Fused Quartz Glass Slab
Rectangular slab of fused quartz glass in bulk mass form, ideal for slicing into substrates or windows in photonics applications. It qualifies for HTS 7001.00.10.00 as unworked glass in the mass of fused silica, where cutting to shape does not affect classification per chapter notes.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If floated and polished into sheet form
Polished float glass sheets, even of fused quartz, fall under 7005 for worked sheet glass.
If laboratory apparatus like watch glasses are formed
Shaped into labware, it becomes laboratory glassware under 7017.
If for tempered safety tempered versions
Tempered or toughened fused quartz sheets classify under 7007.
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Import Tips & Compliance
• ,Test for IR absorbing layers; coated slabs may shift to 7005 or 7007 if reflecting/non-reflecting
• Package securely to prevent cracking; declare exact dimensions to calculate duties accurately
Related Products under HTS 7001.00.10.00
Fused Quartz Glass Ingot
A large, solid mass of high-purity fused quartz glass produced by melting silica at high temperatures, used as raw material for further processing into rods, tubes, or optical components. It falls under HTS 7001.00.10.00 as 'glass in the mass' of fused quartz or other fused silica, prior to any shaping or forming beyond the initial melt.
Synthetic Fused Silica Boule
A cylindrical boule of synthetic fused silica created via flame hydrolysis or electric fusion, serving as stock material for semiconductor and UV optic manufacturing. Classified in HTS 7001.00.10.00 because it is glass in the mass of fused silica, unworked except for annealing.
High-Purity Fused Silica Lump
Irregular lumps of high-purity fused silica obtained directly from the melting furnace, used in refractory linings or remelting. HTS 7001.00.10.00 applies as glass in the mass specifically of fused quartz/silica, excluding waste or cullet.
Fused Silica Glass Block
Solid block of fused silica glass cast in rectangular form for machining into precision components like telescope mirrors. Classified under HTS 7001.00.10.00 for glass in the mass of fused quartz, retaining mass character post-annealing.
Electric-Fused Quartz Mass
Bulk mass of quartz glass produced by electric arc fusion, known for low bubble content in high-end applications. It is 'glass in the mass of fused quartz' under HTS 7001.00.10.00, as processes before annealing do not constitute working.
UV-Grade Fused Silica Chunk
Chunks of premium fused silica optimized for ultraviolet transmission, supplied in bulk for optical fabrication. HTS 7001.00.10.00 covers this as unworked glass in the mass of fused silica.