trans-4-Hydroxy-D-proline
Also known as: H-D-Hyp-OH, (2R,4S)-4-Hydroxypyrrolidine-2-carboxylic acid, 4-hydroxy-D-proline, trans-D-4-hydroxyproline, trans-D-Hydroxyproline, D-Hydroxyproline
trans-4-Hydroxy-D-proline (CAS 3398-22-9) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C5H9NO3 and a molecular weight of 131.130 g/mol. Key properties include a melting point of 260°C, a boiling point of 355.2±42.0 °C at 760 mmHg, a density of 1.4±0.1 g/cm3 and a flash point of 168.6±27.9 °C. It is classified under GHS with signal word Danger 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.
- 3398-22-9
- Jingsj CID
- J-1072580-1
- Molecular Formula
- C5H9NO3
- Molecular Weight
- 131.130 g/mol
- Category
- Organic Acids
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | 260°C |
|---|---|
| Boiling Point | 355.2±42.0 °C at 760 mmHg |
| Density | 1.4±0.1 g/cm3 |
| Flash Point | 168.6±27.9 °C |
| Exact Mass | 131.058243 |
| PSA | 69.56000 |
| LogP | -1.84 |
| Vapor Pressure | 0.0±1.8 mmHg at 25°C |
| Refractive Index | 1.540 |
GHS Safety & Compliance
- H302 — Harmful if swallowed
- H315 — Causes skin irritation
- H319 — Causes serious eye irritation
- H334 — May cause allergy or asthma symptoms if inhaled
- H335 — May cause respiratory irritation
Customs & Trade Information
| HS Code | 2933990090 |
|---|---|
| Summary | 2933990090. heterocyclic compounds with nitrogen hetero-atom(s) only. VAT:17.0%. Tax rebate rate:13.0%. . MFN tariff:6.5%. General tariff:20.0% |
Frequently Asked Questions
What is the CAS number of trans-4-Hydroxy-D-proline?
The CAS number of trans-4-Hydroxy-D-proline is 3398-22-9.
What are the molecular formula and molecular weight of trans-4-Hydroxy-D-proline?
trans-4-Hydroxy-D-proline has molecular formula C5H9NO3 and molecular weight 131.130 g/mol.
Is trans-4-Hydroxy-D-proline hazardous?
trans-4-Hydroxy-D-proline has GHS signal word Danger and hazard statements H302 — Harmful if swallowed; H315 — Causes skin irritation; H319 — Causes serious eye irritation.
What are the upstream and downstream products of trans-4-Hydroxy-D-proline?
For trans-4-Hydroxy-D-proline, Downstream Products: trans-4-Hydroxy-D-proline methyl ester hydrochloride, Pyrrole-2-carboxylic acid, (2R,4S)-1-(tert-Butoxycarbonyl)-4-hydroxypyrrolidine-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. "trans-4-Hydroxy-D-proline (CAS 3398-22-9)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1072580-1 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.