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Peptides

Arg-Ser

Also known as arginylserine, RS dipeptide, R-S Dipeptide

CAS 70921-62-9Formula C9H19N5O4Molar mass 261.28 g/mol
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Arg-Ser chemical structure, C9H19N5O4, CAS 70921-62-9
2D chemical structure

Key facts

What buyers check first

All properties
CAS number
70921-62-9
Formula
C9H19N5O4
Molar mass
261.28 g/mol
HS code
292529
Category
Peptides

What is Arg-Ser?

Plain description, key identifiers and synonyms

Arg-Ser is a dipeptide formed from L-arginine and L-serine residues. It has a role as a metabolite.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
(2S)-2-[[(2S)-2-amino-5-(diaminomethylideneamino)pentanoyl]amino]-3-hydroxypropanoic acid
CAS number
70921-62-9
Molecular formula
C9H19N5O4
InChIKey
IJYZHIOOBGIINM-WDSKDSINSA-N
InChI
InChI=1S/C9H19N5O4/c10-5(2-1-3-13-9(11)12)7(16)14-6(4-15)8(17)18/h5-6,15H,1-4,10H2,(H,14,16)(H,17,18)(H4,11,12,13)/t5-,6-/m0/s1
Canonical SMILES
NC(N)=NCCCC(N)C(=O)NC(CO)C(=O)O
Isomeric SMILES
C(C[C@@H](C(=O)N[C@@H](CO)C(=O)O)N)CN=C(N)N

Synonyms

  • arginylserine
  • RS dipeptide
  • R-S Dipeptide
  • Arginine Serine dipeptide
  • Arginine-Serine dipeptide
  • N-Arginylserine
  • N-L-Arginyl-L-serine
  • Arginyl-Serine
  • H-Arg-Ser-OH
  • L-arginyl-L-serine
  • (2S)-2-[[(2S)-2-amino-5-(diaminomethylideneamino)pentanoyl]amino]-3-hydroxypropanoic acid
  • L-Arg-L-Ser

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
261.28 g/molcalc.
Exact mass
261.1437 Dacalc.
LogP (octanol/water)
-3.07calc.
Topological polar surface area
177.1 Ųcalc.
Hydrogen bond donors
6calc.
Hydrogen bond acceptors
5calc.
Rotatable bonds
8calc.
Heavy atoms
18calc.
Rings
0calc.
Aromatic rings
0calc.
Fraction sp3 carbons
0.67calc.
Formal charge
0calc.
Stereocentres
2calc.
Lipinski rule of five
Passes (1 violation)calc.

Calculated for screening. Confirm critical figures with the supplier.

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.

Arg-Ser suppliers

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Arg-Ser price

Indicative price range per kg from live supplier offers

No published prices right now

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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 Arg-Ser 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 Arg-Ser is indicative (it was assigned by structure rules). Confirm the classification with your customs broker before shipping.

Frequently asked questions

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

What is Arg-Ser?

Arg-Ser is a dipeptide formed from L-arginine and L-serine residues. It has a role as a metabolite.

What is the CAS number of Arg-Ser?

The CAS registry number of Arg-Ser is 70921-62-9.

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

The molecular formula of Arg-Ser is C9H19N5O4 and its molar mass is 261.28 g/mol.

What is Arg-Ser used for?

Known uses and roles of Arg-Ser include metabolite.

Is Arg-Ser hazardous?

No GHS hazard classification for Arg-Ser 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 Arg-Ser?

Arg-Ser 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 Arg-Ser?

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

What is the price of Arg-Ser?

Suppliers quote Arg-Ser 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 Arg-Ser

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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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