Hydrated silica
Other inorganic acids and other inorganic oxygen compounds of non-metals. > Other inorganic oxygen compounds of non-metals: > Silicon dioxide > Hydrated silica
Duty Rate (from China)
Products classified under Tariff item 2811.22.00.10
Coarse-Pore Synthetic Silica Gel for Water Filtration
Coarse-pore synthetic silica gel used in preliminary water filtration stages. It is a separate chemically defined compound of silicon dioxide, meeting Chapter 28 Note 1 criteria.
2811.22.00Colloidal Silica Dispersion (50% Solids)
Colloidal silica dispersion with 50% solids, used in semiconductor polishing. It is silicon dioxide suspended in water, meeting Chapter 28 Note 1(b) for aqueous solutions.
2811.22.00Food-Grade Synthetic Silica Gel Capsules
Encapsulated synthetic silica gel for moisture control in food packaging. The silica gel core is a separate chemically defined compound, and the encapsulation does not alter its classification.
2811.22.00Fumed Silica (Aerosil)
Fumed silica produced by flame hydrolysis, a form of synthetic silicon dioxide. It is a separate chemically defined compound, meeting Chapter 28 criteria.
2811.22.00High-Purity Silica Powder for LEDs
High-purity silica powder for LED phosphor production, with purity above 99.99%. It is a separate chemically defined compound of silicon dioxide.
2811.22.00High-Purity Synthetic Silica Gel for Chromatography
High-purity synthetic silica gel for chromatography, with controlled pore size. It is a separate chemically defined compound of silicon dioxide, suitable for laboratory use.
2811.22.00Indicator Silica Gel with Cobalt Chloride
Indicator silica gel impregnated with cobalt chloride for moisture detection. The base is synthetic silicon dioxide, and the cobalt chloride acts as a colouring substance for identification, per Chapter 28 Note 1(e).
2811.22.00Micronized Synthetic Silica Gel for Cosmetics
Micronized synthetic silica gel used as a mattifying agent in cosmetics. It is a separate chemically defined compound of silicon dioxide, meeting Chapter 28 criteria.
2811.22.00Nano-Silica Particles (20 nm)
Nano-sized amorphous silicon dioxide particles produced via sol-gel process. They are a separate chemically defined compound, meeting Chapter 28 criteria.
2811.22.00Precipitated Silica Powder
Precipitated silica powder, a form of synthetic amorphous silicon dioxide. It is a separate chemically defined compound, meeting Chapter 28 criteria.
2811.22.00Self-Indicating Silica Gel in Reusable Containers
Self-indicating silica gel in reusable plastic containers for camera lens storage. The silica gel is the essential component, and the container is incidental packaging.
2811.22.00Synthetic Silica Gel Beads for Gas Drying
Synthetic silica gel beads for industrial gas drying. These are separate chemically defined compounds of silicon dioxide, used for dehydration.
2811.22.00Synthetic Silica Gel Desiccant Packets
Synthetic silica gel desiccant packets for moisture absorption in packaging. The silica gel is a separate chemically defined compound, and the packet is packaging.
2811.22.00Synthetic Silica Gel for Pharmaceutical Packaging
Tyvek-wrapped synthetic silica gel units for pharmaceutical packaging. The silica gel core is a separate chemically defined compound, and the Tyvek wrap is protective.
2811.22.00Synthetic Silica Gel Powder for Catalyst Support
Fine powder synthetic silica gel used as an inert catalyst support. It is a separate chemically defined compound of silicon dioxide, before any impregnation with active metals.