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Sodium Orthosilicate
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Metasilicates

Sodium Orthosilicate

Highly alkaline sodium orthosilicate for aggressive degreasing, heavy-duty cleaning and industrial descaling applications.

Sodium Orthosilicate
Product Overview

The most alkaline silicate in the range.

Sodium orthosilicate carries a higher alkali-to-silica ratio than metasilicate, which makes it the most strongly alkaline product in the silicate family. It is chosen where soil, grease or scale is heavy enough that metasilicate alkalinity alone is not sufficient.

Typical use is in heavy industrial degreasing, tank and equipment cleaning, and descaling compounds. Because of its strength it is handled with proper protective equipment and dosed carefully in formulation.

Properties & Advantages
01

Very high alkalinity

Attacks heavy grease, carbon and organic soil quickly.

02

Effective descaling

Used in compounds for scale removal from industrial equipment.

03

Strong saponification

Converts fatty soils into readily rinsed soaps.

04

Concentrated dosing

Low addition rates achieve high working alkalinity.

Technical Specifications

Detailed chemical and physical properties

Parameter Specification Range
Appearance White uniform beaded / white powder
Na₂O Content 51.5 – 55.5%
SiO₂ content 26.5 – 29.5%
Molar Ratio (SiO₂/Na₂O) 0.49 – 0.59
pH (1% Solution) 12 – 13
Dry Matter 96 – 98%
Bulk Density 850 – 1100 g/L
Whiteness 85% Min
Water Insoluble 0.05% Max
Solubility Soluble in water
Molecular Weight 184.04 g/mol
CAS No. 13472-30-5

Custom packing and quality specifications available on request.

Main Applications

Where this grade is used.

01

Heavy industrial degreasing

Removal of heavy grease and carbon deposits.

02

Tank & equipment cleaning

Alkaline cleaning of process vessels and plant equipment.

03

Descaling compounds

Component in industrial descaling formulations.

04

Metal preparation

Aggressive pre-cleaning before further surface treatment.

Industries Served

Sectors buying this grade.

Metal treatment Detergents & cleaning Foundry Water treatment
Packaging Options

Dispatched the way you need it.

HDPE bags
Jumbo bags
Customized industrial packaging on request

Exact pack sizes on confirmation.

Quality Assurance

Batch tested before it leaves.

Every batch is checked in our own laboratory against the specification the customer approved, and a retained sample is filed so repeat orders can be traced back to source.

Quality & certifications →

Documentation

Technical and safety datasheets for Sodium Orthosilicate.

Files to be linked.

Product Enquiry

Ask for a quote on Sodium Orthosilicate.

Share your quantity, target specification and delivery location — our technical team will revert with a landed price.

Business hours
Mon – Sat · 10:00 – 19:00 IST
Related Products

Often specified alongside.

All products
Metasilicates

Metasilicate Anhydrous

Anhydrous sodium metasilicate with high active alkalinity and low moisture, for concentrated degreasing and pre-treatment formulations.

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Metasilicates

Metasilicate Pentahydrate

Free-flowing crystalline sodium metasilicate pentahydrate — a controlled-alkalinity builder for detergent powders and industrial cleaners.

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Sodium Silicates

Sodium Silicate Liquid

Clear alkaline silicate solution supplied in neutral and alkaline grades for adhesives, paper, textile, foundry and water-treatment processes.

View product →

Need a product tailored to your application?

Tell us the process you are running and we will recommend — or adjust — a grade to suit it.

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