Why does pH matter for formulations?

pH mismatch can degrade sensitive ingredients like vitamins, enzymes and APIs

Why is oil absorption value important?

Oil absorption determines how much liquid a grade can carry.

What’s the difference between precipitated, gel and fumed silica?

Different manufacturing processes lead to different pore structure, purity and price.

Why is lower heavy metal content safer?

Lead, arsenic and mercury are cumulative toxins with long-term health risks.

Why is lower moisture (LOD) better?

Residual moisture in the silica itself can trigger premature caking.

Why does particle size affect solubility and mouthfeel?

Too coarse = gritty texture; too fine = dusting and agglomeration risk.

Why does silica prevent caking?

Its nano-porous structure forms a physical barrier between powder particles, blocking inter-particle bridging and moisture uptake.

Customer complains of off-odor – what to do?

Moisture / caking on arrival – what to do?

Moisture damage usually occurs during transport or storage.

pH imbalance affecting formulation – how to resolve?

pH mismatch can degrade sensitive ingredients.

Flocculent residue after dissolving – what to do?

Flocculation is usually from pH mismatch or colloidal formation.

Poor flowability – how to fix?

Flowability depends on particle size distribution and moisture content.

Product yellowing – what causes it?

Yellowing is often catalyzed by iron/lead ions or caused by moisture exposure.

Gritty texture or sediment – what to do?

Gritty feel is usually from too coarse particle size or poor dispersion.

Powder still cakes after adding silica – what to do?

Caking is usually related to dosage, particle size, moisture or storage conditions.

Which certification for export to South Korea?

Products with K-REACH pre-registration.

Which grade for probiotic encapsulation in pet feed?

High BET, heat-resistant grade.

Which grade for high-cleaning toothpaste?

Abrasive grade, selected by RDA value.

Which adsorbent for vegetable oil refining?

Gel-process, high-adsorption grade.

Which grade for tablet flow aid?

Fine particle size, good flowability grade.

Which grade for liquid fragrance carrier?

High oil absorption or high BET grade.

Which grade for milk powder anti-caking?

Medium particle size, low moisture, low heavy metal food-grade silica.

Which grades for cosmetics, personal care, home care and crop protection?

Cosmetics use ZLDIO (INCI Silica: scrub/foot powder/soft-focus); home care uses ZLCSIL/ZLSIL/ZOILSIL; crop protection uses ZLCSIL/ZLSIL (WP/WDG carrier 5–35%); all are ISO 16128 na…

Which grades for feed and pet food? Dosage?

Feed-grade ZLSIL/FE series for vitamin premixes, choline chloride, pet food and probiotic carriers; premixes 0.2–3.0%, 50% choline chloride loaded at 33%; FAMI-QS and DB35 feed sta…

How to choose toothpaste silica? What does RDA mean?

Choose by RDA (Relative Dentin Abrasion): high for whitening/strong cleaning, medium for general, low for sensitive teeth/children; thickening grades come in low/medium/high viscos…

Difference between amorphous and crystalline silica? Why is SAS safe?

Crystalline silica has an ordered lattice; inhaling its dust causes silicosis (mining/sandblasting). Amorphous silica is disordered; SAS does not cause silicosis; orally it is 100%…

Is your product a nanomaterial? How do you meet EU nano rules?

No isolated nanoparticles. Our SAS consists of non-separable agglomerates fused from primary particles, with no free nanoparticles; under EU EC 1223/2009, EU 2015/2283 and EU 1169/…

ECHA 2024 proposes SAS as STOT RE 1 (H372)—are you affected? Still buyable?

Our position: we oppose it. SAS is amorphous/non-crystalline, fundamentally different from crystalline silica (which causes silicosis); the proposal relies only on high-dose rat in…

Zhonglian Food Silica

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Why are pilot trials absolutely necessary?

COA compliance does not guarantee finished-product performance.

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