1,9-Thianthrenedicarboxylic acid
1,9-Thianthrenedicarboxylic acid is a polycyclic aromatic heterocyclic compound with sulfur bridges and carboxylic acid groups. Explicitly named in HTS 2934.99.05.00 under 'other heterocyclic compounds: aromatic.' Used in specialty dyes and advanced material synthesis.
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If classified by polycarboxylic acid function
Chapter note 3(A) may send acid-function compounds to later oxygen-function headings if acid dominates.
If organo-sulfur characteristics prevail
Thianthrene's sulfur-carbon linkages could trigger heading 2930 per chapter note exclusions.
If for other nucleic acid related heterocycles
If structurally analogous to nucleosides, might shift to earlier 2934 subheadings.
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Import Tips & Compliance
• Provide molecular weight and carboxylic acid titration data to confirm identity and acid-function classification
• Ensure proper corrosion-resistant packaging due to carboxylic acid properties during ocean freight
• Declare exact CAS registry number to prevent confusion with thianthrene derivatives in other subheadings
Related Products under HTS 2934.99.05.00
5-Amino-3-phenyl-1,2,4-thiadiazole
5-Amino-3-phenyl-1,2,4-thiadiazole is a specific aromatic heterocyclic compound containing a thiadiazole ring with an amino group and phenyl substituent. It falls under HTS 2934.99.05.00 as one of the explicitly named 'other heterocyclic compounds' that are aromatic or modified aromatic. This chemical is primarily used as an intermediate in pharmaceutical synthesis and agrochemical production.
2-Hydroxybenzoxazole (Benzoxazolone)
2-Hydroxybenzoxazole, also known as benzoxazolone, is an aromatic heterocyclic compound featuring a fused benzene-oxazole ring system. Classified under HTS 2934.99.05.00 as an explicitly named 'other heterocyclic compound' with aromatic character. Used in dye synthesis, polymer additives, and pharmaceutical intermediates.
4-Phenylmorpholine
4-Phenylmorpholine is a six-membered heterocyclic ether containing a nitrogen atom and phenyl substituent, making it aromatic or modified aromatic. It is explicitly listed under HTS 2934.99.05.00 within 'other heterocyclic compounds.' Commonly used as a catalyst in organic synthesis and polymer production.
Thioxanthene-9-one (Thioxanthone)
Thioxanthene-9-one, commonly called thioxanthone, is a tricyclic aromatic heterocyclic ketone with a central sulfur atom. It is specifically enumerated under HTS 2934.99.05.00 as an 'aromatic heterocyclic compound.' Widely used as a photoinitiator in UV-curable inks, coatings, and adhesives.
5-Amino-3-phenyl-1,2,4-thiadiazole Technical Grade Powder
Technical grade 5-Amino-3-phenyl-1,2,4-thiadiazole powder (98%+ purity) is the industrial form of this named heterocyclic compound used in agrochemical synthesis. Classified under HTS 2934.99.05.00 due to explicit naming regardless of minor impurities allowed by chapter note (a). Supplied with stabilizer for safe handling.
Benzoxazolone UV Absorber Grade
Benzoxazolone (2-Hydroxybenzoxazole) UV absorber grade is specifically named under HTS 2934.99.05.00 for its aromatic heterocyclic structure. Used in plastics and coatings for light stabilization. Minor anticaking agent permitted per chapter note (f).