Diatomaceous Earth

Filter Aid Grade · Industrial Grade — Bulk supply across India & International Markets

What is Diatomaceous Earth?

Diatomaceous Earth (DE) is a naturally occurring, soft sedimentary rock composed of the fossilised remains of diatoms, a type of single-celled algae with silica-based cell walls. When ground into a fine powder, it reveals a remarkable microscopic structure of tiny, porous particles riddled with microscopic holes and channels, giving Diatomaceous Earth its exceptional filtration, absorption, and functional filler properties that are difficult to replicate with synthetic materials.

Polychem Industries supplies Diatomaceous Earth in filter aid grade and industrial grade to beverage and food processing companies, swimming pool equipment suppliers, paint manufacturers, and agricultural input companies across India and internationally. Its natural porous structure makes it one of the most effective and widely used filtration media in industries ranging from brewing to water treatment.

Available Grades

GradeFormPurityStandardApplications
Filter Aid GradeOff-white to light grey fine powder90%+ SiO2 content (natural mineral)Industrial / FiltrationBeverage filtration, swimming pool filters, industrial filtration
Industrial / Functional Filler GradeFine powder90%+ SiO2IndustrialPaint filler, insecticide carrier, absorbent

Applications & Uses

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Beverage & Liquid Filtration

One of the most important applications. Diatomaceous Earth is widely used as a filter aid in beer, wine, fruit juice, and other beverage filtration processes, effectively removing fine particles and yeast cells while maintaining good clarity and flow rates.

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Swimming Pool Filtration

Used extensively in swimming pool filtration systems (DE filters), providing exceptionally fine filtration that removes very small particles from pool water, resulting in noticeably clearer water compared to sand filtration alone.

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Agricultural & Pesticide Carrier

Used as a carrier material for pesticide and insecticide active ingredients, and in its natural, food-grade form, as a non-toxic insecticide itself, where its abrasive and desiccant action is effective against certain crawling insects.

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Paint & Coating Filler

Used as a functional filler and matting agent in paint and coating formulations, contributing to flatting effect, anti-blocking properties, and improved scrub resistance in certain coating applications.

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Industrial Filtration

Used in various industrial filtration applications including oil, chemical, and pharmaceutical processing, where its fine, porous structure provides effective particle removal from liquid streams.

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Absorbent & Carrier Applications

Used as an absorbent for liquid spills in industrial settings, and as a carrier material in various powder formulations where its high surface area and absorbency are functionally useful.

Technical Specifications

Diatomaceous Earth — Key Properties

Chemical FormulaSiO2 (primarily amorphous silica, fossilised diatom remains)
CAS Number61790-53-2
Molecular WeightVariable (natural mineral)
AppearanceOff-white to light grey fine powder
Purity90%+ SiO2 content (natural mineral)
Particle StructurePorous, microscopically perforated diatom shells
Density / Bulk DensityBulk density: 0.2–0.4 g/cm3
pH7.0 – 9.0 (10% slurry)
Packaging Available25 kg bags
StorageStore in cool, dry place away from moisture. Avoid generating dust during handling — use appropriate dust control measures.

Why Source Diatomaceous Earth from Polychem Industries?

  • Filter Aid Grade and Industrial Grade available with full documentation
  • Certificate of Analysis available on request
  • Exceptional natural filtration performance for beverage and pool applications
  • Reliable bulk supply for filtration and paint industry customers
  • Competitive pricing with consistent quality
  • Export documentation experience for international shipments

Frequently Asked Questions

Why is Diatomaceous Earth so effective as a filter aid?
Diatomaceous Earth's effectiveness as a filter aid comes from the unique microscopic structure of fossilised diatom shells, which are riddled with tiny pores and channels. When formed into a filter cake, these particles create a highly porous yet fine filtration medium that can capture extremely small particles while still allowing reasonable liquid flow rates, making it superior to many other filtration media for clarifying beverages and other liquids.
What is the difference between food-grade and industrial-grade Diatomaceous Earth?
The key difference relates to the crystalline silica content and processing method. Food-grade Diatomaceous Earth used in beverage filtration is typically calcined or flux-calcined under controlled conditions and meets food safety purity standards with controlled crystalline silica content. Industrial grade may have different processing and is intended for non-food applications such as paint fillers or absorbents where food-contact purity standards are not required.
What precautions should be taken when handling Diatomaceous Earth powder?
When handling Diatomaceous Earth, especially calcined grades, it is important to minimise dust generation and use appropriate respiratory protection, as inhalation of fine dust over prolonged periods should be avoided as a standard industrial hygiene practice. Working in well-ventilated areas and using dust control measures during handling and transfer operations is recommended.
Do you export Diatomaceous Earth outside India?
Yes. We export to Bangladesh, Sri Lanka, Nepal, Bhutan, and South Africa with full export documentation. Contact us for export pricing and lead times.

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