Maleic Anhydride with Stabilizer Additive
Maleic anhydride containing <0.05% polymerization inhibitor (hydroquinone) for transport stability, classified HTS 2917.14.5000 per Chapter 29 note (f). Remains chemically defined acyclic anhydride for resin production.
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If stabilizer >1% or renders specific use
Exceeds Chapter 29 note (f) limits for added stabilizers.
If without any stabilizer addition
Pure form without additives uses primary maleic anhydride subheading.
If reacts to form unsaturated polyester resin
Polymerized products become plastics of Chapter 39.
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Import Tips & Compliance
• Document stabilizer concentration (<1%) to qualify under Chapter 29 note (f) exception
• Provide quantitative HPLC analysis showing maleic anhydride as principal component (>98%)
• Separate from polyester prepolymers which classify under Chapter 39
Related Products under HTS 2917.14.50.00
Maleic Anhydride Flakes
Maleic anhydride in flake form, a white crystalline solid derived from oxidation of butene, classified under HTS 2917.14.5000 as an acyclic polycarboxylic acid anhydride. Used primarily as a chemical intermediate for resins and coatings, meeting Chapter 29 note requirements for separate chemically defined organic compounds.
Industrial Maleic Anhydride Briquettes
Compressed maleic anhydride briquettes for bulk industrial handling, an acyclic dicarboxylic acid anhydride under HTS 2917.14.5000. Primarily used in unsaturated polyester resin manufacturing, qualifying as a separate chemically defined compound per Chapter 29.
Purified Maleic Anhydride Pellets
High-purity maleic anhydride pellets (>99.5%) for pharmaceutical intermediate synthesis, classified in HTS 2917.14.5000 as 'other' acyclic polycarboxylic anhydride. Meets Chapter 29 criteria for chemically defined compounds without excluded additives.
Technical Grade Maleic Anhydride Powder
Technical grade maleic anhydride powder (98-99% purity) for agricultural chemical synthesis, under HTS 2917.14.5000 as other maleic anhydride forms. Qualifies as separate organic compound per Chapter 29 note (a), excluding mixtures.
Brittle Maleic Anhydride Lumps
Solid maleic anhydride in brittle lump form from cooled molten material, HTS 2917.14.5000 'other' classification for acyclic polycarboxylic anhydrides. Used in paper sizing chemical manufacture.
Pharma-Grade Maleic Anhydride Crystals
Pharmaceutical grade maleic anhydride crystals with <10 ppm heavy metals, under HTS 2917.14.5000 as pure acyclic anhydride. Intermediate for maleate salt formation in drug synthesis.