L-4-Fluorophenylalanine

Also known as: 4-Fluoro-L-phenylalanine, p-Fluoro-L-phenylalanine, (S)-2-Amino-3-(4-fluorophenyl)propanoic acid, H-Phe(4-F)-OH, L-4-F-Phe-OH, 4-Fluoro-Phe-OH, MFCD00063064

L-4-Fluorophenylalanine (CAS 1132-68-9) 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 ~255 °C (dec.), 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. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 1132-68-9
Jingsj CID: J-45645-1
Molecular Formula: C₉H₁₀FNO₂
Molecular Weight: 183.180 g/mol
Category: Organic Acids
Last updated: 8/21/2026

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Physicochemical Properties

Melting Point	~255 °C (dec.)
Boiling Point	313.3±32.0 °C at 760 mmHg
Density	1.3±0.1 g/cm3
Flash Point	143.3±25.1 °C
Exact Mass	183.069550
PSA	63.32000
LogP	1.16
Vapor Pressure	0.0±0.7 mmHg at 25°C
Refractive Index	1.555

Activity & Biological Data

Additional Information	[1]. Luck LA, et al. Fluorescence and 19F NMR evidence that phenylalanine, 3-L-fluorophenylalanine and 4-L-fluorophenylalanine bind to the L-leucine specific receptor of Escherichia coli. Protein Sci. 2000;9(12):2573-2576. [2]. Hillas PJ, et al. A mechanism for hydroxylation by tyrosine hydroxylase based on partitioning of substituted phenylalanines. Biochemistry. 1996;35(22):6969-6975. [3]. Luck LA, et al. Fluorescence and 19F NMR evidence that phenylalanine, 3-L-fluorophenylalanine and 4-L-fluorophenylalanine bind to the L-leucine specific receptor of Escherichia coli. Protein Sci. 2000;9(12):2573-2576.

Additional Information

[1]. Luck LA, et al. Fluorescence and 19F NMR evidence that phenylalanine, 3-L-fluorophenylalanine and 4-L-fluorophenylalanine bind to the L-leucine specific receptor of Escherichia coli. Protein Sci. 2000;9(12):2573-2576. [2]. Hillas PJ, et al. A mechanism for hydroxylation by tyrosine hydroxylase based on partitioning of substituted phenylalanines. Biochemistry. 1996;35(22):6969-6975. [3]. Luck LA, et al. Fluorescence and 19F NMR evidence that phenylalanine, 3-L-fluorophenylalanine and 4-L-fluorophenylalanine bind to the L-leucine specific receptor of Escherichia coli. Protein Sci. 2000;9(12):2573-2576.

Frequently Asked Questions

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

The CAS number of L-4-Fluorophenylalanine is 1132-68-9.

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

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

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

For L-4-Fluorophenylalanine, Upstream Products: 4-Fluorocinnamic acid, 3-(4-Fluorophenyl)-2-oxopropanoic acid, DL-4-Fluorophenylalanine; Downstream Products: Boc-4-fluoro-L-phenylalanine, (R)-3-Amino-3-(4-fluorophenyl)propanoic acid, Z-4-Fluoro-Phe-OH.

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. "L-4-Fluorophenylalanine (CAS 1132-68-9)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-45645-1 (accessed 2026-11-09).

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