Glass Cullet, Waste & Scrap; Glass in the Mass

CRT glass and other activated glass are excluded from heading 7001 because they contain heavy metals (notably lead) and are governed by separate environmental and waste-management considerations. Such glass is classified under heading 8549, which covers electrical and electronic waste. Importers of mixed glass scrap streams should segregate CRT glass and declare it under the correct heading to avoid misclassification and potential EPA-related compliance issues.

Fused quartz and fused silica are ultra-high-purity amorphous silica materials with exceptional thermal stability, UV transparency, and low thermal expansion — properties that make them indispensable in semiconductor fabrication, optical fiber preforms, and laboratory equipment. Their dedicated tariff line (7001001000) reflects both their distinct specification requirements and their higher unit value compared to commodity glass in the mass (7001002000).