Industrial Grade Naphthalic Anhydride Flakes
Naphthalic anhydride in flake form for bulk industrial use in pigment manufacturing and polymer modification. Classified under HTS 2917.39.0800 as the pure aromatic anhydride without disqualifying impurities or additions. The flaked physical form facilitates handling but does not affect chemical classification under Chapter 29.
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If actually phthalic anhydride instead of naphthalic
Phthalic anhydride from benzene has different molecular structure, classified earlier in 2917.37 despite similar appearance and uses.
If imported as the corresponding diacid rather than anhydride
Naphthalene-1,8-dicarboxylic acid (the hydrated form) falls under cyclic alcohols/phenols heading before anhydrides.
If contains ≥30% w/w untreated zinc
Ethylenebistetradecanamide/zinc complexes with naphthalic anhydride derivatives used as lubricants classify in Chapter 38.
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Import Tips & Compliance
• Include melting point (126-128°C) and purity specs in commercial invoice to confirm identity as naphthalic anhydride
• Declare correct UN number 2531 for transport; avoid overpackaging that could suggest retail packing exclusion
• Conduct CBP lab testing if purity questioned; common pitfall is misdeclaration as phthalic anhydride (2917.35)
Related Products under HTS 2917.39.08.00
Naphthalic Anhydride 98% Pure
Naphthalic anhydride is a white to pale yellow crystalline powder used primarily as an intermediate in the synthesis of dyes, pigments, and fluorescent brighteners. This specific grade at 98% purity falls under HTS 2917.39.0800 as it is the pure aromatic polycarboxylic anhydride derived from naphthalene-1,8-dicarboxylic acid. It meets Chapter 29 requirements for separate chemically defined organic compounds without disqualifying additions.
High Purity Naphthalic Anhydride for Dye Synthesis
Ultra-high purity naphthalic anhydride (>99%) specifically packaged for use in perylene dye manufacturing. Falls squarely under HTS 2917.39.0800 as a separate chemically defined aromatic polycarboxylic anhydride per Chapter 29 note (a). No added substances render it suitable for specific use beyond its chemical identity.
Naphthalic Anhydride Technical Grade Powder
Technical grade naphthalic anhydride powder (95-98% purity) with minimal impurities for general chemical synthesis. Classified in HTS 2917.39.0800 as it remains a separate chemically defined compound under Chapter 29, not a mixture requiring Chapter 38 classification. Standard anti-caking agent permitted per note (f).
Reagent Grade Naphthalic Anhydride ACS
ACS reagent grade naphthalic anhydride meeting American Chemical Society specifications for laboratory use. HTS 2917.39.0800 applies as pure aromatic polycarboxylic anhydride, even for lab quantities, since Chapter 29 covers all purity levels of chemically defined compounds. Lab packaging does not trigger retail exclusions.