Black Mica (Biotite) CAS NO 114733-90-3

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CAS No.:114733-90-3

Grade:Pharmacy Grade

Content:99.9%

Brand:Customizable

Packaging:Customizable

Description

Black Mica (Biotite) CAS NO 114733-90-3 is a naturally occurring phyllosilicate mineral belonging to the mica group, prized for its distinctive dark color, perfect basal cleavage, and layered structure. This material is valued for its unique combination of thermal stability, electrical insulation, and chemical inertness, making it a versatile functional filler and additive. It is essential for manufacturers in the coatings, plastics, construction, and cosmetics industries seeking to enhance product performance with a natural, plate-like mineral.

Application

As a functional filler and reinforcement agent in polymer composites and engineering plastics to improve dimensional stability and reduce gas permeability.
As a pearlescent pigment and filler in cosmetic formulations, including eyeshadows, foundations, and nail polishes, to provide shimmer and improve texture.
As an additive in industrial and protective coatings to enhance barrier properties, corrosion resistance, and weatherability.
In construction materials, such as joint compounds, sealants, and gypsum boards, to improve workability, crack resistance, and fire-retardant properties.
As a dielectric material and insulating component in the electronics industry.
In drilling fluids for the oil and gas industry as a weighting agent and for controlling fluid loss.
In automotive applications, including underbody coatings and brake linings, for thermal and acoustic insulation.
As a soil amendment in agriculture to improve potassium content and soil structure.

Basic Information


Product Name	Black Mica (Biotite)
CAS No.	114733-90-3
Molecular Formula	K(Mg,Fe)3(AlSi3O10)(F,OH)2
Molecular Weight	Varies (Complex Silicate)
Synonyms	Biotite; Iron Mica; Black Mica; Magnesium Iron Mica; Dark Mica; Mica, Black; Mica Group Mineral; Phyllosilicate Mineral; Potassium Magnesium Iron Aluminum Silicate Hydroxide Fluoride
EINECS	Contact for details

Quality Control

Our Black Mica (Biotite) is processed and graded to meet stringent quality parameters for consistency and performance. We employ rigorous quality testing protocols, including particle size distribution (PSD) analysis, chemical composition verification, and purity assessments. While specific grades may vary, our standard quality commitment ensures the material is free from excessive impurities. Certificates of Analysis (COA) detailing lot-specific results are available upon request to support your quality assurance and regulatory needs.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at room temperature (15-25°C). Keep the container tightly sealed when not in use to minimize exposure to atmospheric moisture. Store away from incompatible materials.

Specification

Item	Specification
Appearance	Dark Brown to Black Flakes or Powder
Identification (XRD)	Complies (Characteristic for Biotite)
Particle Size (D50)	10 - 250 µm (Various grades available)
Moisture Content	< 2.0 %
Loss on Ignition (LOI)	Contact for details
SiO2 Content	> 35 %
Fe2O3 Content	> 20 %
Heavy Metals (as Pb)	< 20 ppm