3-(2-Thienyl)-DL-alanine

3-(2-噻吩基)-DL-丙氨酸

Also known as: 2-Thienyl-DL-alanine, DL-2-Thienylalanine, β-(2-Thienyl)-DL-alanine, 2-Amino-3-(2-thienyl)propionic acid, DL-2-Amino-3-(2-thienyl)propanoic acid, H-3-DL-Ala(2-thienyl)-OH, H-β-(2-Thienyl)-DL-Ala-OH, DL-β-(2-Thienyl)alanine, EINECS 217-967-1, MFCD00005459

3-(2-Thienyl)-DL-alanine (CAS 2021-58-1) is a compound in the Pharma Intermediates category listed in the Jingsj chemical database. It has the molecular formula C7H9NO2S and a molecular weight of 171.217 g/mol. It is also known as 2-Thienyl-DL-alanine, DL-2-Thienylalanine and β-(2-Thienyl)-DL-alanine. Key properties include a melting point of 275-277 °C (dec.)(lit.), a boiling point of 311.3±32.0 °C at 760 mmHg, a density of 1.3±0.1 g/cm3 and a flash point of 142.1±25.1 °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.
2021-58-1
Jingsj CID
J-27458-6
Molecular Formula
C7H9NO2S
Chinese Name
3-(2-噻吩基)-DL-丙氨酸
Molecular Weight
171.217 g/mol
Category
Pharma Intermediates
Last updated
8/21/2026

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Physicochemical Properties

Melting Point275-277 °C (dec.)(lit.)
Boiling Point311.3±32.0 °C at 760 mmHg
Density1.3±0.1 g/cm3
Flash Point142.1±25.1 °C
Exact Mass171.035400
PSA91.56000
LogP0.97
Vapor Pressure0.0±0.7 mmHg at 25°C
Refractive Index1.598

GHS Safety & Compliance

IrritantSignal word: Warning
  • H315 — Causes skin irritation
  • H319 — Causes serious eye irritation
  • H335 — May cause respiratory irritation

Activity & Biological Data

Additional Information[1]. Luckose F, et al. Effects of amino acid derivatives on physical, mental, and physiological activities. Crit Rev Food Sci Nutr. 2015;55(13):1793-1090.

Customs & Trade Information

HS Code2934999090
Summary2934999090. other heterocyclic compounds. 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 3-(2-Thienyl)-DL-alanine?

The CAS number of 3-(2-Thienyl)-DL-alanine is 2021-58-1.

What are the molecular formula and molecular weight of 3-(2-Thienyl)-DL-alanine?

3-(2-Thienyl)-DL-alanine has molecular formula C7H9NO2S and molecular weight 171.217 g/mol.

Is 3-(2-Thienyl)-DL-alanine hazardous?

3-(2-Thienyl)-DL-alanine 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 3-(2-Thienyl)-DL-alanine?

For 3-(2-Thienyl)-DL-alanine, Upstream Products: 2-Thiophenecarboxaldehyde, 2-(Chloromethyl)thiophene, 2-Thiophenemethanol; Downstream Products: Boc-3-(2-thienyl)-L-alanine, Boc-D-3-(2-thienyl)-alanine, 3-(2-Thienyl)-D-alanine.

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

Last updated:

How to cite: Jingsj. "3-(2-Thienyl)-DL-alanine (CAS 2021-58-1)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-27458-6 (accessed 2026-10-28).

Data for reference only; verify specifications, grades and regulatory status with suppliers before purchase.