(S)-tert-Butyl 5-oxopyrrolidine-2-carboxylate
Also known as: tert-Butyl L-pyroglutamate, tert-Butyl (S)-5-oxopyrrolidine-2-carboxylate, tert-Butyl (S)-2-pyrrolidone-5-carboxylate, tert-Butyl 5-oxo-L-prolinate, 5-Oxo-L-proline tert-butyl ester, (2S)-tert-butyl 5-oxopyrrolidine-2-carboxylate, L-Pyr-OtBu, H-Pyr-OtBu
(S)-tert-Butyl 5-oxopyrrolidine-2-carboxylate (CAS 35418-16-7) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C9H15NO3 and a molecular weight of 185.22 g/mol. Key properties include a melting point of 102.0 to 108.0 °C, a boiling point of 319.2±35.0 °C at 760 mmHg, a density of 1.1±0.1 g/cm3 and a flash point of 146.8±25.9 °C. It is classified under GHS with signal word Warning and hazard statements 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.
- 35418-16-7
- Jingsj CID
- J-1975133-8
- Molecular Formula
- C9H15NO3
- Molecular Weight
- 185.22 g/mol
- Category
- Organic Acids
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | 102.0 to 108.0 °C |
|---|---|
| Boiling Point | 319.2±35.0 °C at 760 mmHg |
| Density | 1.1±0.1 g/cm3 |
| Flash Point | 146.8±25.9 °C |
| Exact Mass | 185.105194 |
| PSA | 55.40000 |
| LogP | -0.70 |
| Appearance | Powder | White |
| Vapor Pressure | 0.0±0.7 mmHg at 25°C |
| Refractive Index | 1.467 |
GHS Safety & Compliance
- H315 — Causes skin irritation
- H319 — Causes serious eye irritation
Customs & Trade Information
| HS Code | 2933790090 |
|---|---|
| Summary | 2933790090. other lactams. VAT:17.0%. Tax rebate rate:9.0%. . MFN tariff:9.0%. General tariff:20.0% |
Frequently Asked Questions
What is the CAS number of (S)-tert-Butyl 5-oxopyrrolidine-2-carboxylate?
The CAS number of (S)-tert-Butyl 5-oxopyrrolidine-2-carboxylate is 35418-16-7.
What are the molecular formula and molecular weight of (S)-tert-Butyl 5-oxopyrrolidine-2-carboxylate?
(S)-tert-Butyl 5-oxopyrrolidine-2-carboxylate has molecular formula C9H15NO3 and molecular weight 185.22 g/mol.
Is (S)-tert-Butyl 5-oxopyrrolidine-2-carboxylate hazardous?
(S)-tert-Butyl 5-oxopyrrolidine-2-carboxylate has GHS signal word Warning and hazard statements H315 — Causes skin irritation; H319 — Causes serious eye irritation.
What are the upstream and downstream products of (S)-tert-Butyl 5-oxopyrrolidine-2-carboxylate?
For (S)-tert-Butyl 5-oxopyrrolidine-2-carboxylate, Upstream Products: tert-Butyl acetate, L-Pyroglutamic acid, Isobutylene; Downstream Products: (2S,4R)-4-(4-fluorobenzyl)pyrrolidine-2-carboxylic acid, Di-tert-butyl (2S)-5-oxopyrrolidine-1,2-dicarboxylate, (2S,4R)-4-Benzyl-1-(tert-butoxycarbonyl)pyrrolidine-2-carboxylic acid.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "(S)-tert-Butyl 5-oxopyrrolidine-2-carboxylate (CAS 35418-16-7)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1975133-8 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.