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Ethyl (2S,4R)-4-hydroxypyrrolidine-2-carboxylate hydrochloride

Also known as: H-Hyp-OEt·HCl, H-HYP-OET HCL, (2S,4R)-4-hydroxyproline ethyl ester hydrochloride, 4-trans-Hydroxy-L-proline ethyl ester hydrochloride, L-4-Hydroxyproline ethyl ester hydrochloride, trans-4-hydroxy-L-proline ethyl ester hydrochloride, ethyl (2S,4R)-4-hydroxypyrrolidine-2-carboxylate hydrochloride, EINECS 251-779-0

Ethyl (2S,4R)-4-hydroxypyrrolidine-2-carboxylate hydrochloride (CAS 33996-30-4) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C7H14ClNO3 and a molecular weight of 195.64400 g/mol. Key properties include a melting point of 150-153 °C, a boiling point of 297.2ºC at 760mmHg and a flash point of 133.5ºC. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.
33996-30-4
Jingsj CID
J-1173750-1
Molecular Formula
C7H14ClNO3
Molecular Weight
195.64400 g/mol
Category
Organic Acids
Last updated
8/21/2026
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Physicochemical Properties

Melting Point150-153 °C
Boiling Point297.2ºC at 760mmHg
Flash Point133.5ºC
Exact Mass195.06600
PSA58.56000
LogP0.40310

Customs & Trade Information

HS Code2933990090
Summary2933990090. 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 Ethyl (2S,4R)-4-hydroxypyrrolidine-2-carboxylate hydrochloride?

The CAS number of Ethyl (2S,4R)-4-hydroxypyrrolidine-2-carboxylate hydrochloride is 33996-30-4.

What are the molecular formula and molecular weight of Ethyl (2S,4R)-4-hydroxypyrrolidine-2-carboxylate hydrochloride?

Ethyl (2S,4R)-4-hydroxypyrrolidine-2-carboxylate hydrochloride has molecular formula C7H14ClNO3 and molecular weight 195.64400 g/mol.

What are the upstream and downstream products of Ethyl (2S,4R)-4-hydroxypyrrolidine-2-carboxylate hydrochloride?

For Ethyl (2S,4R)-4-hydroxypyrrolidine-2-carboxylate hydrochloride, Upstream Products: Ethanol, L-Hydroxyproline; Downstream Products: BOC-trans-4-hydroxy-L-prolinol, (2S,4S)-1-tert-Butoxycarbonyl-4-diphenylphosphino-2-(diphenylphosphinomethyl)pyrrolidine, (2S,4S)-(-)-4-Diphenylphosphino-2-(diphenylphosphinomethyl)pyrrolidine.

Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.

Last updated:

How to cite: Jingsj. "Ethyl (2S,4R)-4-hydroxypyrrolidine-2-carboxylate hydrochloride (CAS 33996-30-4)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1173750-1 (accessed 2026-11-09).

Data for reference only; verify product details with suppliers before purchase.