Alumina Crucible for Laboratory Use
High-purity alumina crucible designed for high-temperature melting and analysis in chemical laboratories. It features a hardness of 9 on the Mohs scale due to its sintered aluminum oxide composition, meeting Chapter 69 requirements for fired ceramic products used in technical applications. Exceeds standard porcelain hardness for handling corrosive substances.
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If hardness below 9 on Mohs scale
Lower hardness ceramics for lab/chemical use fall under the prior subheading within the same technical wares category.
If not fully fired after shaping
Unfired or refractory ceramic crucibles are classified in heading 6903, outside Chapter 69's fired products scope.
If repurposed for decorative retail sale
Technical ceramics sold as ornamental articles shift to Chapter 69 household goods, away from lab-specific uses.
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Import Tips & Compliance
• Verify Mohs hardness certification via ASTM testing to confirm classification; ensure lab-use declaration to avoid reclassification as general tableware
• Provide firing process documentation as proof of Chapter 69 eligibility
Related Products under HTS 6909.12.00.00
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