Chemical Safety Data Sheet MSDS / SDS
ARSENIC(V) OXIDE HYDRATE
Revision Date:2026-03-21Revision Number:1
Product identifier
- Product name: ARSENIC(V) OXIDE HYDRATE
- CBnumber: CB1426829
- CAS: 12044-50-7
- EINECS Number: 629-626-8
- Synonyms: ARSENIC PENTOXIDE;ARSENIC PENTOXIDE HYDRATE
Relevant identified uses of the substance or mixture and uses advised against
- Relevant identified uses: For R&D use only. Not for medicinal, household or other use.
- Uses advised against: none
Company Identification
- Company: Chemicalbook
- Address: Building 1, Huihuang International, Shangdi 10th Street, Haidian District, Beijing
- Telephone: 010-86108875
GHS Label elements, including precautionary statements
-
Symbol(GHS)
- Signal wordDanger
P301+P310 IF SWALLOWED: Immediately call a POISON CENTER or doctor/physician.
P273 Avoid release to the environment.
P264 Wash skin thouroughly after handling.
P261 Avoid breathing dust/fume/gas/mist/vapours/spray.
P202 Do not handle until all safety precautions have been read and understood.
Hazard statements
H410 Very toxic to aquatic life with long lasting effects
H350 May cause cancer
H331 Toxic if inhaled
H300 Fatal if swallowed
Substance
- Product name: ARSENIC(V) OXIDE HYDRATE
- Synonyms: ARSENIC PENTOXIDE;ARSENIC PENTOXIDE HYDRATE
- CAS: 12044-50-7
- EC number: 629-626-8
- MF: As2H2O6
- MW: 247.86
General advice
First aiders need to protect themselves. Show this safety data sheet to the doctor in attendance.
If inhaled
After inhalation: fresh air. Immediately call in physician. If breathing stops: immediately apply artificial respiration, if necessary also oxygen.
In case of skin contact
In case of skin contact: Take off immediately all contaminated clothing. Rinse skin with water/ shower. Consult a physician.
In case of eye contact
After eye contact: rinse out with plenty of water. Call in ophthalmologist. Remove contact lenses.
If swallowed
If swallowed: give water to drink (two glasses at most). Seek medical advice immediately. In exceptional cases only, if medical care is not available within one hour, induce vomiting (only in persons who are wide awake and fully conscious), administer activated charcoal (20 - 40 g in a 10% slurry) and consult a doctor as quickly as possible.
Most important symptoms and effects, both acute and delayed
The most important known symptoms and effects are described in the labelling (see section 2) and/or in section 11
Protection of first-aiders
For personal protection see section 8.
Notes to physician
No data available
Suitable extinguishing media
Use extinguishing measures that are appropriate to local circumstances and the surrounding environment.
Unsuitable extinguishing media
For this substance/mixture no limitations of extinguishing agents are given.
Specific hazards during fire fighting
Not combustible. Ambient fire may liberate hazardous vapours.
Hazardous combustion products
Arsenic oxides
Specific extinguishing methods
Prevent fire extinguishing water from contaminating surface water or the ground water system.
Special protective equipment for fire-fighters
Stay in danger area only with self-contained breathing apparatus. Prevent skin contact by keeping a safe distance or by wearing suitable protective clothing.
Personal precautions, protective equipment and emergency procedures
Advice for non-emergency personnel: Avoid generation and inhalation of dusts in all circumstances. Avoid substance contact. Ensure adequate ventilation. Evacuate the danger area, observe emergency procedures, consult an expert. Advice for emergency responders: For personal protection see section 8.
Environmental precautions
Do not let product enter drains.
Methods and materials for containment and cleaning up
Cover drains. Collect, bind, and pump off spills. Observe possible material restrictions (see sections 7 and 10). Take up carefully. Dispose of properly. Clean up affected area. Avoid generation of dusts.
Handling
Advice on safe handlingWork under hood. Do not inhale substance/mixture.
Avoidance of contact
Strong oxidizing agents Strong acids
Storage
Further information on storage conditionsTightly closed. Dry. Keep in a well-ventilated place. Keep locked up or in an area accessible only to qualified or authorised persons.
Storage class
6.1B, Non-combustible, acute toxic Cat. 1 and 2 / very toxic hazardous materials
Recommended storage temperature
Recommended storage temperature see product label.
Further information on storage stability
Hygroscopic.
control parameter
Hazard composition and occupational exposure limitsDoes not contain substances with occupational exposure limits.
Engineering measures
No data available
Personal protective equipment
Respiratory protectionrequired when dusts are generated.
Our recommendations on filtering respiratory protection are based on the following standards: DIN EN 143, DIN 14387 and other accompanying standards relating to the used respiratory protection system.
Recommended Filter type
Our recommendations on filtering respiratory protection are based on the following standards: DIN EN 143, DIN 14387 and other accompanying standards relating to the used respiratory protection system.
Filter type P3
The entrepeneur has to ensure that maintenance, cleaning and testing of respiratory protective devices are carried out according to the instructions of the producer. These measures have to be properly documented.
Eye/face protection
The entrepeneur has to ensure that maintenance, cleaning and testing of respiratory protective devices are carried out according to the instructions of the producer. These measures have to be properly documented.
Use equipment for eye protection tested and approved under appropriate government standards such as NIOSH (US) or EN 166(EU).
Safety glasses
Skin and body protection
Safety glasses
protective clothing
Hygiene measures
Immediately change contaminated clothing. Apply preventive skin protection. Wash hands and face after working with substance.
Information on basic physicochemical properties
- Physical statepowder
- Autoignition temperatureNo data available
- Partition coefficient: n-octanol/waterNo data available
- Water solubilityNo data available
- Density4.32 g/cm3 (25 °C)
Method: lit. - Relative density4.32 g/mL at 25 °C(lit.)
- Relative vapor densityNo data available
- Vapor pressureNo data available
- Lower explosion limit / Lower flammability limitNo data available
- Upper explosion limit / Upper flammability limitNo data available
- Burning rateNo data available
- Flammability (liquids)No data available
- Flammability (solid, gas)The product is not flammable.
- Evaporation rateNo data available
- Flash pointNot applicable
- Boiling point/boiling rangeNo data available
- Melting point/ range315 °C
- pHNo data available
- Odor ThresholdNo data available
- OdorNo data available
- Colorwhite
- Appearancepowder
- Particle characteristics Particle sizeNo data available
- Molecular weight229.84 g/mol
- Oxidizing propertiesnone
- Explosive propertiesNo data available
- Flow timeNo data available
- Viscosity, kinematicNo data available
- Viscosity, dynamicNo data available
- Decomposition temperatureNo data available
Reactivity
No data available
Chemical stability
The product is chemically stable under standard ambient conditions (room temperature) .
Possibility of hazardous reactions
No data available
Conditions to avoid
Avoid moisture. no information available
Incompatible materials
Strong oxidizing agents Strong acids
Hazardous decomposition products
In the event of fire: see section 5
11.1 Information on toxicological effects
Acute toxicityLD50 Oral - Rat - 8 mg/kg
Remarks: (anhydrous substance) (RTECS)
Acute toxicity estimate Inhalation - 4 h - 0.51 mg/l - dust/mist (Expert judgement)
Dermal: No data available
Skin corrosion/irritation
Remarks: (anhydrous substance) (RTECS)
Acute toxicity estimate Inhalation - 4 h - 0.51 mg/l - dust/mist (Expert judgement)
Dermal: No data available
Classified based on available data. For more details, see section 2
Serious eye damage/eye irritation
Classified based on available data. For more details, see section 2
Respiratory or skin sensitization
Classified based on available data. For more details, see section 2
Germ cell mutagenicity
Classified based on available data. For more details, see section 2
Carcinogenicity
May cause cancer. Positive evidence from human epidemiological studies.
Reproductive toxicity
Classified based on available data. For more details, see section 2
Specific target organ toxicity - single exposure
Classified based on available data. For more details, see section 2
Specific target organ toxicity - repeated exposure
Classified based on available data. For more details, see section 2
Aspiration hazard
Classified based on available data. For more details, see section 2
11.2 Additional Information
To the best of our knowledge, the chemical, physical, and toxicological properties have not been thoroughly investigated.
Ecotoxicity
Components:
arsenic pentoxide hydrate (x):
Toxicity to fish(Oncorhynchus mykiss (rainbow trout)): 28 mg/l Exposure time: 96 h Test Type: static test Remarks: (anhydrous substance) (HSDB)
M-Factor (Acute aquatic toxicity)
10
Toxicity to fish (Chronic toxicity)
NOEC (Pimephales promelas (fathead minnow)): 0.53 mg/l Exposure time: 30 d Remarks: (anhydrous substance) (ECOTOX Database)
Ecotoxicology Assessment
Acute aquatic toxicityVery toxic to aquatic life.
Chronic aquatic toxicity
Very toxic to aquatic life with long lasting effects.
Persistence and degradability
Components:
arsenic pentoxide hydrate (x):
BiodegradabilityRemarks: The methods for determining biodegradability are not applicable to inorganic substances.
Bioaccumulative potential
No data available
Mobility in soil
No data available
Other adverse effects
No data available
Disposal methods
Waste from residuesOffer surplus and non-recyclable solutions to a licensed disposal company.
International Regulations
IATA-DGR
UN/ID No. : UN 1559
Proper shipping name : Arsenic pentoxide
Class : 6.1
Packing group : II
Labels : Division 6.1 - Toxic substances
Packing instruction (cargo aircraft) : 676
Packing instruction (passenger aircraft) : 669
Proper shipping name : Arsenic pentoxide
Class : 6.1
Packing group : II
Labels : Division 6.1 - Toxic substances
Packing instruction (cargo aircraft) : 676
Packing instruction (passenger aircraft) : 669
IMDG-Code
UN number : UN 1559
Proper shipping name : ARSENIC PENTOXIDE
Class : 6.1
Packing group : II
Labels : 6.1
EmS Code : F-A, S-A
Marine pollutant : yes
Proper shipping name : ARSENIC PENTOXIDE
Class : 6.1
Packing group : II
Labels : 6.1
EmS Code : F-A, S-A
Marine pollutant : yes
Transport in bulk according to Annex II of MARPOL 73/78 and the IBC Code
Not applicable for product as supplied.
National Regulations
JT/T 617
UN number : UN 1559
Proper shipping name : ARSENIC PENTOXIDE
Class : 6.1
Packing group : II
Labels : 6.1
Environmentally hazardous : no
Proper shipping name : ARSENIC PENTOXIDE
Class : 6.1
Packing group : II
Labels : 6.1
Environmentally hazardous : no
Special precautions for user
The transport classification(s) provided herein are for informational purposes only, and solely based upon the properties of the unpackaged material as it is described within this Safety Data Sheet. Transportation classifications may vary by mode of transportation, package sizes, and variations in regional or country regulations.
Downstream users need to comply with the conditions of safe use of the chemical, understand the environmental and health hazard and risk management measures identified on the SDS as well as the local/national regulations concerning the chemical.
National regulatory information
Law on the Prevention and Control of Occupational Diseases
Regulations on Safety Management of Hazardous Chemicals
Catalogue of Hazardous Chemicals
Listed
Identification of Major Hazard Installations for Hazardous Chemicals (GB 18218)
No. / Code Chemical name / Category Threshold quantity
J5 Acute toxic 500 t
Hazardous Chemicals for Priority Management
Not listed under SAWS
Catalogue of Specially Controlled Hazardous
Not listed Chemicals
List of Explosive Precursors
Not listed
List of Toxic and Hazardous Air Pollutants
Listed
List of Toxic and Hazardous Soil Pollutants
Listed
Regulations on Labour Protection in Workplaces where Toxic Substances are Used
Catalogue of Highly Toxic Chemicals
Listed
Regulation of Environmental Management on the First Import of Chemicals and the Import and Export of Toxic Chemicals
China Severely Restricted Toxic Chemicals for Import and Export
Not listed
Measures on the Environmental Administration of New Chemical Substances Registration
Registration/Notification number
B1A222224956
Regulation on the Administration of Precursor Chemicals
Catalogue and Classification of Precursor Chemicals
Not listed
Regulations on the Administration of Controlled Chemicals
List of Controlled Chemicals
Not listed
Regulations of Ozone Depleting Substances Management
List of Controlled Ozone Depleting Substances
Not listed
List of Controlled Ozone Depleting Substances Import and Export
Not listed
Environmental Protection Law
List of Priority Controlled Chemicals
Listed
List of Key Controlled New Pollutants
Not listed
Full text of other abbreviations
ACGIHUSA. ACGIH Threshold Limit Values (TLV)
GBZ 2.1-2007
Occupational exposure limits for hazardous agents in the workplace - Chemical hazardous agents.
ACGIH / TWA
8-hour, time-weighted average
GBZ 2.1-2007 / PC-TWA
Permissible concentration - time weighted average
GBZ 2.1-2007 / PC-STEL AIIC - Australian Invent Transport by Land of Bra bw - Body weight; CMR Standard of the German List (Canada); ECx - Conc associated with x% respo Chemical Substances (Jap response; ERG - Emerge GLP - Good Laboratory P cer; IATA - International Construction and Equipm Half maximal inhibitory c tion; IECSC - Inventory o tional Maritime Dangerou Industrial Safety and H Standardisation; KECI - K tration to 50 % of a test (Median Lethal Dose); MA lution from Ships; MERC of Dangerous Goods; n.o. - No Observed (Adverse) fect Level; NOELR - No Norm; NTP - National Toxi icals; OECD - Organisatio fice of Chemical Safety a and Toxic substance; PIC stances; (Q)SAR - (Quant (EC) No 1907/2006 of th Registration, Evaluation, Accelerating Decompositi Chemical Substance Inve Thailand Existing Chemica States); UN - United Nat Transport of Dangerous WHMIS - Workplace Hazar
Permissible concentration - short term exposure limit ry of Industrial Chemicals
ANTT - National Agency for il
ASTM - American Society for the Testing of Materials
- Carcinogen, Mutagen or Reproductive Toxicant
DIN nstitute for Standardisation
DSL - Domestic Substances ntration associated with x% response
ELx - Loading rate se
EmS - Emergency Schedule
ENCS - Existing and New n)
ErCx - Concentration associated with x% growth rate cy Response Guide
GHS - Globally Harmonised System
actice
IARC - International Agency for Research on Canir Transport Association
IBC - International Code for the nt of Ships carrying Dangerous Chemicals in Bulk
IC50 ncentration
ICAO - International Civil Aviation Organiza- Existing Chemical Substances in China
IMDG - Interna- Goods
IMO - International Maritime Organisation
ISHL alth Law (Japan)
ISO - International Organisation for rea Existing Chemicals Inventory
LC50 - Lethal Concenopulation
LD50 - Lethal Dose to 50% of a test population POL - International Convention for the Prevention of Pol- SUR - The Agreement for the Facilitation of the Transport . - Not Otherwise Specified
Nch - Chilean Norm
NO(A)EC ffect Concentration
NO(A)EL - No Observed (Adverse) Efbservable Effect Loading Rate
NOM - Official Mexican ology Program
NZIoC - New Zealand Inventory of Chemfor Economic Co-operation and Development
OPPTS - Ofd Pollution Prevention
PBT - Persistent, Bioaccumulative S - Philippines Inventory of Chemicals and Chemical Subtative) Structure Activity Relationship
REACH - Regulation European Parliament and of the Council concerning the uthorisation and Restriction of Chemicals
SADT - Selfn Temperature
SDS - Safety Data Sheet
TCSI - Taiwan tory
TDG - Transportation of Dangerous Goods
TECI s Inventory
TSCA - Toxic Substances Control Act (United ons
UNRTDG - United Nations Recommendations on the oods
vPvB - Very Persistent and Very Bioaccumulative
ous Materials Information System
ANTT - National Agency for il
ASTM - American Society for the Testing of Materials
- Carcinogen, Mutagen or Reproductive Toxicant
DIN nstitute for Standardisation
DSL - Domestic Substances ntration associated with x% response
ELx - Loading rate se
EmS - Emergency Schedule
ENCS - Existing and New n)
ErCx - Concentration associated with x% growth rate cy Response Guide
GHS - Globally Harmonised System
actice
IARC - International Agency for Research on Canir Transport Association
IBC - International Code for the nt of Ships carrying Dangerous Chemicals in Bulk
IC50 ncentration
ICAO - International Civil Aviation Organiza- Existing Chemical Substances in China
IMDG - Interna- Goods
IMO - International Maritime Organisation
ISHL alth Law (Japan)
ISO - International Organisation for rea Existing Chemicals Inventory
LC50 - Lethal Concenopulation
LD50 - Lethal Dose to 50% of a test population POL - International Convention for the Prevention of Pol- SUR - The Agreement for the Facilitation of the Transport . - Not Otherwise Specified
Nch - Chilean Norm
NO(A)EC ffect Concentration
NO(A)EL - No Observed (Adverse) Efbservable Effect Loading Rate
NOM - Official Mexican ology Program
NZIoC - New Zealand Inventory of Chemfor Economic Co-operation and Development
OPPTS - Ofd Pollution Prevention
PBT - Persistent, Bioaccumulative S - Philippines Inventory of Chemicals and Chemical Subtative) Structure Activity Relationship
REACH - Regulation European Parliament and of the Council concerning the uthorisation and Restriction of Chemicals
SADT - Selfn Temperature
SDS - Safety Data Sheet
TCSI - Taiwan tory
TDG - Transportation of Dangerous Goods
TECI s Inventory
TSCA - Toxic Substances Control Act (United ons
UNRTDG - United Nations Recommendations on the oods
vPvB - Very Persistent and Very Bioaccumulative
ous Materials Information System
Disclaimer:
The information in this MSDS is only applicable to the specified product, unless otherwise specified, it is not applicable to the mixture of this product and other substances. This MSDS only provides information on the safety of the product for those who have received the appropriate professional training for the user of the product. Users of this MSDS must make independent judgments on the applicability of this SDS. The authors of this MSDS will not be held responsible for any harm caused by the use of this MSDS.