DL-3-(3,4-Dihydroxyphenyl)alanine

Also known as: DL-DOPA, 3,4-Dihydroxy-DL-phenylalanine, DL-3,4-Dihydroxyphenylalanine, 3-Hydroxy-DL-tyrosine, DL-Dihydroxyphenylalanine, DL-beta-(3,4-Dihydroxyphenyl)alanine, NSC 16940, DL-4,5-Dihydroxyphenylalanine

DL-3-(3,4-Dihydroxyphenyl)alanine (CAS 63-84-3) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C9H11NO4 and a molecular weight of 197.18800 g/mol. Key properties include a melting point of 270-272ºC(lit.), a boiling point of 448.39ºC at 760 mmHg, a density of 1.468 g/cm3 and a flash point of 224.978ºC. 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.: 63-84-3
Jingsj CID: J-5236-8
Molecular Formula: C₉H₁₁NO₄
Molecular Weight: 197.18800 g/mol
Category: Organic Acids
Last updated: 8/21/2026

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Physicochemical Properties

Melting Point	270-272ºC(lit.)
Boiling Point	448.39ºC at 760 mmHg
Density	1.468 g/cm3
Flash Point	224.978ºC
Exact Mass	197.06900
PSA	103.78000
LogP	0.75250

GHS Safety & Compliance

IrritantSignal word: Warning

H315 — Causes skin irritation
H319 — Causes serious eye irritation
H335 — May cause respiratory irritation

Activity & Biological Data

Target	Human Endogenous Metabolite
Additional Information	[1]. Yen HC, et al. Effects of various drugs on 3,4-dihydroxyphenylalanine (DL-DOPA)-induced excitation (agressive behavior) in mice. Toxicol Appl Pharmacol. 1970 Nov;17(3):597-604.

Frequently Asked Questions

What is the CAS number of DL-3-(3,4-Dihydroxyphenyl)alanine?

The CAS number of DL-3-(3,4-Dihydroxyphenyl)alanine is 63-84-3.

What are the molecular formula and molecular weight of DL-3-(3,4-Dihydroxyphenyl)alanine?

DL-3-(3,4-Dihydroxyphenyl)alanine has molecular formula C9H11NO4 and molecular weight 197.18800 g/mol.

Is DL-3-(3,4-Dihydroxyphenyl)alanine hazardous?

DL-3-(3,4-Dihydroxyphenyl)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 DL-3-(3,4-Dihydroxyphenyl)alanine?

For DL-3-(3,4-Dihydroxyphenyl)alanine, Upstream Products: Levodopa, Water, D-Tyrosine; Downstream Products: Levodopa, D-DOPA, 5,6-dihydroxy-1H-indole-2-carboxylic acid.

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

Last updated: 8/21/2026

How to cite: Jingsj. "DL-3-(3,4-Dihydroxyphenyl)alanine (CAS 63-84-3)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-5236-8 (accessed 2026-11-09).

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