Black Mica (Biotite) CAS NO 116768-20-8

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CAS No.:116768-20-8

Grade:Pharmacy Grade

Content:99.9%

Brand:Customizable

Packaging:Customizable

Description

Black Mica (Biotite) is a common phyllosilicate mineral belonging to the mica group, recognized by its dark color and perfect basal cleavage. This naturally occurring sheet silicate is valued for its unique combination of thermal stability, electrical insulation, and chemical inertness, making it a versatile functional filler and additive. It serves critical roles in industries such as construction, where it acts as a filler and reinforcement, and in coatings, plastics, and cosmetics, where it provides pearlescent effects, improves barrier properties, and enhances durability.

Application

As a functional filler and reinforcement agent in plastics, rubber, and polymer composites to improve mechanical strength and thermal stability.
As a pearlescent pigment and extender in automotive paints, industrial coatings, and decorative cosmetics to create shimmering visual effects.
As a raw material in the production of welding rods and as a coating to improve slag detachability and arc stability.
As an additive in construction materials, including joint compounds, sealants, and gypsum boards, to control shrinkage and improve workability.
As a soil conditioner and a source of potassium in certain agricultural and horticultural applications.
In well-drilling fluids as a weighting agent and viscosity modifier due to its plate-like structure.
As a substrate or inert carrier in various catalyst systems and specialty chemical formulations.

Basic Information


Product Name	Black Mica (Biotite)
CAS No.	116768-20-8
Molecular Formula	K(Mg,Fe)3(AlSi3O10)(F,OH)2
Molecular Weight	Varies (Complex silicate structure)
Synonyms	Biotite; Iron Mica; Black Mica; Magnesium Iron Mica; Dark Mica; Mica (Biotite); Mica, Black; Mica Group Mineral; Phyllosilicate Mineral
EINECS	Contact for details

Quality Control

Our Black Mica (Biotite) is processed and graded to meet stringent quality parameters for industrial applications. 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 batch-to-batch consistency. A Certificate of Analysis (COA) detailing key specifications is 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 to minimize exposure to atmospheric moisture, as the material can be slightly hygroscopic. Store away from strong acids and oxidizing agents.

Specification

Item	Specification
Appearance	Dark brown to black flaky powder
Identification (XRD)	Complies (Characteristic for Biotite)
Particle Size (D50)	10 - 250 µm (Grade dependent)
Moisture Content	≤ 2.0 %
Loss on Ignition (LOI)	≤ 5.0 %
SiO2 Content	≥ 35 %
Fe2O3 Content	≥ 20 %
Heavy Metals (as Pb)	≤ 20 ppm