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Bismuth pentoxide

Bismuth pentoxide

CAS Number: 35984-07-7

Molecular Formula: Bi2O5-10

Flame Retardant SynergistHigh-Purity GradeLaboratory Grade

About Bismuth pentoxide

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 ...

Bismuth pentoxide Specifications

CAS Number
35984-07-7
Molecular Formula
Bi2O5-10
Molecular Weight
497.96 g/mol
IUPAC Name
bismuth(V) oxide
Canonical SMILES
[O-2].[O-2].[O-2].[O-2].[O-2].[Bi].[Bi]
InChI Key
HTROKOLGSIQOJP-UHFFFAOYSA-N
InChI
1S/2Bi.5O/q;;5*-2
EINECS Number
215-134-7
MDL Number
MFCD00003462
UNSPSC Code
12352303
HSN No
2825.90.21
Molecular Weight
497.96 g/mol
Appearance
Yellow orange to reddish-brown powder
Melting Point
~400–450 °C (decomposes)
Solubility
Soluble in strong acids
Stability
Thermally unstable, decomposes to Bi₂O₃ + O₂ upon heating
Bi₂O₅ Content
≥ 98–99%
Pb
≤ 0.05%
As
≤ 0.01%
Fe
≤ 0.02%
Moisture
≤ 0.5%
Particle Size
d50 = 1 – 5 µm (depending on synthesis method)
GHS03
Oxidizer; Can ntensify fire or cause explosions when in contact with combustible materials
GHS07
Indicates acute toxicity (Category 4) or skin/eye/respiratory irritation
Hazard (H) Statements Code
H272, H315, H319, H335
Precautionary (P) Statements Code
P210, P220, P261, P280, P305 + P351 + P338

Polymer Flame Retardancy

Synergist in PVC, ABS, and other thermoplastics.

Smoke and Fire Suppression

Reduces smoke density and increases ignition resistance.

Flame Retardants (Experimental/Synergist)

Smoke suppressant and oxidizing synergist with halogenated & phosphorus flame retardants. Converts to Bi₂O₃ while releasing oxygen, which modifies burning pathways

Catalysts

Oxidation catalyst in organic synthesis and petrochemicals. Also Oxidative coupling reactions Studies.

Electronics & Energy Specific

Investigated for solid-state ion conductors, fuel cells, and oxygen sensors. High oxidation potential (specialty electronic devices)

Advanced Materials

Nanomaterials, photocatalysts, and environmental remediation

Bismuth pentoxide FAQs

Minimum Order Quantity

25 kg (pilot) · 1 MT (commercial)

Lead Time

3 – 5 weeks ex-works

Incoterms

FOB · CIF

Packaging

20 L pails, 200 L HDPE drums, 1000 L IBC

Regional Availability

India · EU · Middle East · Southeast Asia

Documentation

SDS · COA · TDS available on request

Compliance & Quality

REACH registered*

GHS/SDS available

ISO 9001:2015 site*

RoHS compliant*

Global sourcing network

Consistent quality & reliability

End-to-end technical support

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