Description

Bismite CAS NO 1318-21-4 is a naturally occurring mineral form of bismuth trioxide (Bi₂O₃), serving as a primary industrial source of bismuth. This compound is valued for its high thermal stability, low toxicity, and distinctive electrical properties, making it a critical raw material in advanced manufacturing. It is essential for producers of electronic ceramics, specialized glass, pigments, and catalysts who require a reliable, high-purity bismuth feedstock.

Application

• Electronic Ceramics & Varistors: A key component in zinc oxide varistors (ZNR) for surge protection and in multilayer ceramic capacitors (MLCCs) due to its low melting point and electrical characteristics.
• Specialty Glass & Optics: Used in the production of heavy flint glass, radiation-shielding glass, and optical glasses where it increases density and refractive index.
• Inorganic Pigments & Coatings: Employed as a yellow pigment (Bismuth Vanadate precursor) and in pearlescent effects for automotive and high-quality industrial coatings.
• Catalyst Manufacturing: Acts as a catalyst or catalyst precursor in selective oxidation processes and in the production of acrylic fibers.
• Pyrotechnics & Smoke Compositions: Utilized to create a gray smoke effect in military and civilian pyrotechnic formulations.
• Bismuth Metal Production: The principal ore for the extraction and refining of metallic bismuth, used in low-melting-point alloys, pharmaceuticals, and cosmetics.
• Fire Retardant Synergist: Incorporated into polymer systems to enhance the efficacy of other flame retardants.

Basic Information

Product Name	Bismite
CAS No.	1318-21-4
Molecular Formula	Bi₂O₃
Molecular Weight	465.96 g/mol
Synonyms	Bismuth(III) oxide; Bismuth trioxide; Bismuth sesquioxide; Dibismuth trioxide; Bismuth yellow; C.I. 77160; Bismite (mineral); Bismuth oxide
EINECS	215-236-7

Quality Control

Our Bismite is produced and tested under a stringent quality management system to ensure batch-to-batch consistency and high purity. We provide comprehensive Certificates of Analysis (COA) with each shipment, detailing key parameters such as assay, heavy metal content, and particle size distribution where applicable. Our quality commitment aligns with industrial and electronic grade standards to meet the precise demands of advanced material synthesis.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at room temperature (15-25°C). Keep the container tightly sealed to minimize exposure to atmospheric moisture and carbon dioxide. Store away from incompatible materials such as strong reducing agents.

Specification

Item	Specification
Appearance	Yellowish powder
Identification (XRD)	Conforms to Bi₂O₃ (α-phase/β-phase)
Assay (Bi₂O₃)	≥ 99.0 %
Loss on Drying	≤ 0.5 %
Chloride (Cl)	≤ 0.01 %
Sulfate (SO₄)	≤ 0.02 %
Heavy Metals (as Pb)	≤ 10 ppm
Arsenic (As)	≤ 5 ppm
Particle Size (D50)	Contact for details

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.