CAS #:

Linear Formula:


MDL Number:


EC No.:



(2N) 99% Arsenic(V) Sulfide
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(3N) 99.9% Arsenic(V) Sulfide
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(4N) 99.99% Arsenic(V) Sulfide
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(5N) 99.999% Arsenic(V) Sulfide
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Arsenic(V) Sulfide Properties (Theoretical)

Compound Formula As2S5
Molecular Weight 310.17
Appearance Powder or crystals
Melting Point >300 °C
Boiling Point N/A
Density N/A
Solubility in H2O N/A
Exact Mass 309.703548 g/mol
Monoisotopic Mass 309.703548 g/mol

Arsenic(V) Sulfide Health & Safety Information

Signal Word Danger
Hazard Statements H301 + H331-H410
Hazard Codes T,N
Risk Codes 23/25-50/53
Safety Statements 20/21-28-45-60-61
RTECS Number N/A
Transport Information UN 1557 6.1 / PGII
WGK Germany 3
GHS Pictograms

View and Print SDS


Date Accessed: 10/27/2021
Date Revised: 05/15/2015


Product Name: Arsenic(V) Sulfide

Product Number: All applicable American Elements product codes, e.g. AS5-S-02-C , AS5-S-03-C , AS5-S-04-C , AS5-S-05-C

CAS #: 1303-34-0

Relevant identified uses of the substance: Scientific research and development

Supplier details:
American Elements
10884 Weyburn Ave.
Los Angeles, CA 90024
Tel: +1 310-208-0551
Fax: +1 310-208-0351

Emergency telephone number:
Domestic, North America: +1 800-424-9300
International: +1 703-527-3887


Classification of the substance or mixture
H301 Toxic if swallowed.
H331 Toxic if inhaled.
H400 Very toxic to aquatic life.
H410 Very toxic to aquatic life with long lasting effects.
Classification according to Directive 67/548/EEC or Directive 1999/45/EC
T; Toxic
R23/25: Toxic by inhalation and if swallowed.
N; Dangerous for the environment
R50/53: Very toxic to aquatic organisms, may cause long-term adverse effects in the
aquatic environment.
Hazard pictograms

Skull and Crossbones - GHS06 Environment - GHS09

Signal word: Danger
Hazard statements
H301+H311+H331 Toxic if swallowed, in contact with skin or if inhaled.
Precautionary statements
P261 Avoid breathing dust/fume/gas/mist/vapors/spray.
P280 Wear protective gloves/protective
clothing/eye protection/face protection.
P301+P310 IF SWALLOWED: Immediately call a POISON CENTER/ doctor/...
P361 Take off immediately all contaminated clothing.
H400 Very toxic to aquatic life.
H410 Very toxic to aquatic life with long lasting effects.
Classification system
HMIS ratings (scale 0-4)
(Hazardous Materials Identification System)

Health (acute effects) = 2
Flammability = 0
Physical Hazard = 1
Other hazards
Results of PBT and vPvB assessment


(CAS#) Description:
Arsenic(V) sulfide (CAS# 1303-34-0)


Description of first aid measures
General information
Immediately remove any clothing soiled by the product.
Remove breathing apparatus only after contaminated clothing has been completely removed.
In case of irregular breathing or respiratory arrest provide artificial respiration.
If inhaled:
Supply patient with fresh air. If not breathing, provide artificial respiration. Keep patient warm.
Seek immediate medical advice.
In case of skin contact:
Immediately wash with soap and water; rinse thoroughly.
Seek immediate medical advice.
In case of eye contact:
Rinse opened eye for several minutes under running water. Consult a physician.
If swallowed:
Do not induce vomiting; immediately call for medical help.
Seek immediate medical advice.


Extinguishing media
Suitable extinguishing agents
Product is not flammable. Use fire fighting measures that suit the surrounding fire.
Special hazards arising from the substance or mixture
In case of fire, the following can be released:
Toxic metal oxide fume
Sulfur oxides (SOx)
Advice for firefighters
Protective equipment:
Wear self-contained respirator.
Wear fully protective impervious suit.


Personal precautions, protective equipment and emergency procedures
Use personal protective equipment. Keep unprotected persons away.
Ensure adequate ventilation
Environmental precautions:
Do not allow material to be released to the environment without official permits.
Methods and materials for containment and cleanup:
Dispose contaminated material as waste according to item 13.
Ensure adequate ventilation.
Reference to other sections
See Section 7 for information on safe handling
See Section 8 for information on personal protection equipment.
See Section 13 for disposal information.


Precautions for safe handling
Keep container tightly sealed.
Store in cool, dry place in tightly closed containers.
Ensure good ventilation at the workplace.
Open and handle container with care.
Information about protection against explosions and fires: The product is not flammable
Conditions for safe storage, including any incompatibilities
Requirements to be met by storerooms and receptacles: No special requirements.
Information about storage in one common storage facility: Store away from oxidizing agents.
Further information about storage conditions:
Keep container tightly sealed.
Store in cool, dry conditions in well-sealed containers.


Additional information about design of technical systems:
Properly operating chemical fume hood designed for hazardous chemicals and having an average face velocity of at least 100 feet per minute.
Control parameters
Components with limit values that require monitoring at the workplace:
Arsenic, elemental, and inorganic compounds (except arsine), as As
ACGIH TLV 0.01; Carcinogen
Belgium TWA 0.2
Denmark TWA 0.05
Finland Carcinogen
France VME 0.2
Hungary TWA 0.5; Carcinogen
Ireland TWA 0.1; Carcinogen
Korea TLV 0.01; Carcinogen
Netherlands TWA 0.05; 0.1-STEL
Norway TWA 0.02
Poland TWA 0.1
Sweden NGV 0.03; Carcinogen
Switzerland TWA 0.1; Carcinogen
United Kingdom TWA 0.1; Carcinogen
Additional information: No data
Exposure controls
Personal protective equipment
Follow typical protective and hygienic practices for handling chemicals.
Keep away from foodstuffs, beverages and feed.
Remove all soiled and contaminated clothing immediately.
Wash hands before breaks and at the end of work.
Store protective clothing separately.
Breathing equipment:
Use suitable respirator when high concentrations are present.
Refer to 29CFR1910.1018 for regulations on respiratory protection required during exposure to inorganic arsenic.
Protection of hands:
Impervious gloves
Inspect gloves prior to use.
Material of gloves
The selection of suitable gloves not only depends on the material, but also on quality.
Quality will vary from manufacturer to manufacturer.
Eye protection: Safety glasses
Body protection: Protective work clothing.


Information on basic physical and chemical properties
Form: Powder
Odor: No data available
Odor threshold: No data available.
pH: N/A
Melting point/Melting range: 300°C (572 °F)
Boiling point/Boiling range: 707°C (1305 °F)
Sublimation temperature / start: No data available
Flash point: N/A
Flammability (solid, gas) No data available.
Ignition temperature: No data available
Decomposition temperature: No data available
Autoignition: No data available.
Danger of explosion: Product does not present an explosion hazard.
Explosion limits:
Lower: No data available
Upper: No data available
Vapor pressure: N/A
Density at 20°C (68 °F): 3.43 g/cm3 (28.623 lbs/gal)
Relative density No data available.
Vapor density N/A
Evaporation rate N/A
Segregation coefficient (n-octonol/water): No data available.
Dynamic: N/A
Kinematic: N/A
Other information No data available


Chemical stability
Thermal decomposition / conditions to be avoided:
Decomposition will not occur if used and stored according to specifications.
Possibility of hazardous reactions No dangerous reactions known
Incompatible materials: Oxidizing agents
Hazardous decomposition products:
Toxic metal oxide fume
Sulfur oxides (SOx)


Information on toxicological effects
Acute toxicity:
LD/LC50 values that are relevant for classification:
Oral LD50 185 mg/kg (rat)
Primary irritant effect:
on the skin: May cause irritation
on the eye: May cause irritation
Sensitization: No sensitizing effects known.
Subacute to chronic toxicity:
Acute arsenic poisoning from ingestion results in marked irritation of the stomach and intestines with nausea, vomiting and diarrhea. In severe cases, the vomitus and stools are bloody and the patient goes into collapse and shock with weak, rapid pulse, cold sweats, coma and death.
Chronic arsenic poisoning may cause disturbances of the digestive system such as loss of appetite, cramps, nausea, constipation or diarrhea.
Subacute to chronic toxicity:
Sulfides show variable toxicity. The alkaline sulfides are similar in action to alkalies.
They cause irritation of the skin and are corrosive by ingestion. The heavy metal sulfides are generally insoluble and show little toxic action except through the liberation of hydrogen sulfide. Hydrogen sulfide, if generated, is toxic, a severe irritant and flammable.
Effects include conjunctivitis, headache, nausea, dizziness, coughing, pulmonary edema and possibly death.
Additional toxicological information:
To the best of our knowledge the acute and chronic toxicity of this substance is not fully known.
EPA-A: human carcinogen: sufficient evidence from epidemiologic studies to support a causal association between exposure and cancer.
IARC-1: Carcinogenic to humans: sufficient evidence of carcinogenicity.
NTP-1: Known to be carcinogenic: sufficient evidence from human studies.
Carcinogen as defined by OSHA.
ACGIH A1: Confirmed human carcinogen: Agent is carcinogenic to humans based on epidemiologic studies of, or convincing clinical evidence in, exposed humans.


Acquatic toxicity: No data available
Persistence and degradability No data available
Behavior in environmental systems:
Bioaccumulative potential No data available
Mobility in soil No data available
Ecotoxical effects:
Remark: Very toxic for aquatic organisms
Additional ecological information:
Do not allow product to reach groundwater, water courses, or sewage systems, even in small quantities.
Danger to drinking water if even extremely small quantities leak into the ground.
Also poisonous for fish and plankton in water bodies.
Do not allow material to be released to the environment without official permits.
Very toxic for aquatic organisms
Results of PBT and vPvB assessment
vPvB: N/A
Other adverse effects No data available


Waste treatment methods
Recommendation Consult official regulations to ensure proper disposal.
Uncleaned packagings:
Recommendation: Disposal must be made according to official regulations.


DOT regulations:
Hazard class: 6.1
Identification number: UN1557
Packing group: III
Proper shipping name (technical name): ARSENIC COMPOUND, SOLID, N.O.S. (Arsenic(V) sulfide)
Label 6.1
Land transport ADR/RID (cross-border)
ADR/RID class: 6.1 (T5) Toxic substances
Danger code (Kemler): 60
UN-Number: 1557
Packaging group: III
Special marking: Symbol (fish and tree)
UN proper shipping name: 1557 ARSENIC COMPOUND, SOLID, N.O.S. (Arsenic(V)
Maritime transport IMDG:
IMDG Class: 6.1
UN Number: 1557
Label 6.1
Packaging group: III
EMS Number: F-A,S-A
Marine pollutant: No
Proper shipping name: ARSENIC COMPOUND, SOLID, N.O.S. (Arsenic(V)
Air transport ICAO-TI and IATA-DGR:
ICAO/IATA Class: 6.1
UN/ID Number: 1557
Label 6.1
Packaging group: III
Proper shipping name: ARSENIC COMPOUND, SOLID, N.O.S. (Arsenic(V)
UN "Model Regulation": UN1557, ARSENIC COMPOUND, SOLID, N.O.S., 6.1, III
Environmental hazards: Environmentally hazardous substance, solid; Marine Pollutant
Special precautions for user Warning: Toxic substances
Transport in bulk according to Annex II of MARPOL73/78 and the IBC Code N/A


Safety, health and environmental regulations/legislation specific for the substance or mixture
Product related hazard informations:
Hazard symbols:
T Toxic
N Dangerous for the environment
Risk phrases:
23/25 Toxic by inhalation and if swallowed.
50/53 Very toxic to aquatic organisms, may cause long-term adverse effects in the aquatic environment.
Safety phrases:
20/21 When using do not eat, drink or smoke.
28 After contact with skin, wash immediately with plenty of soap and water
45 In case of accident or if you feel unwell, seek medical advice immediately.
60 This material and its container must be disposed of as hazardous waste.
61 Avoid release to the environment. Refer to special instructions/Safety data sheets
National regulations
All components of this product are listed in the U.S. Environmental Protection Agency Toxic
Substances Control Act Chemical substance Inventory.
This product contains a chemical known to the state of California to cause cancer or
reproductive toxicity.
All components of this product are listed on the Canadian Domestic Substances List (DSL).
Information about limitation of use:
For use only by technically qualified individuals.
This product contains arsenic and is subject to the reporting requirements of section 313 of the Emergency Planning and Community Right to Know Act of 1986 and 40CFR372.
Other regulations, limitations and prohibitive regulations
Refer to 29CFR1910.1018 for regulations concerning inorganic arsenic.
Chemical safety assessment: A Chemical Safety Assessment has not been carried out.


Safety Data Sheet according to Regulation (EC) No. 1907/2006 (REACH). The above information is believed to be correct but does not purport to be all inclusive and shall be used only as a guide. The information in this document is based on the present state of our knowledge and is applicable to the product with regard to appropriate safety precautions. It does not represent any guarantee of the properties of the product. American Elements shall not be held liable for any damage resulting from handling or from contact with the above product. See reverse side of invoice or packing slip for additional terms and conditions of sale. COPYRIGHT 1997-2021 AMERICAN ELEMENTS. LICENSED GRANTED TO MAKE UNLIMITED PAPER COPIES FOR INTERNAL USE ONLY.

About Arsenic(V) Sulfide

Arsenic(V) Sulfide is a crystalline solid used as a semiconductor and in photo optic applications. American Elements produces to many standard grades when applicable, including Mil Spec (military grade); ACS, Reagent and Technical Grade; Food, Agricultural and Pharmaceutical Grade; Optical Grade, USP and EP/BP (European Pharmacopoeia/British Pharmacopoeia) and follows applicable ASTM testing standards. Typical and custom packaging is available. Additional technical, research and safety (MSDS) information is available as is a Reference Calculator for converting relevant units of measurement.

Arsenic(V) Sulfide Synonyms

Arsenic pentasulfide, Diarsenic pentasulfide

Chemical Identifiers

Linear Formula As2S5
MDL Number MFCD00049840
EC No. N/A
Beilstein/Reaxys No. N/A
Pubchem CID 3371533
IUPAC Name [bis(sulfanylidene)-$l^{5}-arsanyl]sulfanyl-bis(sulfanylidene)-$l^{5}-arsane
SMILES S=[As](=S)S[As](=S)=S
InchI Identifier InChI=1S/As2S5/c3-1(4)7-2(5)6

Packaging Specifications

Typical bulk packaging includes palletized plastic 5 gallon/25 kg. pails, fiber and steel drums to 1 ton super sacks in full container (FCL) or truck load (T/L) quantities. Research and sample quantities and hygroscopic, oxidizing or other air sensitive materials may be packaged under argon or vacuum. Shipping documentation includes a Certificate of Analysis and Safety Data Sheet (SDS). Solutions are packaged in polypropylene, plastic or glass jars up to palletized 440 gallon liquid totes, and 36,000 lb. tanker trucks.

Related Elements


See more Arsenic products. Arsenic (atomic symbol: As, atomic number: 33) is a Block P, Group 15, Period 4 element with an atomic radius of 74.92160. Arsenic Bohr ModelThe number of electrons in each of arsenic's shells is 2, 8, 18, 5 and its electron configuration is [Ar] 3d10 4s2 4p3. The arsenic atom has a radius of 119 pm and a Van der Waals radius of 185 pm. Arsenic was discovered in the early Bronze Age, circa 2500 BC. It was first isolated by Albertus Magnus in 1250 AD. In its elemental form, arsenic is a metallic grey, brittle, crystalline, semimetallic solid. Elemental ArsenicArsenic is found in numerous minerals including arsenolite (As2O3), arsenopyrite (FeAsS), loellingite (FeAs2), orpiment (As2S3), and realgar (As4S4). Arsenic has numerous applications as a semiconductor and other electronic applications as indium arsenide, silicon arsenide and tin arsenide. Arsenic is finding increasing uses as a doping agent in solid-state devices such as transistors.


See more Sulfur products. Sulfur (or Sulphur) (atomic symbol: S, atomic number: 16) is a Block P, Group 16, Period 3 element with an atomic radius of 32.066. Sulfur Bohr ModelThe number of electrons in each of Sulfur's shells is 2, 8, 6 and its electron configuration is [Ne] 3s2 3p4. In its elemental form, sulfur has a light yellow appearance. The sulfur atom has a covalent radius of 105 pm and a Van der Waals radius of 180 pm. In nature, sulfur can be found in hot springs, meteorites, volcanoes, and as galena, gypsum, and epsom salts. Sulfur has been known since ancient times but was not accepted as an element until 1777, when Antoine Lavoisier helped to convince the scientific community that it was an element and not a compound.


October 27, 2021
Los Angeles, CA
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