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Aromatic building blocks

Carbarsone

Also known as Carbarson, Pentarsone, Ameban

CAS 121-59-5Formula C7H9AsN2O4Molar mass 260.08 g/molEC 204-484-6
GHS signal word: Danger. Pictograms: Acute toxicity (severe), Hazardous to the environment 1 supplier listed
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Carbarsone chemical structure, C7H9AsN2O4, CAS 121-59-5
2D chemical structure

Key facts

What buyers check first

All properties
Physical form
Powder
Melting point
173.9 °C
Solubility
1 to 10 mg/mL at 71.1 °F
HS code
293190
Category
Aromatic building blocks
UN number
UN 3280
Illustrative photo, assorted laboratory chemical bottles and jars on a laboratory bench
Typical packagingIllustrative packaging image, not the actual product

What is Carbarsone?

Plain description, key identifiers and synonyms

[4-(carbamoylamino)phenyl]arsonic acid is a member of ureas.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
[4-(carbamoylamino)phenyl]arsonic acid
CAS number
121-59-5 CAS number cross-checked
EC number
204-484-6
Molecular formula
C7H9AsN2O4
UNII
8PK70TXE1T
InChIKey
WWXBHTZSYYGCSG-UHFFFAOYSA-N
InChI
InChI=1S/C7H9AsN2O4/c9-7(11)10-6-3-1-5(2-4-6)8(12,13)14/h1-4H,(H3,9,10,11)(H2,12,13,14)
SMILES (canonical and isomeric)
C1=CC(=CC=C1NC(=O)N)[As](=O)(O)O

Synonyms

  • Carbarson
  • Pentarsone
  • Ameban
  • N-Carbamoylarsanilic acid
  • [4-(carbamoylamino)phenyl]arsonic acid
  • Arsanilic acid, N-carbamoyl-
  • Carbasone
  • Benzenearsonic acid, p-ureido-
  • 4-Ureidobenzenearsonic acid
  • Arsonic acid, (4-((aminocarbonyl)amino)phenyl)-
  • Arsonic acid, [4-[(aminocarbonyl)amino]phenyl]-
  • (4-(carbamoylamino)phenyl)arsonic acid
  • Carbason
  • Amebarsone
  • Aminarson
  • Arsambide
  • Fenarsone
  • Amabevan
  • Amebarsene
  • Amibiarson
  • Aminarsone
  • Histocarb
  • Leucarsone
  • p-Arsonophenylurea
  • Aminoarson
Show all 38 synonyms
  • p-Ureidobenzenearsonic acid
  • Kutan
  • Carb-O-Sep
  • 4-Ureidophenylarsonic acid
  • p-Carbamidobenzenearsonic acid
  • N-Carbamyl arsanilic acid
  • 4-Carbamylaminophenylarsonic acid
  • p-Carbamidophenylarsonic acid
  • 4-Ureido-1-phenylarsonic acid
  • [4-[(Aminocarbonyl)amino]phenyl]arsonic acid
  • (4-((Aminocarbonyl)amino)phenyl)arsonic acid
  • Aminarsonum
  • Carbarsonum

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
173.9 °Cexp.
Solubility
1 to 10 mg/mL at 71.1 °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
260.08 g/molcalc.
Exact mass
259.9778 Dacalc.
LogP (octanol/water)
-1.26calc.
Topological polar surface area
112.7 Ųcalc.
Hydrogen bond donors
4calc.
Hydrogen bond acceptors
2calc.
Rotatable bonds
2calc.
Heavy atoms
14calc.
Rings
1calc.
Aromatic rings
1calc.
Fraction sp3 carbons
0calc.
Formal charge
0calc.
Stereocentres
0calc.
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)
GHS09: Hazardous to the environment
Hazardous to the environment

Hazard statements

  • H301Toxic if swallowed.
  • H331Toxic if inhaled.
  • H400Very toxic to aquatic life.
  • H410Very toxic to aquatic life with long lasting effects.
Precautionary statements (14)
  • P261Avoid breathing dust, fume, gas, mist, vapours or spray.
  • P264Wash skin thoroughly after handling.
  • P270Do not eat, drink or smoke when using this product.
  • P271Use only outdoors or in a well-ventilated area.
  • P273Avoid release to the environment.
  • P301 + P316If swallowed: Get emergency medical help immediately.
  • P304 + P340If inhaled: Remove person to fresh air and keep comfortable for breathing.
  • P316Get emergency medical help immediately.
  • P321Specific treatment (see supplemental first aid instructions on the label).
  • P330Rinse mouth.
  • P391Collect spillage.
  • P403 + P233Store in a well-ventilated place. Keep container tightly closed.
  • P405Store locked up.
  • P501Dispose of contents and container in accordance with local regulations.
UN number
UN 3280

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

Carbarsone suppliers

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Where suppliers are based

1 supplier in 1 country

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Carbarsone 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

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 Carbarsone is traded under.

HS 2931.90Indicative HS code

Organo-inorganic compounds, other than tetramethyl lead, tetraethyl lead, tributyltin compounds…

World exports in 2024
$3.97B
+5.3% vs 2023, imports $3.93B
2019 to 2024
Top exporters
  1. China28.3%
  2. United States15.6%
  3. Germany15.1%
Top importers
  1. United States14.6%
  2. China13.0%
  3. South Korea8.5%
Reported customs values in USD, not prices.Full trade data

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

Frequently asked questions

Quick answers about Carbarsone, based on the data on this page

What is Carbarsone?

[4-(carbamoylamino)phenyl]arsonic acid is a member of ureas.

What is the CAS number of Carbarsone?

The CAS registry number of Carbarsone is 121-59-5.

What is the molecular formula and weight of Carbarsone?

The molecular formula of Carbarsone is C7H9AsN2O4 and its molar mass is 260.08 g/mol.

What is Carbarsone used for?

Known uses and roles of Carbarsone include building blocks in research and laboratory and screening compounds in research and laboratory.

Is Carbarsone hazardous?

Carbarsone carries the GHS signal word "Danger". Main hazards: toxic if swallowed, toxic if inhaled, very toxic to aquatic life. This summary is not an SDS, always read the supplier safety data sheet.

What is the HS code of Carbarsone?

Carbarsone is usually classified under HS code 293190 (X. ORGANO-INORGANIC COMPOUNDS, HETEROCYCLIC COMPOUNDS, NUCLEIC ACIDS AND THEIR SALTS…). This is indicative, confirm it with your customs broker before shipping.

Where can I buy Carbarsone?

CompoundList lists 1 supplier of Carbarsone in United States. Send one free request to get and compare quotes. Your contact details stay private until you accept a quote.

What is the price of Carbarsone?

Suppliers quote Carbarsone 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 Carbarsone

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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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