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Arsenic(III) oxide
Arsenic(III) oxide
Arsenic(III) oxide
CAS Number
: 1327-53-3
Chemical properties
Chemical formula
O
3
As
2
Empirical formula
As
2
O
3
Molecular weight
197.84
Metal
As
Theoretical metal content
76
Physical state
powder
Color
white
Metal purity
99.95
Your contact person
Luis Villalba
T: +54 2304 529 455
Email
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Umicore PMC
Philosophy
Our Partners
Previous
Products
Buchwald Precatalysts
Grubbs Catalyst® Portfolio
MeNAP CX Catalysts
YPhos Ligands
TMCat Ni - base metal catalysts
HPA Hexahydroxyplatinic Acid
Fine Precious Metal Blacks
Tetraammine Pt & Pd
Product finder
Previous
Technologies
Alkene Metathesis
Amination
Asymmetric reactions
Carbonylation
Cross-Coupling reactions
Hydroformylation
Hydrogenation
Hydrosilylation
Water Electrolysis
Previous
Markets
Chemicals
Pharmaceuticals
Automotive
Previous
Competencies
Customer Service
Quality Analysis
Process Development Support
Catalysis Solutions for CMOs
Research & Development
Metal Pricing
Metal Processing
Metal Refining
Previous
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Umicore Catalysis Symposium
Previous
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Blog
Press Releases
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Previous
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Safety & Well-being
Climate Action
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Due Diligence Compliance Report Cobalt Procurement
Due Diligence Compliance Report Archive
Previous
Media
Newsroom
Video center
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Events
Past events
Contact
Umicore's management of its historical pollution
Storage of historical radioactive materials in Olen well under control
Hoboken - Living together sustainably
Overview of legacy mining sites
Responsible sourcing of cobalt
Previous
Investor relations
Share price
Consensus & analyst coverage
Dividend
Shareholder structure
Transparency declarations
Shareholder meetings
Net financial debt & funding
Umicore bond issues
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Previous
Umicore Catalysis Symposium
4th Umicore Catalysis Symposium
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2nd Umicore Catalysis Symposium
1st Umicore Catalysis Symposium
Previous
The Umicore Way
Our values
Business integrity
Environment & Society
People
Shareholders
Organization
Previous
Battery Materials Solutions
Battery Cathode Materials
Battery Recycling Solutions
Battery Anode Materials
Previous
Catalysis
Automotive Catalysts
Precious Metals Chemistry
Fuel Cell & Stationary Catalysts
Previous
Recycling
Precious Metals Refining
Precious Metals Management
Jewelry & Industrial Metals
Previous
Specialty Materials
Cobalt & Specialty Materials
Electro-Optic Materials
Metal Deposition Solutions
Previous
Agriculture
Animal feed
Fertilizers
Agrochemicals
Previous
Aerospace
Foundry and superalloys
Multi-junction solar cells for satellites
Previous
Automotive & Mobility
Battery materials
Automotive catalysts
Fuel cell catalysts
Tires
Marine propulsion catalysts
Fuel additives
Photonics for automotive
Previous
Electronics & Telecom
Electronic components
LED
Optical fiber
Semiconductors
Microelectronics
Other photonics
Previous
Energy & Batteries
Battery materials
Energy storage
Photovoltaics
Green hydrogen
Previous
Healthcare & Life Sciences
Pharmaceuticals
Diagnostics
Cosmetics
Water treatment
Previous
Industrial & Manufacturing
Industrial emission reduction and control
Industrial chemicals and catalysts
Oilfield chemicals
Tool materials
Protective coatings and plating
Lubricants, greases and fluids
Plastics and polymers
Rubber
Asphalt and bitumen
Glass industry
Paints and coatings
Oxo industry
Previous
Jewelry & Lifestyle
Jewelry
Fashion
Previous
Optics
Infrared optics
Infrared optical filters
Infrared coatings
Ophtalmics
Previous
Precious Metals Trading & Industry
Nexyclus
Investment bars
Industrial metals
Fine precious metals blacks
Coins and blanks
Previous
Recycling Solutions
Precious metals
Battery materials
Previous
Due Diligence Compliance Report Archive
2023 - Due Diligence Compliance Report Archive
2022 - Due Diligence Compliance Report Archive
2021 - Due Diligence Compliance Report Archive
2020 - Due Diligence Compliance Report Archive
2019 - Due Diligence Compliance Report Archive
2018 - Due Diligence Compliance Report Archive
2017 - Due Diligence Compliance Report Archive
2016 - Due Diligence Compliance Report Archive
Previous
Overview of legacy mining sites
Introduction
France
Belgium
Germany
The Netherlands
United States
Previous
Shareholder structure
Share buyback
Disposal of own shares
Old shares
Data per share
Previous
Financial calendar
Past events
Previous
Capital markets events
Capital Markets Day 2025
Registration
At the Core 2023
Capital Markets Day 2022
Capital Markets Day 2018
Capital Markets Day 2015
Previous
Publications & reports
Financial reports
Annual report
Presentations
Previous
Supervisory committees
Nomination & Remuneration
Sustainability
Investment
Audit
Previous
Documents and policies
Addressing and understanding forced labour
Anti-bribery & anti-corruption policy
Articles of association
Code of Conduct
Corporate governance charter
Environmental stewardship policy
Health & safety
Umicore Human Rights Policy
ISO 27001 certification
Modern slavery statement
Our values
Product safety testing & animal welfare policy
Product stewardship
Remuneration policy
Shareholder rights
Supervision and compliance
Tax strategy
Previous
Diversity & Inclusion
Gender equity
Previous
What you could do
Research & development
Engineering & technology
Production & maintenance
Supply chain & logistics
STEM
Safety, health & environment
Finance
Digitalization & IT
Sales, HR & support
General management
Early talent
Previous
Belgium
Start
Previous
About
Business Model
Megatrends
Strategy
The Umicore Way
Business groups
Battery Materials Solutions
Catalysis
Recycling
Specialty Materials
History
Previous
Markets & Products
Agriculture
Aerospace
Automotive & Mobility
Electronics & Telecom
Energy & Batteries
Healthcare & Life Sciences
Industrial & Manufacturing
Jewelry & Lifestyle
Optics
Precious Metals Trading & Industry
Recycling Solutions
Previous
Sustainability
Environmental Impact
Responsible Sourcing
Responsible Sourcing of Battery Materials
Safety & Well-being
Climate Action
Diversity and Inclusion
Sustainability Governance
Sustainable Development Goals
Download Center
Giving Back to People and the Planet
Due Diligence Compliance Report Cobalt Procurement
Due Diligence Compliance Report Archive
Previous
Media
Newsroom
Video center
Media gallery
Events
Past events
Contact
Umicore's management of its historical pollution
Storage of historical radioactive materials in Olen well under control
Hoboken - Living together sustainably
Overview of legacy mining sites
Responsible sourcing of cobalt
Previous
Investor relations
Share price
Consensus & analyst coverage
Dividend
Shareholder structure
Transparency declarations
Shareholder meetings
Net financial debt & funding
Umicore bond issues
Financial calendar
Capital markets events
Publications & reports
Supervisory board
Supervisory committees
Executive leadership team
Documents and policies
Glossary
Previous
Join us
Why Umicore
What we value
Diversity & Inclusion
Meet Our Colleagues
What you could do
Find your next role with us
Recruitment process
Frequently Asked Questions
Previous
Contact
Supplier
Candidate
Customers
Investor relations
Journalist
Subscribe for our press releases
Previous
Locations
Argentina
Australia
Belgium
Brazil
Canada
Denmark
Finland
France
Germany
Greater China
India
Japan
Korea
Liechtenstein
Luxembourg
Netherlands
Philippines
Poland
Portugal
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Sweden
Thailand
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United States
Local websites
All sites
Previous
Battery Cathode Materials
Start
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Pyro-hydro technology
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Battery Anode Materials
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Start
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Contact
Previous
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Start
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Contact
Previous
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Start
Locations
Contact
Previous
Cobalt & Specialty Materials
Start
Locations
Contact
Previous
Electro-Optic Materials
Infrared solutions
Germanium solutions
Previous
Metal Deposition Solutions
Start
Locations
Contact
Previous
Battery materials
Electric vehicles
Cobalt and nickel precursors
Previous
Automotive catalysts
Precursors for off-gas treatment catalysts
Light-duty gasoline, hybrid electric, and alternative fuels
Light-duty diesel vehicles
Heavy-duty vehicles
Motorcycles and small engines
Previous
Marine propulsion catalysts
DNX marine
DNA
DNZ
cDPF
Previous
Fuel additives
Fuel borne catalysts
Deposit control additives
Previous
Photonics for automotive
Autonomous driving
Night vision and pedestrian detection
Automotive LED lighting
Vehicle integrated photovoltaics
Previous
Electronic components
Electrical contacts
Connectors
Electrodes for electroplating
Ribbons and wires
Previous
LED
High brightness LEDs
Micro LEDs
Thin film for LED
Previous
Semiconductors
Additives
Previous
Microelectronics
Electrolytes for electroplating
Thin film
GeCL4 precursor for GeH4
Previous
Other photonics
VCSELs
SWIR sensors
3D sensing
LiDAR
AR / VR / MR
Gamma ray detectors
Previous
Battery materials
Portable tools and electronics
Previous
Photovoltaics
Terrestrial CPV
Previous
Pharmaceuticals
Active pharmaceutical ingredients
Pharmaceutical intermediates & fine chemicals
Raw materials
Previous
Industrial emission reduction and control
Power generation
Refining and petrochemical
Chemical and industrial
Previous
Industrial chemicals and catalysts
Water electrolysis
Cobalt salts and precursors
Petrochemical catalysts
Polyester resins
Previous
Tool materials
Diamond tools
Friction materials
Hard metals
High-density materials
Metal injection molding
Shielding materials
Previous
Protective coatings and plating
Wear protection for tool materials
Thermal spray and hardfacing
Corrosion
Sealings
Surface treatments
Wood preservative
Previous
Lubricants, greases and fluids
Detergents
Mineral oil replacements
Lubricant additives
Previous
Plastics and polymers
Plastics and polymers additives
Biopolymers
Packaging and film additives
Polyurethane
Functional materials and polymers
Previous
Rubber
Catalysts
Adhesion promoters
Previous
Glass industry
Special design solutions
Oxides and salts
Previous
Paints and coatings
Paint driers
Binders
Anti-skinning
Pigment dispersant
Bio-solvents
Marine coatings
Previous
Jewelry
Semi-finished and casting
Turned and milled parts
Decorative coatings
Previous
Infrared optics
GASIR®
Tessella™
Thermography
Automotive
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Security and surveillance
Marine
Medical imaging
Smart sensing and IoT
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Umicore's former mining activities in France
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Battery Materials Solutions
Battery Cathode Materials
Battery Recycling Solutions
Battery Anode Materials
Previous
Catalysis
Automotive Catalysts
Precious Metals Chemistry
Fuel Cell & Stationary Catalysts
Previous
Recycling
Precious Metals Refining
Precious Metals Management
Jewelry & Industrial Metals
Previous
Specialty Materials
Cobalt & Specialty Materials
Electro-Optic Materials
Metal Deposition Solutions
Previous
Agriculture
Animal feed
Fertilizers
Agrochemicals
Previous
Aerospace
Foundry and superalloys
Multi-junction solar cells for satellites
Previous
Automotive & Mobility
Battery materials
Automotive catalysts
Fuel cell catalysts
Tires
Marine propulsion catalysts
Fuel additives
Photonics for automotive
Previous
Electronics & Telecom
Electronic components
LED
Optical fiber
Semiconductors
Microelectronics
Other photonics
Previous
Energy & Batteries
Battery materials
Energy storage
Photovoltaics
Green hydrogen
Previous
Healthcare & Life Sciences
Pharmaceuticals
Diagnostics
Cosmetics
Water treatment
Previous
Industrial & Manufacturing
Industrial emission reduction and control
Industrial chemicals and catalysts
Oilfield chemicals
Tool materials
Protective coatings and plating
Lubricants, greases and fluids
Plastics and polymers
Rubber
Asphalt and bitumen
Glass industry
Paints and coatings
Oxo industry
Previous
Jewelry & Lifestyle
Jewelry
Fashion
Previous
Optics
Infrared optics
Infrared optical filters
Infrared coatings
Ophtalmics
Previous
Precious Metals Trading & Industry
Nexyclus
Investment bars
Industrial metals
Fine precious metals blacks
Coins and blanks
Previous
Recycling Solutions
Precious metals
Battery materials
Previous
Due Diligence Compliance Report Archive
2023 - Due Diligence Compliance Report Archive
2022 - Due Diligence Compliance Report Archive
2021 - Due Diligence Compliance Report Archive
2020 - Due Diligence Compliance Report Archive
2019 - Due Diligence Compliance Report Archive
2018 - Due Diligence Compliance Report Archive
2017 - Due Diligence Compliance Report Archive
2016 - Due Diligence Compliance Report Archive
Previous
Overview of legacy mining sites
Introduction
France
Belgium
Germany
The Netherlands
United States
Previous
Shareholder structure
Share buyback
Disposal of own shares
Old shares
Data per share
Previous
Financial calendar
Past events
Previous
Capital markets events
Capital Markets Day 2025
Registration
At the Core 2023
Capital Markets Day 2022
Capital Markets Day 2018
Capital Markets Day 2015
Previous
Publications & reports
Financial reports
Annual report
Presentations
Previous
Supervisory committees
Nomination & Remuneration
Sustainability
Investment
Audit
Previous
Documents and policies
Addressing and understanding forced labour
Anti-bribery & anti-corruption policy
Articles of association
Code of Conduct
Corporate governance charter
Environmental stewardship policy
Health & safety
Umicore Human Rights Policy
ISO 27001 certification
Modern slavery statement
Our values
Product safety testing & animal welfare policy
Product stewardship
Remuneration policy
Shareholder rights
Supervision and compliance
Tax strategy
Previous
Diversity & Inclusion
Gender equity
Previous
What you could do
Research & development
Engineering & technology
Production & maintenance
Supply chain & logistics
STEM
Safety, health & environment
Finance
Digitalization & IT
Sales, HR & support
General management
Early talent
Previous
Belgium
Start
Previous
Battery Cathode Materials
Start
Locations
Contact
Previous
Battery Recycling Solutions
Start
Pyro-hydro technology
Sustainabillity
Locations
Contact
Previous
Battery Anode Materials
Start
Contact
Previous
Automotive Catalysts
Start
Locations
Contact
Previous
Precious Metals Chemistry
Start
Locations
Contact
Previous
Fuel Cell & Stationary Catalysts
Start
Locations
Contact
Previous
Precious Metals Refining
Start
Commercial services
Metals & products
Process
Sustainabillity
Locations
Contact
Previous
Precious Metals Management
Start
Terms & conditions
Locations
Contact
Previous
Jewelry & Industrial Metals
Start
Locations
Contact
Previous
Cobalt & Specialty Materials
Start
Locations
Contact
Previous
Electro-Optic Materials
Infrared solutions
Germanium solutions
Previous
Metal Deposition Solutions
Start
Locations
Contact
Previous
Battery materials
Electric vehicles
Cobalt and nickel precursors
Previous
Automotive catalysts
Precursors for off-gas treatment catalysts
Light-duty gasoline, hybrid electric, and alternative fuels
Light-duty diesel vehicles
Heavy-duty vehicles
Motorcycles and small engines
Previous
Marine propulsion catalysts
DNX marine
DNA
DNZ
cDPF
Previous
Fuel additives
Fuel borne catalysts
Deposit control additives
Previous
Photonics for automotive
Autonomous driving
Night vision and pedestrian detection
Automotive LED lighting
Vehicle integrated photovoltaics
Previous
Electronic components
Electrical contacts
Connectors
Electrodes for electroplating
Ribbons and wires
Previous
LED
High brightness LEDs
Micro LEDs
Thin film for LED
Previous
Semiconductors
Additives
Previous
Microelectronics
Electrolytes for electroplating
Thin film
GeCL4 precursor for GeH4
Previous
Other photonics
VCSELs
SWIR sensors
3D sensing
LiDAR
AR / VR / MR
Gamma ray detectors
Previous
Battery materials
Portable tools and electronics
Previous
Photovoltaics
Terrestrial CPV
Previous
Pharmaceuticals
Active pharmaceutical ingredients
Pharmaceutical intermediates & fine chemicals
Raw materials
Previous
Industrial emission reduction and control
Power generation
Refining and petrochemical
Chemical and industrial
Previous
Industrial chemicals and catalysts
Water electrolysis
Cobalt salts and precursors
Petrochemical catalysts
Polyester resins
Previous
Tool materials
Diamond tools
Friction materials
Hard metals
High-density materials
Metal injection molding
Shielding materials
Previous
Protective coatings and plating
Wear protection for tool materials
Thermal spray and hardfacing
Corrosion
Sealings
Surface treatments
Wood preservative
Previous
Lubricants, greases and fluids
Detergents
Mineral oil replacements
Lubricant additives
Previous
Plastics and polymers
Plastics and polymers additives
Biopolymers
Packaging and film additives
Polyurethane
Functional materials and polymers
Previous
Rubber
Catalysts
Adhesion promoters
Previous
Glass industry
Special design solutions
Oxides and salts
Previous
Paints and coatings
Paint driers
Binders
Anti-skinning
Pigment dispersant
Bio-solvents
Marine coatings
Previous
Jewelry
Semi-finished and casting
Turned and milled parts
Decorative coatings
Previous
Infrared optics
GASIR®
Tessella™
Thermography
Automotive
Firefighting
Security and surveillance
Marine
Medical imaging
Smart sensing and IoT
Custom thermal imaging lenses
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Infrared optical filters
Narrow band pass
Wide band pass
Long wave pass
Short wave pass
DGA infrared filter wheel complete assembly
How do infrared filters work?
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Infrared coatings
HEAR coatings
HDAR coatings
DLC coatings
iDLC™ coatings
CO2 Laser Coatings
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Nexyclus
Material Segregation
Mass Balance
Book & Claim
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Investment bars
Certificate bar
Gift bars
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Industrial metals
Platinum group metals
Silver and gold
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Precious metals
Copper, lead & zinc industry
PM / PGM refineries
Mining industry
Spent automotive catalysts
Spent industrial catalysts
E-scrap
Incineration bottom ashes
Sweeps, sludges & residues
Other precious metals bearing materials
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France
Umicore's former mining activities in France
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Annual report
Contact us about our annual report
