Selecting the right fine chemical raw materials is the cornerstone of high-performance detergents, industrial cleaners, water treatment formulations, and specialty products. This guide—backed by Zhengzhou Clean Chemical Co., Ltd. (expert in detergent & water treatment chemicals) and its subsidiary Henan Tokai Chemical Co., Ltd. (specializing in advanced water treatment chemistries)—provides authoritative insights into sodium metasilicate, emulsifiers, auxiliary agents, and surfactants. Optimize your formulations with science-backed data and practical tables.
Sodium metasilicate (Na₂SiO₃) appears as white crystalline powder, freely soluble in water and dilute alkali, insoluble in alcohol/acid. Its aqueous solution is strongly alkaline (pH buffer capacity), and it tends to absorb moisture in air. With a melting point of 1088 °C and density 2.4 g/cm³, it provides exceptional emulsifying, dispersing, wetting, and detergency properties.
Usage note: Optimal performance at pH ≥12; below pH 12, metasilicate may precipitate as silicic acid.
| Property / Grade | Sodium Metasilicate Pentahydrate (Na₂SiO₃·5H₂O) | Anhydrous Sodium Metasilicate (Na₂SiO₃) |
|---|---|---|
| Appearance | White crystalline powder/granules | White or light grey granular powder |
| Solubility (20°C) | 50 g/100 g water | Readily soluble, high alkalinity |
| Melting point | 72 °C (dehydrates) | 1088 °C |
| Key features | Excellent Mg²⁺ binding (>260 mgMgCO₂/g), anti-corrosion on Al/Zn, good for detergents | Higher active matter, strong oil cleaning directly, ideal for concentrated powders & industrial cleaners |
| Main applications | Laundry powders, dishwashing, metal cleaning, ceramic deflocculant, oil drilling mud adjuster | Heavy-duty degreasers, cement dispersant, textile processing, anti-rust additives |
✔️ Pentahydrate is widely used in phosphate-free and low-phosphate detergents, while anhydrous grade is preferred for concentrated formulations and direct oil/grease removal without surfactants.
Emulsification is the process of dispersing one immiscible liquid into another, stabilized by surface-active agents (emulsifiers). By adsorbing at the oil-water interface, emulsifiers reduce interfacial tension and prevent coalescence. Modern detergent chemistry relies on synergistic emulsifier blends to remove both polar and non-polar soils.
Boosters, sequestrants, and builders enhance detergency, soften water, and provide alkalinity. Below is a practical selection table.
| Compound | Function & Key Characteristics |
|---|---|
| Sodium Tripolyphosphate (STPP) | Heavy oil removal, Ca/Mg sequestering, anti-corrosion on steel. Copper corrosion possible. |
| Sodium Carbonate | Saponifies fats, softens water, pH buffering, eco-friendly. |
| Sodium Silicate (water glass) | Dispersion, anti-redeposition, corrosion inhibition for aluminum. |
| Sodium Sulfate | Filler, enhances surfactant activity, improves powder flow. |
| Borax | Buffering, mild bactericidal action, boosts surfactant efficiency. |
| Chelator / Organic Salt | Performance & Application |
|---|---|
| EDTA-2Na / EDTA-4Na | Strong Ca/Mg/Fe chelation, improves surfactant activity, anti-corrosion, solubilizer. |
| Sodium Citrate | Excellent Fe²⁺/Ca²⁺ sequestrant, non-toxic alternative to phosphates, rust removal. |
| Sodium Gluconate | Superior rust/scale removal, stronger chelation than EDTA on iron (cost higher). |
| HEDP·4Na | Stable chelation of Ca, Mg, Fe, Al, Zn; high alkaline (pH>12) and outstanding degreaser. |
| Sodium Polyacrylate | Dispersant, anti-redeposition, hardness tolerance; different MW for varied effects. |
💡 Tip: For heavy-duty industrial cleaning, combine ABS with sodium polyacrylate to dramatically improve anti-redeposition. For rust inhibition, sodium benzoate is a top choice.
Alcohols, glycol ethers, and alkanolamines act as hydrotropes, co-solvents, and cleaning boosters.
| Category | Examples | Role |
|---|---|---|
| Alcohols | Ethanol, Isopropanol, Glycerol | Penetration enhancement, lowering viscosity, hydrotrope action. |
| Glycol Ethers | Ethylene/propylene glycol ethers (e.g., DPM, DGBE) | Coupling, soil release, cloud point raising. |
| Alkanolamines | Monoethanolamine (MEA), Diethanolamine (DEA), Triethanolamine (TEA) | Alkaline builder, corrosion inhibition, chelation, improve detergency and emulsification. |
Triethanolamine (TEA) is most versatile: pH ~10.7, mild, with excellent coupling and anti-corrosion for ferrous metals.
Surfactants reduce surface tension, emulsify oils, and provide wetting/foaming. The right choice defines cleaning efficiency.
| Type | Example | Key Features |
|---|---|---|
| Sulfonates | LAS (linear alkylbenzene sulfonate), ABS, α-Olefin sulfonate | High detergency, good hard water tolerance; LAS is biodegradable. |
| Sulfates | Sodium lauryl sulfate (K12), AES (alcohol ether sulfate) | Excellent foam, good for personal care and household cleaners. |
| Carboxylates | Soap (C17H35COONa), AEC (alcohol ether carboxylate) | Low foam, defoaming property, mild and eco-friendly. |
| Phosphate esters | Alcohol phosphate esters | Emulsification, hydrotrope, corrosion inhibition (used in industrial lubricants). |
Nonionics provide superior degreasing, low foam options, and are compatible with all surfactant classes. HLB value and cloud point are critical.
| Surfactant | HLB range | Application Highlights |
|---|---|---|
| AEO-9 (Alcohol ethoxylate) | ~13 | Excellent detergent, emulsifier, wetting agent; cold water performance. |
| TX / NP series (Nonylphenol ethoxylates) | 10–18 | Strong emulsification, chemical resistance; lower biodegradability (restricted in some regions). |
| Fatty acid methyl ester ethoxylates (FMEE) | — | Low foam, excellent oil removal, easy rinsing. |
| Alkyl Polyglucoside (APG) | 12–14 | 100% bio-based, mild, good for dishwash and public facilities. |
| Cocamide DEA (Ninol 6501) | — | Foam booster, thickener, anti-corrosion properties. |
⚡ Super Nonionic 226SA: Exceptional dynamic detergency for oil/wax soils; outstanding emulsification and dispersion even at low temperatures.
Amphoterics are mild and compatible; fluorosurfactants (F-C) lower surface tension drastically (~18 mN/m) – used in high-value coatings. Silicone surfactants act as defoamers. For heavy carbon deposit removal, QYL-290 and CP-5 dispersants are industry solutions.
| Target performance | Recommended raw materials |
|---|---|
| High alkalinity & saponification | Sodium hydroxide, sodium carbonate, sodium metasilicate |
| Water softening (Ca/Mg binding) | EDTA, sodium citrate, HEDP-4Na, sodium gluconate |
| Anti-corrosion on aluminum/zinc | Sodium metasilicate pentahydrate, sodium benzoate, triethanolamine |
| Heavy-duty degreasing (mineral oils) | Nonionic AEO-7/AEO-9, 226SA, ABS, Ninol 6501 |
| Low foam & rinse aid | Polyether defoamers, fatty alcohol alkoxylates, silicone emulsions |
| Hydrotrope & solubilization | Sodium xylene sulfonate (SXS), TEA, glycol ethers |
Pentahydrate contains 5 water molecules; it dissolves faster and is milder, perfect for laundry and dishwashing. Anhydrous grade has higher concentration of active Na₂SiO₃, more efficient for industrial degreasers and cement additives. Both are available from Zhengzhou Clean Chemical.
Super nonionic 226SA, AEO-7, and FMEE exhibit strong low-temperature detergency. Blending with a hydrotrope like sodium xylene sulfonate improves performance further.
Absolutely. Our subsidiary Henan Tokai Chemical Co., Ltd. specializes in water treatment chemicals (scale inhibitors, chelating agents, biocides), while Zhengzhou Clean Chemical supplies detergent raw materials, builders, and metasilicates. Together we cover municipal and industrial water treatment needs.
Use sodium citrate or EDTA-4Na as primary builder, plus sodium polyacrylate as co-builder. For high performance, combine with zeolite and sodium metasilicate for alkalinity and dispersion.
With decades of expertise, Zhengzhou Clean Chemical is a leading manufacturer of detergent chemicals, basic inorganics (sodium metasilicate, sodium silicate), and water treatment chemicals. Our products serve global detergent brands, industrial cleaning formulators, and water treatment plants.
Henan Tokai Chemical Co., Ltd. (subsidiary) focuses on advanced water treatment chemicals – corrosion inhibitors, scale control agents, biocides, and polymer dispersants for cooling water, boilers, and reverse osmosis systems.
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✔️ For laundry powder: blend sodium metasilicate pentahydrate + sodium carbonate + LAS/AEO-9 + sodium citrate.
✔️ For heavy-duty industrial degreaser: use anhydrous metasilicate + 226SA + sodium gluconate + triethanolamine.
✔️ For corrosion protection on multi-metal surfaces: sodium metasilicate + sodium benzoate + nonionic surfactants.
✔️ To maximize cleaning at lower temperatures: include short-chain alcohol ethoxylates (AEO-3) and glycol ethers.
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