Description

Vermiculite CAS NO 77430-85-4 is a naturally occurring, hydrated laminar magnesium-aluminum-iron silicate mineral that undergoes significant exfoliation upon heating. This unique property makes it an exceptionally valuable industrial material, prized for its lightweight nature, high-temperature resistance, and excellent absorbency. It is a critical component for manufacturers and processors across diverse sectors seeking reliable, inert, and versatile performance. Key industries that utilize vermiculite include construction, horticulture, agriculture, and industrial insulation.

Application

• Construction & Fire Protection: As a lightweight aggregate in plasters, concrete, and sprayed coatings for fireproofing and acoustic insulation.
• Horticulture & Hydroponics: Used as a soil amendment or standalone growing medium to improve aeration, moisture retention, and nutrient delivery.
• Industrial Insulation: Serves as a high-temperature loose-fill or formed board insulation for furnaces, kilns, and piping.
• Packaging: Employed as a lightweight, absorbent, and protective cushioning material for shipping sensitive goods.
• Agriculture & Animal Feed: Acts as a carrier for pesticides, fertilizers, and animal feed additives due to its absorbent properties.
• Filtration & Absorbents: Utilized in oil and chemical spill cleanup, as well as in filtration processes for liquids and gases.
• Specialty Additives: Incorporated into paints, coatings, and sealants to enhance fire resistance and reduce density.

Basic Information

Product Name	Vermiculite
CAS No.	77430-85-4
Molecular Formula	(Mg,Fe,Al)3(Al,Si)4O10(OH)2·4H2O (Approximate)
Molecular Weight	Varies (Complex Silicate Mineral)
Synonyms	Exfoliated Vermiculite; Micaceous Vermiculite; Hydrated Magnesium Aluminum Iron Silicate; Thermiculite® (Trade Name); Zonolite® (Trade Name); Plaster Sand; Horticultural Vermiculite; Insulation Grade Vermiculite
EINECS	Contact for details

Quality Control

Our Vermiculite is sourced and processed to meet stringent quality parameters for specific industrial applications. We offer various grades (e.g., horticultural, construction, industrial) each with defined specifications for particle size distribution, exfoliation ratio, bulk density, and pH. Certificates of Analysis (COA) detailing lot-specific data are available upon request to ensure traceability and compliance with your project requirements.

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 away from strong acids and moisture to maintain product integrity and prevent caking. Store separately from incompatible materials.

Specification

Item	Specification
Appearance	Golden to brown laminar flakes or exfoliated granules
Bulk Density (Exfoliated)	64 - 160 kg/m³ (4 - 10 lb/ft³) (Grade Dependent)
Particle Size	Fine, Medium, Coarse, or Super Coarse grades available
pH (in water)	6.0 - 9.0
Moisture Content	< 3.0 %
Loss on Ignition	4 - 12 %

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