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Nitriles, nitro and azo compounds

Neothorin

Also known as Arsenazo-I Trisodium Hydrate, Arsenazo I hydrate, disodium, 3-[(2-arsonophenyl)diazenyl]-4,5-dihydroxynaphthalene-2,7-disulfonate

CAS 3547-38-4Formula C16H11AsN2Na2O11S2Molar mass 592.30 g/molEC 222-600-3
GHS signal word: Danger. Pictograms: Acute toxicity (severe), Hazardous to the environment
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Neothorin chemical structure, C16H11AsN2Na2O11S2, CAS 3547-38-4
2D chemical structure

Key facts

What buyers check first

All properties
CAS number
3547-38-4
Formula
C16H11AsN2Na2O11S2
Molar mass
592.30 g/mol
EC number
222-600-3
HS code
293190
Category
Nitriles, nitro and azo compounds

What is Neothorin?

Plain description, key identifiers and synonyms

Neothorin is a chemical substance with the molecular formula C16H11AsN2Na2O11S2 and a molar mass of 592.30 g/mol. Its CAS registry number is 3547-38-4. The IUPAC name is disodium, 3-[(2-arsonophenyl)diazenyl]-4,5-dihydroxynaphthalene-2,7-disulfonate.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
disodium, 3-[(2-arsonophenyl)diazenyl]-4,5-dihydroxynaphthalene-2,7-disulfonate
CAS number
3547-38-4
EC number
222-600-3
Molecular formula
C16H11AsN2Na2O11S2
InChIKey
XRURKGOGGBIGRV-UHFFFAOYSA-L
InChI
InChI=1S/C16H13AsN2O11S2.2Na/c20-12-7-9(31(25,26)27)5-8-6-13(32(28,29)30)15(16(21)14(8)12)19-18-11-4-2-1-3-10(11)17(22,23)24;;/h1-7,20-21H,(H2,22,23,24)(H,25,26,27)(H,28,29,30);;/q;2*+1/p-2
SMILES (canonical and isomeric)
C1=CC=C(C(=C1)N=NC2=C(C3=C(C=C(C=C3C=C2S(=O)(=O)[O-])S(=O)(=O)[O-])O)O)[As](=O)(O)O.[Na+].[Na+]

Synonyms

  • Arsenazo-I Trisodium Hydrate
  • Arsenazo I hydrate
  • disodium, 3-[(2-arsonophenyl)diazenyl]-4,5-dihydroxynaphthalene-2,7-disulfonate
  • 2,7-Naphthalenedisulfonic acid, 3-[(2-arsonophenyl)azo]-4,5-dihydroxy-, disodium salt
  • 3-[2-(2-Arsonophenyl)diazenyl]-4,5-dihydroxy-2,7-naphthalenedisulfonic acid sodium salt (1:2)

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
592.30 g/molcalc.
Exact mass
591.8816 Dacalc.
LogP (octanol/water)
-5.96calc.
Topological polar surface area
237.1 Ųcalc.
Hydrogen bond donors
4calc.
Hydrogen bond acceptors
11calc.
Rotatable bonds
5calc.
Heavy atoms
34calc.
Rings
3calc.
Aromatic rings
3calc.
Fraction sp3 carbons
0calc.
Formal charge
0calc.
Stereocentres
0calc.
Components
3calc.
Lipinski rule of five
Fails (2 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, c1ccc(N=Nc2ccc3ccccc3c2)cc1

c1ccc(N=Nc2ccc3ccccc3c2)cc1

3 rings, 18 atoms, the Diazene, 2-naphthalenylphenyl- ring system.

600 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.

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

Neothorin suppliers

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Neothorin price

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Uses and applications

What the substance is used for, by industry and function

Applications are not documented for this substance yet. Suppliers often describe uses on their product pages, linked in the suppliers list above.

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

Frequently asked questions

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

What is Neothorin?

Neothorin is a chemical substance with the molecular formula C16H11AsN2Na2O11S2 and a molar mass of 592.30 g/mol. Its CAS registry number is 3547-38-4. The IUPAC name is disodium, 3-[(2-arsonophenyl)diazenyl]-4,5-dihydroxynaphthalene-2,7-disulfonate.

What is the CAS number of Neothorin?

The CAS registry number of Neothorin is 3547-38-4.

What is the molecular formula and weight of Neothorin?

The molecular formula of Neothorin is C16H11AsN2Na2O11S2 and its molar mass is 592.30 g/mol.

Is Neothorin hazardous?

Neothorin 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 Neothorin?

Neothorin 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 Neothorin?

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What is the price of Neothorin?

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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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