Borosilicate Glass Chunks
Massive chunks of borosilicate glass, known for thermal resistance, in unworked form straight from the melting furnace. HTS 7001.00.20.00 applies to this 'other glass in the mass' used as raw material for labware and cookware manufacturing.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If derived from broken lab glassware
Recycled borosilicate fragments are cullet/scrap, not virgin mass.
If formed into tubes before export
Even unwrought tubes are 'drawn glass' under heading 7002.
If for laboratory use if sold as finished labware
End-use as lab articles shifts to heading 7017.
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Import Tips & Compliance
• Label with boric oxide content to distinguish from soda-lime; helps CBP verify non-waste status
• Use ISF filings for bulk glass shipments over 100kgs to preempt holds
Related Products under HTS 7001.00.20.00
Soda-Lime Glass Mass Billets
Unworked soda-lime glass in the form of solid billets or lumps, produced by melting raw materials and cooling into massive shapes without further processing. Classified under HTS 7001.00.20.00 as 'glass in the mass, other' since it is unworked glass not drawn, blown, or otherwise formed into specific shapes.
Optical Flint Glass Masses
Dense flint glass in large, unworked masses with high refractive index, melted for precision optics. Classified in HTS 7001.00.20.00 as other glass in the mass, prior to any shaping or polishing.
Float Glass Melt Masses
Molten-cooled masses of float glass composition for sheet production, in unworked lump form. Under HTS 7001.00.20.00 as other glass in the mass before floating or rolling.
Colored Soda Glass Masses
Soda glass in mass with integrated colorants like cobalt for blue tint, unworked. Classified HTS 7001.00.20.00 as other glass in the mass, color from melt not surface.
High-Silica Glass Billets
Glass billets with >60% SiO2 for thermal applications, in unworked mass form. HTS 7001.00.20.00 for other glass in the mass, akin to glass wool base but solid.
Architectural Glass Melt Lumps
Lumps of melt from architectural flat glass production, unworked for remelt. HTS 7001.00.20.00 as glass in the mass, other, pre-sheet forming.