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Phe-Arg

Also known as L-phenylalanyl-L-arginine, Phenylalanylarginine, phenylalanyl-arginine

CAS 1238-09-1Formula C15H23N5O3Molar mass 321.38 g/mol
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Phe-Arg chemical structure, C15H23N5O3, CAS 1238-09-1
2D chemical structure

Key facts

What buyers check first

All properties
CAS number
1238-09-1
Formula
C15H23N5O3
Molar mass
321.38 g/mol
HS code
292529
Category
Peptides

What is Phe-Arg?

Plain description, key identifiers and synonyms

Phe-Arg is a dipeptide composed of L-phenylalanine and L-arginine joined by a peptide linkage. It has a role as a metabolite. It is functionally related to a L-arginine and a L-phenylalanine. It is a conjugate base of a Phe-Arg(1+).

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
(2S)-2-[[(2S)-2-amino-3-phenylpropanoyl]amino]-5-(diaminomethylideneamino)pentanoic acid
CAS number
1238-09-1 CAS number cross-checked
Molecular formula
C15H23N5O3
InChIKey
OZILORBBPKKGRI-RYUDHWBXSA-N
InChI
InChI=1S/C15H23N5O3/c16-11(9-10-5-2-1-3-6-10)13(21)20-12(14(22)23)7-4-8-19-15(17)18/h1-3,5-6,11-12H,4,7-9,16H2,(H,20,21)(H,22,23)(H4,17,18,19)/t11-,12-/m0/s1
Canonical SMILES
NC(N)=NCCCC(NC(=O)C(N)Cc1ccccc1)C(=O)O
Isomeric SMILES
C1=CC=C(C=C1)C[C@@H](C(=O)N[C@@H](CCCN=C(N)N)C(=O)O)N

Synonyms

  • L-phenylalanyl-L-arginine
  • Phenylalanylarginine
  • phenylalanyl-arginine
  • FR dipeptide
  • F-R Dipeptide
  • (2S)-2-[[(2S)-2-amino-3-phenylpropanoyl]amino]-5-(diaminomethylideneamino)pentanoic acid
  • Phenylalanine Arginine dipeptide
  • Phenylalanine-Arginine dipeptide
  • L-Arginine, N2-L-phenylalanyl-
  • (2S)-2-(((2S)-2-amino-3-phenylpropanoyl)amino)-5-(diaminomethylideneamino)pentanoic acid
  • N2-Phenylalanylarginine
  • N2-L-Phenylalanyl-L-arginine
  • H-Phe-Arg-OH
  • h-Phe-arg-oh trifluoroacetate salt
  • H-Phe-Arg
  • L-Phe-L-Arg
  • N~2~-(2-Amino-1-hydroxy-3-phenylpropylidene)arginine
  • (S)-2-((S)-2-Amino-3-phenylpropanamido)-5-guanidinopentanoic acid
  • F-R

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

No measured properties are recorded for this substance yet. Ask suppliers for a technical data sheet.

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
321.38 g/molcalc.
Exact mass
321.1801 Dacalc.
LogP (octanol/water)
-0.82calc.
Topological polar surface area
156.8 Ųcalc.
Hydrogen bond donors
5calc.
Hydrogen bond acceptors
4calc.
Rotatable bonds
9calc.
Heavy atoms
23calc.
Rings
1calc.
Aromatic rings
1calc.
Fraction sp3 carbons
0.4calc.
Formal charge
0calc.
Stereocentres
2calc.
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

No GHS hazard classification is recorded for this substance yet. That does not mean it is harmless.

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

Phe-Arg suppliers

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Phe-Arg price

Indicative price range per kg from live supplier offers

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Uses and applications

What the substance is used for, by industry and function

Roles

  • metabolite

Regulatory status

Inventories, regulations and trade controls that list this substance

No regulatory list memberships are recorded for this substance yet. Always check the rules of the importing and exporting country before trade.

HS code and trade data

Customs classification and reported world trade statistics

Global trade

World import and export statistics for the HS code Phe-Arg is traded under.

HS 2925.29Indicative HS code

Imines and their derivatives, salts thereof, other

World exports in 2024
$1.8B
+12.4% vs 2023, imports $1.84B
2019 to 2024
Top exporters
  1. China35.9%
  2. France * partner reported15.5%
  3. Germany9.1%
Top importers
  1. United States13.3%
  2. China13.0%
  3. Brazil9.7%

* Partner reported figures, a lower bound.

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

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

Frequently asked questions

Quick answers about Phe-Arg, based on the data on this page

What is Phe-Arg?

Phe-Arg is a dipeptide composed of L-phenylalanine and L-arginine joined by a peptide linkage. It has a role as a metabolite. It is functionally related to a L-arginine and a L-phenylalanine. It is a conjugate base of a Phe-Arg(1+).

What is the CAS number of Phe-Arg?

The CAS registry number of Phe-Arg is 1238-09-1.

What is the molecular formula and weight of Phe-Arg?

The molecular formula of Phe-Arg is C15H23N5O3 and its molar mass is 321.38 g/mol.

What is Phe-Arg used for?

Known uses and roles of Phe-Arg include metabolite.

Is Phe-Arg hazardous?

No GHS hazard classification for Phe-Arg is recorded on CompoundList yet. That does not prove it is safe. Always read the supplier safety data sheet.

What is the HS code of Phe-Arg?

Phe-Arg is usually classified under HS code 292529 (Imines and their derivatives, salts thereof, other). This is indicative, confirm it with your customs broker before shipping.

Where can I buy Phe-Arg?

Post a free request on CompoundList and suppliers of Phe-Arg will send you quotes. Your contact details stay private until you accept a quote.

What is the price of Phe-Arg?

Suppliers quote Phe-Arg 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 Phe-Arg

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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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