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Amino acids and derivatives

p-Fluorophenylalanine

Also known as Alnasid, dl-4-Fluorophenylalanine, D,L-Fluorophenylalanine

CAS 51-65-0Formula C9H10FNO2Molar mass 183.18 g/molEC 200-113-7
GHS signal word: Danger. Pictograms: Acute toxicity (severe) 25 suppliers listed
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p-Fluorophenylalanine chemical structure, C9H10FNO2, CAS 51-65-0
2D chemical structure

Key facts

What buyers check first

All properties
Physical form
Powder
Melting point
253 to 255
Solubility
Less than 1 mg/mL at 70 °F
HS code
292249
Category
Amino acids and derivatives
UN number
UN 2811
Illustrative photo, 25 kg white woven sacks of powder on a pallet in a warehouse
Typical packagingIllustrative packaging image, not the actual product

What is p-Fluorophenylalanine?

Plain description, key identifiers and synonyms

4-fluorophenylalanine is a phenylalanine derivative in which the hydrogen at position 4 on the benzene ring is replaced by a fluoro group. It is a fluoroamino acid, a phenylalanine derivative, a member of monofluorobenzenes and a non-proteinogenic alpha-amino acid.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
2-amino-3-(4-fluorophenyl)propanoic acid
CAS number
51-65-0 CAS number cross-checkedOther or deprecated CAS: 60-17-3
EC numbers
200-113-7, 200-459-9
Molecular formula
C9H10FNO2
UNII
42T8578M1E
MDL number
MFCD00002600
InChIKey
XWHHYOYVRVGJJY-UHFFFAOYSA-N
InChI
InChI=1S/C9H10FNO2/c10-7-3-1-6(2-4-7)5-8(11)9(12)13/h1-4,8H,5,11H2,(H,12,13)
SMILES (canonical and isomeric)
C1=CC(=CC=C1CC(C(=O)O)N)F

Synonyms

  • Alnasid
  • dl-4-Fluorophenylalanine
  • D,L-Fluorophenylalanine
  • D,L-p-Fluorophenylalanine
  • DL-Phenylalanine, 4-fluoro-
  • Phenylalanine, 4-fluoro-
  • Alanine, 3-(p-fluorophenyl)-, dl-
  • 4-Fluorophenylalanine, dl-
  • p Fluorophenylalanine
  • 4 Fluorophenylalanine
  • Fluorophenylalanine, p
  • para Fluorophenylalanine
  • Para-Fluorophenylalanine
  • 4-Fluoro-dl-phenylalanine
  • p-Fluoro-dl-phenylalanine
  • 2-amino-3-(4-fluorophenyl)propanoic acid
  • DL-p-Fluorophenylalanine
  • DL-3-(4-Fluorophenyl)alanine
  • 4-Fluoro-DL-beta-phenylalanine
  • d-4-Fluorophe
  • 4-Fluoro-dl-para-phenylalanine
  • h-p-fluoro-dl-phe-oh
  • h-dl-phe(4-f)-oh
  • Alanine, 3-(p-fluorophenyl)-
  • DL-p-phenylalanine
Show all 36 synonyms
  • DL-Fluorophenylalanine
  • 2-Amino-3-(4-fluorophenyl)propanoicacid
  • 4-Fluorophenylalanine #
  • 2-Amino-3-(4-fluorophenyl)propionic Acid
  • dl-(4-Fluorophenyl)alanine
  • H-D-PHE(P-F)-OH
  • h-p-Fluoro-d-phe-oh
  • DivK1c_000957
  • L-3-(4-Fluorophenyl)alanine
  • dl-beta-p-Fluorophenylalanine
  • p-Fluorophenylalanine, dl-

Physical and chemical properties

Measured values and descriptors computed from the structure

Physical and chemical properties

Measured values, check the supplier specification for your grade

Physical form
Powderexp.
Melting point
253 to 255exp.
Solubility
Less than 1 mg/mL at 70 °Fexp.

Values vary by grade. Ask suppliers for the COA or TDS of the batch you buy.

Computed descriptors

Calculated from the structure, useful for screening and formulation

Molecular weight
183.18 g/molcalc.
Exact mass
183.0696 Dacalc.
LogP (octanol/water)
0.78calc.
Topological polar surface area
63.32 Ųcalc.
Hydrogen bond donors
2calc.
Hydrogen bond acceptors
2calc.
Rotatable bonds
3calc.
Heavy atoms
13calc.
Rings
1calc.
Aromatic rings
1calc.
Fraction sp3 carbons
0.22calc.
Formal charge
0calc.
Stereocentres
1calc.
Lipinski rule of five
Passes (0 violations)calc.

Calculated for screening. Confirm critical figures with the supplier.

Murcko scaffold

The ring system that remains when every side chain is removed

Murcko scaffold of this chemical, c1ccccc1

c1ccccc1

1 ring, 6 atoms, the Benzene ring system.

485,677 other chemicals share this scaffold

Safety and hazards

GHS classification summary, not a safety data sheet

GHS signal word
Danger
GHS06: Acute toxicity (severe)
Acute toxicity (severe)

Hazard statements

  • H300Fatal if swallowed.
Precautionary statements (7)
  • P264Wash skin thoroughly after handling.
  • P270Do not eat, drink or smoke when using this product.
  • P301 + P316If swallowed: Get emergency medical help immediately.
  • P321Specific treatment (see supplemental first aid instructions on the label).
  • P330Rinse mouth.
  • P405Store locked up.
  • P501Dispose of contents and container in accordance with local regulations.
UN number
UN 2811

GHS classification summary, not a safety data sheet (SDS). Classifications can differ by supplier, grade and concentration. Always check the supplier's SDS.

Full safety data and first aid

p-Fluorophenylalanine suppliers

Sponsored listings first, then the documented ranking: membership, verification, replies, completeness, freshness and ratings

All 25 suppliers
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Where suppliers are based

25 suppliers in 7 countries

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p-Fluorophenylalanine price

Indicative price range per kg from live supplier offers

No published prices right now

Suppliers quote this chemical on request. Send one free request and compare quotes side by side.

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Uses and applications

What the substance is used for, by industry and function

Production of synthetic L-phenylalanine.

Regulatory status

Inventories, regulations and trade controls that list this substance

United States

  • TSCA inventory (USA)
    Status: Inactive in US commerce

HS code and trade data

Customs classification and reported world trade statistics

Global trade

World import and export statistics for the HS code p-Fluorophenylalanine is traded under.

HS 2922.49Indicative HS code

Amino-acids, other than those containing more than one kind of oxygen function, and…

World exports in 2024
$3.88B
−11.5% vs 2023, imports $3.87B
2019 to 2024
Top exporters
  1. China38.7%
  2. India * partner reported8.3%
  3. Germany8.1%
Top importers
  1. United States13.4%
  2. Germany11.1%
  3. Japan6.6%

* Partner reported figures, a lower bound.

Reported customs values in USD, not prices.Full trade data

The HS code shown for p-Fluorophenylalanine is indicative (it was assigned by structure rules). Confirm the classification with your customs broker before shipping.

Frequently asked questions

Quick answers about p-Fluorophenylalanine, based on the data on this page

What is p-Fluorophenylalanine?

4-fluorophenylalanine is a phenylalanine derivative in which the hydrogen at position 4 on the benzene ring is replaced by a fluoro group. It is a fluoroamino acid, a phenylalanine derivative, a member of monofluorobenzenes and a non-proteinogenic alpha-amino acid.

What is the CAS number of p-Fluorophenylalanine?

The CAS registry number of p-Fluorophenylalanine is 51-65-0. Other or deprecated CAS numbers: 60-17-3.

What is the molecular formula and weight of p-Fluorophenylalanine?

The molecular formula of p-Fluorophenylalanine is C9H10FNO2 and its molar mass is 183.18 g/mol.

What is p-Fluorophenylalanine used for?

Production of synthetic L-phenylalanine.

Is p-Fluorophenylalanine hazardous?

p-Fluorophenylalanine carries the GHS signal word "Danger". Main hazards: fatal if swallowed. This summary is not an SDS, always read the supplier safety data sheet.

What is the HS code of p-Fluorophenylalanine?

p-Fluorophenylalanine is usually classified under HS code 292249 (Amino-acids, other than those containing more than one kind of oxygen function, and…). This is indicative, confirm it with your customs broker before shipping.

Where can I buy p-Fluorophenylalanine?

CompoundList lists 25 suppliers of p-Fluorophenylalanine in China, United States, Canada, Germany and 3 more. Send one free request to get and compare quotes. Your contact details stay private until you accept a quote.

What is the price of p-Fluorophenylalanine?

Suppliers quote p-Fluorophenylalanine on request because prices depend on grade, purity, quantity and destination. A free request on CompoundList gets you several quotes to compare.

Guides for buyers

Practical guides that help when you source, ship or handle p-Fluorophenylalanine

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Data last updated 7 Oct 2026. Details may have changed, please confirm them with the supplier. Report an error on this page
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