Calcium Chloride and Sodium Silicate Foundry Binder
A mixture of calcium chloride and sodium silicate used as a binder in foundry mold preparation to harden sand molds for metal casting. This product falls under HTS 3824.99.39 as a mixture of two or more inorganic compounds prepared for industrial foundry applications, not elsewhere specified. It provides strong adhesion and heat resistance during casting processes.
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More Specific Codes
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If contains organic surface-active agents
Binders with added organic surfactants for better dispersion classify under organic surface-active preparations rather than pure inorganic mixtures
If primarily organic composition
Shifts to other chemical mixtures if organic compounds predominate over inorganic components
If sold as individual coloring compounds
Pure inorganic coloring matters without mixing for foundry use fall under Chapter 28 salts
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Import Tips & Compliance
• Verify exact compound ratios meet 'mixture of two or more inorganic compounds' criteria to avoid reclassification; obtain supplier certifications for foundry-grade purity; ensure SDS includes EPA waste disposal instructions to prevent customs holds
Related Products under HTS 3824.99.39
Sodium Silicate and Potassium Silicate Mold Binder
Liquid binder combining sodium silicate and potassium silicate for core production in metal foundries, offering rapid setting and high-temperature stability. Classified under HTS 3824.99.39 as a specific mixture of inorganic silicates designed for foundry mold/core binding, distinct from single-compound preparations. Enables precise casting of complex metal parts.
Zircon Flour and Sodium Hexametaphosphate Slurry Additive
Mixture of finely ground zircon (zirconium silicate) flour and sodium hexametaphosphate used as a deflocculant and binder stabilizer in foundry slurries for investment casting. HTS 3824.99.39 applies to this inorganic compound blend prepared specifically for mold-making processes. Improves slurry fluidity and shell strength in precision casting.
Bentonite Clay and Calcium Hydroxide Core Sand Additive
Powdered mixture of bentonite clay (aluminosilicate) and calcium hydroxide designed to enhance green strength and collapsibility of foundry core sands. Falls under HTS 3824.99.39 as a prepared blend of inorganic compounds for foundry mold/core production. Critical for producing defect-free metal castings.
Graphite Powder and Sodium Lignosulfonate Dispersant
Specialty mixture of micronized graphite powder and sodium lignosulfonate for coating foundry molds, providing lubricity and release properties. Although containing organic lignosulfonate, classified under HTS 3824.99.39 when inorganic graphite predominates in foundry preparations. Prevents metal adhesion during casting.
Alumina Silicate and Borax Flux Mixture
Fused mixture of alumina silicate and borax (sodium tetraborate) used as a binder flux in ceramic shell foundry cores. HTS 3824.99.39 covers this inorganic compound blend specifically prepared for high-temperature foundry bonding applications. Enhances thermal shock resistance.
Magnesium Oxide and Sodium Phosphate Hardener
Reactive powder blend of magnesium oxide and sodium phosphate that sets foundry molds through chemical hydration. Classified HTS 3824.99.39 as inorganic mixture for no-bake foundry systems. Provides rapid strength development without heat.