Dry sodium silicate powder white free-flowing fine powder in glass beaker showing uniform texture and high purity

Powdered Sodium Silicate Modulus 2.8-2.9

Our modulus 2.8-2.9 dry sodium silicate powder is high purity, easy dissolving bulk sodium silicate powder with balanced silica-sodium oxide ratio. This medium-modulus sodium silicate powder dissolves rapidly in cold water without heating, featuring stable alkalinity, low impurity content and outstanding compatibility with surfactants and inorganic additives. Ideal for daily detergent production, general foundry, civil…

Model Numbe

WNF-P28

Other Names

Water Glass Powder, Soluble Glass Powder, Sodium Metasilicate Powder, Silicic Acid Sodium Salt Powder

Molecular Formula

Na2O·nSiO2·mH2O

CAS No.

1344-09-8

EINECS No.

215-687-4

Grade Standard

Industry Grade

Place of Origin

HEBEI,China

Product Details

What is Easy Dissolving Sodium Silicate Powder Modulus 2.8-2.9?

 

Dry sodium silicate powder (CAS 1344-09-8) is a white off-white free-flowing inorganic powder with moderate hygroscopicity that requires sealed moisture-proof storage. As easy dissolving sodium silicate powder, it dissolves rapidly in cold and warm water within minutes without heating, generating homogeneous alkaline aqueous solutions with a pH range of 11.5–12.5. Available as bulk sodium silicate powder for large-scale industrial procurement, this high purity sodium silicate powder gains wide recognition across light industry, construction and water treatment sectors thanks to its convenient dissolution, stable formula and cost-efficient bulk supply.

Easy dissolving sodium silicate powder modulus 2.8-2.9 is a medium-modulus dry sodium silicate powder refined from traditional solid water glass raw materials. Featuring a moderate molar ratio of silica to sodium oxide, this high purity sodium silicate powder fills the market demand for medium-modulus bulk sodium silicate powder, tailored for general industrial scenarios requiring balanced bonding strength, moderate heat resistance and mild chemical reactivity.

Though its high-temperature strength and curing hardness are lower than high-modulus 3.1–3.3 grades, modulus 2.8-2.9 dry sodium silicate powder delivers well-balanced comprehensive performance with lower raw material cost. Its mature application system covers daily chemical cleaning, ordinary construction bonding, light foundry and water purification. The mainstream optimization directions include low-dust granulation modification, anti-caking coating treatment for bulk sodium silicate powder, and compound blending with surfactants to expand usage in low-foam detergent formulas.

 

Introduction to Dry Sodium Silicate Powder

 

Modulus stands for the molar ratio of silicon dioxide to sodium oxide inside sodium silicate, which dominates all core physical and chemical performance indicators of dry sodium silicate powder.

Distinct from high-modulus 3.1–3.3 instant sodium silicate, easy dissolving sodium silicate powder with modulus 2.8-2.9 carries medium silica content, moderate gel forming speed and mild alkalinity, making it safer and easier to compound with most auxiliary chemical raw materials.

This high purity sodium silicate powder presents uniform fine white powder under normal temperature with minimal agglomeration. As typical easy dissolving sodium silicate powder, it fully dissolves in room-temperature water without heating and leaves almost no insoluble sediment. When purchased as bulk sodium silicate powder, it greatly cuts down unit procurement cost for mass production manufacturers.

Modulus 2.8-2.9 dry sodium silicate powder solves prominent drawbacks of liquid water glass including short shelf life, high freight cost and low effective solid content. It combines the merits of easy dissolving performance, moderate bonding force, mild corrosion resistance and stable alkaline buffering capacity. Compared with low-modulus 2.0–2.5 sodium silicate powder, it owns better gelation performance and longer service life after curing, becoming the universal bulk sodium silicate powder choice for medium and conventional industrial production lines.

 

Core Advantages & Characteristics of High Purity Sodium Silicate Powder (CAS 1344-09-8)

 

 

Outstanding easy dissolving property

 

This dry sodium silicate powder adopts loose porous particle structure, which disperses and dissolves quickly once mixed with water. It shortens solution preparation time drastically, lifts downstream production continuity and efficiency, and perfectly matches automatic bulk feeding equipment when ordered as bulk sodium silicate powder.

 

Ultra-high purity & stable formula metering

 

The solid content of high purity sodium silicate powder approaches 100%, with trace free water and strictly controlled heavy metal & insoluble impurities. It guarantees precise, consistent formulation of downstream finished goods, eliminates batch-to-batch quality fluctuation triggered by impurity interference, and meets strict raw material standards for daily chemical and fine chemical production.

 

Superior cost efficiency & storage convenience

 

Supplied as dry sodium silicate powder in solid form, bulk sodium silicate powder saves massive expenditure on liquid packaging, tank transportation and cold storage. It occupies less warehouse space and supports long-distance cross-region transportation and long-term sealed storage, greatly lowering overall logistics and inventory expenses for factories.

 

Stable alkaline buffering plus powerful emulsification & dispersion

 

High purity sodium silicate powder maintains steady weak-to-medium alkaline environment in aqueous system, equipped with premium emulsifying, dispersing and anti-redeposition functions. In detergent manufacturing, it lifts stain removal efficiency; in industrial blending processes, it disperses solid impurities and stabilizes mixed liquid systems, serving as a versatile multi-functional inorganic additive.

 

Operation Guidance for Dry Sodium Silicate Powder

 

Dissolution operation: Under continuous stirring, add easy dissolving sodium silicate powder into water slowly to prepare uniform mother liquor. The recommended working concentration for daily production ranges from 30% to 50%.

Storage requirements: Store bulk sodium silicate powder in cool, dry and ventilated warehouses with fully sealed packaging to avoid moisture absorption and powder caking.

Raw material compatibility: It features excellent synergistic effects when compounded with anionic surfactants, non-ionic surfactants, soda ash, STPP and other conventional inorganic auxiliary agents.

Product Display

Bulk sodium silicate powder in jumbo FIBC bags stacked in warehouse ready for container loading export
High purity sodium silicate powder white free-flowing fine powder in glass beaker with 99 percent total solids label for sensitive applications
Sodium silicate powder with pallet showing 28 bags per pallet stacked and wrapped ready for shipping

Technical Specifications

ItemsUnitProduct parameters
Apperance/White fine powder, free-flowing, no visible impurities
Modulus(n)/2.7-2.9
Total Content (Na₂O + SiO₂)%80-85
SiO₂%59-62
Na₂O%21-23
pH Value (1% Aqueous Solution, 25℃)/11-13
Bulk Densityg/l0.5-0.8
Whiteness/>86

Ultra Fast Dissolving, Fully Adaptable to Automated Production

This easy dissolving sodium silicate powder features loose porous particle structure without hard agglomerates. It dissolves rapidly in cold or room-temperature water without heating, forming uniform transparent alkaline solution within several minutes and leaving no insoluble residues.

High Purity Stable Composition, Ensuring Consistent Batch Quality

As premium high purity sodium silicate powder, its solid content is close to 100% with ultra-low moisture and minimal impurities. The fixed modulus 2.8-2.9 delivers steady silica-sodium oxide ratio, eliminating formula deviation caused by excess water or impurities.

Low Logistics & Storage Cost, Cost-Effective Bulk Supply

In dry sodium silicate powder solid form, it gets rid of the defects of liquid water glass such as heavy weight, high tank transportation fee and short shelf life. Supplied as bulk sodium silicate powder for factory large-scale procurement, it cuts packaging, freight and warehouse occupation costs significantly.

Balanced Alkalinity & Versatile Compatibility, Wide Industrial Applicability

The medium modulus 2.8-2.9 brings mild and stable alkaline buffering capacity, equipped with outstanding emulsification, dispersion, anti-redeposition and moderate gel bonding performance. It has excellent synergistic effect with anionic/nonionic surfactants, sodium carbonate, STPP and other inorganic additives.

Sodium Silicate Powder 2.8-2.9 Modulus Application

·General Foundry & Ordinary Refractory Industry

Modulus 2.8-2.9 easy dissolving sodium silicate powder is the standard bulk sodium silicate powder for small-batch ordinary sand casting and low-temperature refractory binders. Its medium modulus delivers balanced bonding strength and moderate curing speed, widely applied in common casting sand molds, lightweight refractory castables, furnace maintenance coating and ordinary ceramic body bonding. It reduces production cost while satisfying regular molding and medium-temperature service requirements.

·General Fine Chemical Raw Material Manufacturing

This high purity sodium silicate powder acts as economical raw material for producing common silica gel, light precipitated silica and low-grade zeolite adsorbents. Its mild and stable chemical reactivity ensures controllable reaction speed during synthesis, stabilizes finished product quality and lowers production cost, suitable for mass production of industrial adsorbents and ordinary inorganic silicon chemical products.

·Municipal Sewage & Basic Environmental Treatment

Relying on moderate flocculation, adsorption and soil consolidation performance, modulus 2.8-2.9 dry sodium silicate powder is widely used for daily domestic sewage treatment, light metal ion precipitation, road dust suppression and ordinary foundation soil solidification. Its mild alkalinity avoids excessive pH fluctuation of treated wastewater, with stable treatment effect and no harmful secondary residues.

·Ordinary Construction & Waterproof Auxiliary Materials

As a universal reinforcing additive for ordinary concrete, mortar and general waterproof coating engineering. Different from high-modulus sodium silicate for high-strength anti-corrosion projects, modulus 2.8-2.9 bulk sodium silicate powder fits conventional building renovation, indoor floor mortar, general basement anti-seepage treatment and wall hardening. It effectively improves mortar compactness and weather resistance with obvious cost advantages for civil construction projects.

·Mass-Produced Daily Chemical & Detergent Industry

This easy dissolving sodium silicate powder is the mainstream raw material for mass-produced ordinary laundry powder, dishwashing detergent and low-cost phosphorus-free cleaning supplies. It provides reliable alkaline buffering, anti-redeposition and stain dispersion capacity, greatly boosting the detergency of daily cleaning products. As bulk sodium silicate powder, it perfectly matches large-volume continuous production lines of detergent factories and controls overall raw material expenditure effectively.

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Packaging and Storage

Packaging

Our sodium silicate powder / dry powder water glass adopts standard industrial packaging with premium kraft paper bags, including 25kg kraft paper bag packaging specifications, and supports customized packaging and labeling according to customer requirements. All kraft paper bag packages are tightly sealed, moisture-proof and dust-proof, which can effectively prevent powder leakage, moisture caking and product contamination during transportation and storage. As a reliable professional sodium silicate powder supplier, we provide flexible packaging solutions and bulk shipping services for global customers who buy sodium silicate powder.

Storage

Our sodium silicate powder / dry powder water glass should be stored in a cool, dry, and well‑ventilated warehouse environment. Keep the product away from direct sunlight, high temperature, and humid conditions to prevent moisture absorption, caking, and deterioration of chemical performance. The kraft paper bag packaging must be kept tightly sealed during storage and handling. Avoid contact with water, moisture, acid substances, and strong oxidizing agents to maintain stable powder fluidity and original modulus properties. Stacking height should be controlled reasonably to prevent package damage and powder leakage. As a professional sodium silicate powder supplier, we recommend standardized dry storage and regular stock inspection to ensure long-term product quality for customers who buy sodium silicate powder in bulk.

Frequently Asked Questions

What’s the difference between modulus 2.8-2.9 and high modulus 3.1-3.3 instant sodium silicate powder?

Modulus 2.8-2.9 has lower silica content, milder alkalinity and moderate gel strength. It costs less and matches most daily chemical, general casting and civil construction formulas. The 3.1-3.3 high-modulus type features stronger high-temperature bonding and hardness, which is more suitable for refractory, high-strength waterproof and fine chemical high-end production.

Is this easy dissolving sodium silicate powder soluble in cold water?

Yes. As typical easy dissolving sodium silicate powder, it adopts loose porous particle structure. Under stirring, it fully dissolves in room temperature or cold water within minutes without heating, and no insoluble sediment remains when using high purity grades.

How to prepare aqueous solution of this dry sodium silicate powder correctly?

Keep continuous stirring, slowly add powder into water instead of pouring water onto powder. The recommended working concentration is 30%–50%. Avoid rapid one-time feeding to prevent local agglomeration and incomplete dissolution.

What storage conditions does this dry sodium silicate powder require?

Store in cool, dry and well-ventilated warehouses with packages fully sealed. Strictly isolate from humid air, acid materials and rain. If exposed to moisture, the powder will absorb water and form hard lumps, affecting dissolving performance.

Can modulus 2.8-2.9 sodium silicate powder be mixed with surfactants and other additives?

Absolutely. It has excellent compatibility and synergistic effect with anionic surfactants, non-ionic surfactants, soda ash, STPP and other common inorganic auxiliaries, widely used in phosphorus-free detergent compound formulas.

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