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Silicates, borates and other salts

Silver arsenite

Also known as Trisilver arsenite, Silver orthoarsenite, Arsenous acid, trisilver(1+) salt

CAS 7784-08-9Formula H3Ag3AsO3Molar mass 449.55 g/molEC 232-048-5
GHS signal word: Danger. Pictograms: Acute toxicity (severe), Hazardous to the environment
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Silver arsenite chemical structure, H3Ag3AsO3, CAS 7784-08-9
2D chemical structure

Key facts

What buyers check first

All properties
CAS number
7784-08-9
Formula
H3Ag3AsO3
Physical form
Powder
HS code
284329
Category
Silicates, borates and other salts
UN number
UN 1683
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 Silver arsenite?

Plain description, key identifiers and synonyms

Silver arsenite appears as a fine yellow powder. Sensitive to light. Irritating to skin, eyes, and mucous membranes. Highly toxic by ingestion and inhalation. Used to make dyes and insecticides.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
arsorous acid, silver
CAS number
7784-08-9 CAS number cross-checked
EC number
232-048-5
Molecular formula
H3Ag3AsO3
InChIKey
FQUOIMHWJGIXSS-UHFFFAOYSA-N
InChI
InChI=1S/3Ag.AsH3O3/c;;;2-1(3)4/h;;;2-4H
SMILES (canonical and isomeric)
O[As](O)O.[Ag].[Ag].[Ag]

Synonyms

  • Trisilver arsenite
  • Silver orthoarsenite
  • Arsenous acid, trisilver(1+) salt
  • Arsenious acid, trisilver(1+) salt
  • Arsenious acid (h3aso3), trisilver(1+) salt
  • Arsorous acid--silver (1/3)

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.

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
449.55 g/molcalc.
Exact mass
446.6451 Dacalc.
LogP (octanol/water)
-2.06calc.
Topological polar surface area
60.69 Ųcalc.
Hydrogen bond donors
3calc.
Hydrogen bond acceptors
3calc.
Rotatable bonds
0calc.
Heavy atoms
7calc.
Rings
0calc.
Aromatic rings
0calc.
Fraction sp3 carbons
0calc.
Formal charge
0calc.
Stereocentres
0calc.
Components
4calc.

Calculated for screening. Confirm critical figures with the supplier.

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.
  • 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 1683
Transport hazard class
6.1
Packing group
II

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

Silver arsenite suppliers

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Silver arsenite 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

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 Silver arsenite is traded under.

HS 2843.29Indicative HS code

Silver compounds, other

World exports in 2024
$631M
+295% vs 2023, imports $228M
2019 to 2024
Top exporters
  1. United Kingdom80.3%
  2. Germany5.0%
  3. Japan3.8%
Top importers
  1. Germany23.3%
  2. Switzerland * partner reported12.4%
  3. Malaysia11.0%

* Partner reported figures, a lower bound.

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

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

Frequently asked questions

Quick answers about Silver arsenite, based on the data on this page

What is Silver arsenite?

Silver arsenite appears as a fine yellow powder. Sensitive to light. Irritating to skin, eyes, and mucous membranes. Highly toxic by ingestion and inhalation. Used to make dyes and insecticides.

What is the CAS number of Silver arsenite?

The CAS registry number of Silver arsenite is 7784-08-9.

What is the molecular formula and weight of Silver arsenite?

The molecular formula of Silver arsenite is H3Ag3AsO3 and its molar mass is 449.55 g/mol.

Is Silver arsenite hazardous?

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

What is the HS code of Silver arsenite?

Silver arsenite is usually classified under HS code 284329 (Silver compounds, other). This is indicative, confirm it with your customs broker before shipping.

Where can I buy Silver arsenite?

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What is the price of Silver arsenite?

Suppliers quote Silver arsenite 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 Silver arsenite

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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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