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DL-4-Fluorophenylalanine

Also known as: 4-Fluoro-DL-phenylalanine, 2-Amino-3-(4-fluorophenyl)propanoic acid, 2-Amino-3-(4-fluorophenyl)propionic Acid, DL-3-(4-Fluorophenyl)alanine, DL-4-F-Phe-OH, DL-4-Fluorophenylalanine,97%, DL-Phe(p-F), H-DL-Phe(4-F)-OH, MFCD00002600, Phenylalanine, 4-fluoro-, p-Fluoro-DL-phenylalanine, para-fluorophenylalanine, rac-(R*)-2-Amino-3-(4-fluorophenyl)-propionic acid, rac-(αR*)-α-Amino-4-fluorobenzenepropionic acid

DL-4-Fluorophenylalanine (CAS 51-65-0) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C9H10FNO2 and a molecular weight of 183.180 g/mol. Key properties include a melting point of 253-255ºC, a boiling point of 313.3±32.0 °C at 760 mmHg, a density of 1.3±0.1 g/cm3 and a flash point of 143.3±25.1 °C. It is classified under GHS with signal word Danger and hazard statements H300. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.
51-65-0
Jingsj CID
J-37189-1
Molecular Formula
C9H10FNO2
Molecular Weight
183.180 g/mol
Category
Organic Acids
Last updated
8/21/2026

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Physicochemical Properties

Melting Point253-255ºC
Boiling Point313.3±32.0 °C at 760 mmHg
Density1.3±0.1 g/cm3
Flash Point143.3±25.1 °C
Exact Mass183.069550
PSA63.32000
LogP1.16
Vapor Pressure0.0±0.7 mmHg at 25°C
Refractive Index1.555
StabilityStable. Combustible. Incompatible with strong oxidising agents. May be light sensitive.
Additional Propertyslightly soluble

GHS Safety & Compliance

Acute ToxicitySignal word: Danger
  • H300

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):1793-814.

Customs & Trade Information

HS Code2922499990
SummaryHS:2922499990 other amino-acids, other than those containing more than one kind of oxygen function, and their esters; salts thereof VAT:17.0% Tax rebate rate:9.0% Supervision conditions:AB(certificate of inspection for goods inward,certificate of inspection for goods outward) MFN tariff:6.5% General tariff:30.0%

Frequently Asked Questions

What is the CAS number of DL-4-Fluorophenylalanine?

The CAS number of DL-4-Fluorophenylalanine is 51-65-0.

What are the molecular formula and molecular weight of DL-4-Fluorophenylalanine?

DL-4-Fluorophenylalanine has molecular formula C9H10FNO2 and molecular weight 183.180 g/mol.

Is DL-4-Fluorophenylalanine hazardous?

DL-4-Fluorophenylalanine has GHS signal word Danger and hazard statements H300.

What are the upstream and downstream products of DL-4-Fluorophenylalanine?

For DL-4-Fluorophenylalanine, Upstream Products: N-Acetyl-DL-4-fluorophenylalanine; Downstream Products: 4-Fluoro-D-phenylalanine, Boc-4-fluoro-L-phenylalanine, L-4-Fluorophenylalanine.

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

Last updated:

How to cite: Jingsj. "DL-4-Fluorophenylalanine (CAS 51-65-0)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-37189-1 (accessed 2026-11-09).

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