Description

Vermiculite CAS NO 1318-00-9 is a naturally occurring, hydrated laminar magnesium-aluminum-iron silicate mineral known for its exceptional ability to expand significantly when heated. This expansion process, called exfoliation, creates a lightweight, inert, and highly absorbent material with excellent thermal insulation and cation exchange properties. It is a critical industrial mineral used globally in construction, horticulture, agriculture, and as a specialty carrier or filler.

Application

• Construction & Insulation: As a key component in lightweight plasters, concrete, and spray-applied fireproofing, providing thermal and acoustic insulation.
• Horticulture & Soil Amendment: Used as a sterile, pH-neutral growing medium in hydroponics and soil mixes to improve aeration, drainage, and moisture retention.
• Agriculture: Employed as a carrier for fertilizers, pesticides, and herbicides, and as a soil conditioner to enhance seed germination and root growth.
• Industrial Absorbents: Utilized for spill cleanup of oils, chemicals, and hazardous liquids due to its high absorbency and non-combustible nature.
• Packaging: Acts as a lightweight, resilient, and insulating loose-fill material for the safe transport of sensitive goods.
• Foundry & Steel Industry: Serves as an insulating cover for molten metals to reduce heat loss and minimize oxidation.
• Animal Feed Additive: Used as an anti-caking agent and pellet binder in feed formulations.
• Specialty Filler: Incorporated into paints, coatings, and gaskets to provide fire resistance and improve texture.

Basic Information

Product Name	Vermiculite
CAS No.	1318-00-9
Molecular Formula	(Mg,Fe,Al)3(Al,Si)4O10(OH)2·4H2O
Molecular Weight	Approx. 500 g/mol (variable)
Synonyms	Exfoliated Vermiculite; Micafil; Zonolite; Hydrated Magnesium Aluminum Iron Silicate; Expanded Vermiculite; Thermolite; Horticultural Vermiculite; Vermiculite Ore
EINECS	215-288-5

Quality Control

Our Vermiculite is sourced and processed under strict quality protocols to ensure batch-to-batch consistency for industrial applications. Quality is assessed against key physical parameters including expansion ratio, bulk density, particle size distribution, pH, and moisture content. While we offer various commercial and horticultural grades, Certificates of Analysis (COA) detailing lot-specific data are available upon request to meet your procurement and compliance needs.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated warehouse away from incompatible materials. Keep containers sealed when not in use to prevent moisture absorption and contamination. The recommended storage temperature is between 15-25°C.

Specification

Item	Specification
Appearance	Golden to brown, laminar flakes or granules
Expansion Ratio (Typical)	8:1 to 12:1
Bulk Density (Exfoliated)	60 - 130 kg/m³
Particle Size (Grade Dependent)	Fine (0.5-1 mm) to Coarse (4-8 mm)
pH (in water)	6.0 - 9.0
Moisture Content (as shipped)	< 5%
Loss on Ignition	4 - 10%

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