Bismuth Trioxide is a high-density, inorganic flame retardant additive used in halogenated and halogen-free polymers. This Dibismuth trioxide enhances flame retardancy and smoke suppression (delays ignition in polymer matrices) and is highly preferred in thermoplastics, cable insulation, and coatings. Also referred to ...
Bismuth oxide (Bi2O3) Specifications
CAS Number
1304-76-3
Molecular Formula
Bi2O3
IUPAC NameORBotanical Name
oxo(oxobismuthanyloxy)bismuthane
Canonical SMILES
O=[Bi]O[Bi]=O
InChI Key
WMWLMWRWZQELOS-UHFFFAOYSA-N
InChI
InChI=1S/2Bi.3O
EINECS Number
215-134-7
HSN No
28259090
CAS Number
1304-76-3
Molecular Formula
Bi2O3
IUPAC NameORBotanical Name
oxo(oxobismuthanyloxy)bismuthane
Canonical SMILES
O=[Bi]O[Bi]=O
InChI Key
WMWLMWRWZQELOS-UHFFFAOYSA-N
InChI
InChI=1S/2Bi.3O
EINECS Number
215-134-7
HSN No
28259090
Molecular Weight
465.959 g/mol
Appearance
Yellow to orange crystalline powder
Density
8.9 – 9.3 g/cm³
Melting Point
~817 °C
Boiling Point
~1890 °C
Solubility
soluble in acids (HCl, HNO₃)
Bi₂O₃ Content
≥ 99.9%
Pb
≤ 0.01%
As
≤ 0.002%
Cu
≤ 0.002%
Fe
≤ 0.002%
Moisture
≤ 0.1%
Particle Size (d50)
1 – 10 µm (custom grades available)
Monoclinic (α-Bi₂O₃)
stable at room temperature
Tetragonal (β-Bi₂O₃)
stable at 645–730 °C
Cubic (δ-Bi₂O₃)
stable above 730 °C
Refractive Index
2.5 – 2.6
Bi (Bismuth) Content
Bi (Bismuth) (%) 89.57
Physical appearance
Yellow monoclinic crystalline powder
GHS Hazard Statements
An irritant, But Not Classified. Reported as not meeting GHS hazard criteria.
Precautionary Statement Codes
P261, P280, and P305+P351+P338
Hazard Classes and Categories
Skin Irrit. 2 (9.3%)
Eye Irrit. 2 (9.3%)
Polymer Flame Retardancy
Bismuth Trioxide acts as a synergist for halogenated polymers (PVC, ABS), enhancing flame resistance.
Glass & Ceramics
Replaces toxic lead oxides in optical glass, radiation shielding glass, and glazes
Used in ceramic glazes for brilliance and color development
Electronics & Catalysts
Used in varistors, ferrites, oxygen sensors, and solid oxide fuel cells (SOFCs)
Catalyst in oxidation and polymerization reactions
Pigments & Coatings
Component of yellow, orange, and red pigments
Enhances optical and protective coatings
Metallurgy
Fluxing agent in metallurgical processes
Used in manufacture of bismuth alloys
Pharmaceuticals & Cosmetics
Limited use in specialized formulations as a non-toxic alternative to lead compounds
Electronic Ceramic Additive
An additive used in the production of zinc oxide varistors, ceramic capacitors, and ferrite magnetic materials to improve performance and reduce costs
Photocatalyst
A material utilized for water purification and hydrogen production through photocatalytic water splitting
Electrolyte Material
A component used in the fabrication of electrolytes or cathodes for solid oxide fuel cells (SOFC)
Radiosensitizer
A chemical agent that increases the radiation effect on cell viability for medical treatments
Diagnostic Agent
A contrast agent used in X-ray computed tomography (CT) and fluorescence imaging
Pyrotechnic Colorant
A compound used to produce the dragon's eggs effect in fireworks as a non-toxic replacement for lead
Electrode Material
A high-capacity material used for rechargeable aqueous metal-ion batteries and supercapacitors
Optical Coating
A high refractive index material used for enhancing the efficiency of solar cells and in thin-film coatings for optoelectronic devices
Dental Cement Component
A material used in dental repairing applications to provide bone-like X-ray opacity
Catalyst
A catalytic material used for chemical processes such as propylene oxidation and methane conversion
Safe storage
Store in cool, dry, well-ventilated area. Keep containers tightly closed to prevent contamination and moisture uptake
Description : Bismuth Pentoxide (Bi₂O₅) is an inorganic metal oxide flame retardant used as a synergist in polymer systems. CHEMBL2474199 enhances thermal stability, char formation, and smoke suppression in halogenated and halogen-free polymers such as PVC, ABS, and engineering plastics requirements. Supplied in technical grade for industrial formulations, coatings, and R&D. We are the trusted bismuth Pentoxide suppliers worldwide, with reliable lead times and global supply capability.
Description : Zinc Borate is a high-performance, white crystalline mineral additive universally used as a halogen-free flame retardant synergist, smoke suppressant, and polymer stabiliser, available in both zinc borate hydrated (CAS 1332-07-6) for standard processing under 290°C and zinc borate anhydrous (CAS 10361-94-1) for high-temperature engineering plastics processed above 300°C. While the hydrated grade dynamically releases chemically bound water to suppress smoke and cool fires, the anhydrous grade prevents high-heat polymer degradation and builds a robust protective char layer, meaning both grades effectively enhance fire resistance, smoke suppression, and thermal stability in PVC, polyolefins, elastomers, and coatings applications. Supplied as an industrial-grade powder or granular material, zinc borate is used extensively in industrial polymer compounding, cable insulation, and coatings manufacturing, delivering premium functional capabilities to meet strict regulatory fire standards. Also referred to as ZINC BORATE [HSDB] & ZINC BORATE [WHO-DD] by global manufacturers, we are the leading, trusted inorganic zinc borate supplier worldwide, providing both hydrated and anhydrous grades with reliable lead times and global supply capability.
Metal Oxides & Synergists, Critical metals & Strategic materials
Sub-Category
Metal additives, Bismuth Compounds
Description : Bismuth granular (CAS 7440-69-9) is an essential high purity fine chemical utilized in the API intermediates market for the synthesis of gastrointestinal pharmaceuticals and radiopaque agents, meeting the rigorous demands of the growing CDMO sector (Pharma/API purity 99% | General Industry purity 98%). Metallic bismuth serves as a sustainable alternative to lead in metallurgical applications and specialized alloys, benefiting from global sourcing shifts toward non-toxic bulk chemical supplier materials (Pharma/API purity 99% | General Industry purity 98%). Crystalline bismuth is increasingly sought for custom synthesis services in the semiconductor and superconductor industries, where precise regulatory compliance and impurity control are paramount for advanced electronic components (Pharma/API purity 99% | General Industry purity 98%). As globally established Bismuth metal granular supplier, we ensure dependable supply, consistent quality, and complete regulatory documentation, including CoA and TDS across all grades. Beyond supply, we support partners through the entire product lifecycle from route scouting, process and formulation development, and analytical method development to scale-up, process optimisation, and pilot-to-commercial manufacturing. Our teams also assist with GMP-compliant quality assurance, regulatory documentation, and global supply chain and logistics coordination.
Processing salts, Water Treatment - Sulfate Removal Agents
Description : Barium Chloride (BaCl2) is an inorganic salt universally used in chemical manufacturing, water treatment, and industrial applications requirements.Barium Chloride Anhydrous (Water-Sensitive Polymers) is added as a synergistic filler or heat-stabilising additive in plastics, resins, and synthetic polymers. BaCl2 is primarily employed in flame retardants, pigments, and analytical chemistry. Barium chloride is supplied in technical and analytical grades, ensuring consistent quality for industrial B2B use, polymer additives, and water treatment formulations. Also referred to as Bichloride of Barium, Barium Chloride Dihydrate (8CI); Barium Chloride (BaCl2) Hydrate; Barium Dichloride Dihydrate, it is stable and easy to handle under controlled conditions. BaCl2 available in two variables: anhydrous barium chloride (BaCl₂) and barium chloride dihydrate (BaCl₂·2H₂O). We are the trusted barium chloride supplier worldwide with reliable lead times and global supply capability.
Antimony-based synergists, High Purity Metals, Compounds & Powders
Description : Metallic antimony powder serves as a high-performance flame-retardant synergist, alloying additive for lead-acid battery grids, and specialty dopant in semiconductor electronics. Reduction of purified antimony trioxide or pyrometallurgical refining yields finely divided stibium powder with tightly controlled particle size distribution, controlling reactivity in metallurgical and chemical synthesis routes. Industrial procurement emphasizes elemental purity, minimal oxide surface contamination, and strict particle classification to optimize dispersing properties in flame-retardant polymer matrixes. As globally established Antimony Powder supplier with Antimony Powder 99%, scimplify ensures dependable supply, consistent quality, and complete regulatory documentation, including Antimony Powder CoA and Antimony Powder TDS across all grades. Beyond supply, we support partners through the entire product sourcing framework from scouting, process development, pilot-to-commercial manufacturing of Antimony Powder. We support procurement with region specific compliances, GMP quality assurance with Antimony Powder sds, regulatory documentation, global supply chain capabilities and logistics coordination
