, 1-Propanol, Ethanol; Downstream Products: DL-Penicillamine, D-Valine, Ethylene glycol.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "L-Penicillamine (CAS 1113-41-3)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1991836-6 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.