Clofibrate Reference Standard
Analytical reference standard clofibrate used for HPLC calibration in pharmaceutical quality control. Remains classified as pure chemical entity under HTS 2918.99.0500, specifically named aromatic carboxylic ester with oxygen function per Chapter 29 definitions. Not a finished medicament.
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If certified as immunologic reference but actually chemical
Immunological products specifically excluded; pure organics stay Chapter 29.
If when pre-dissolved in acetonitrile for direct HPLC use
Solvent solutions for analysis classified as lab reagents in 3822 per Chapter notes.
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Import Tips & Compliance
• Provide NIST-traceable certificate with assigned purity value; declare as 'Analytical Reference Material'
• Small package sizes (<100g) typical; ensure tamper-evident HPLC vial packaging
• Avoid 'pharmaceutical' declaration to prevent FDA drug import requirements
Related Products under HTS 2918.99.05.00
p-Anisic Acid
p-Anisic acid (4-methoxybenzoic acid) is an aromatic carboxylic acid with an additional oxygen function from the methoxy group attached to the benzene ring. It falls under HTS 2918.99.0500 as a specifically named aromatic carboxylic acid with additional oxygen function, chemically defined and separate as per Chapter 29 note (a). Used in organic synthesis, flavors, and pharmaceuticals.
Clofibrate
Clofibrate is ethyl 2-(4-chlorophenoxy)-2-methylpropanoate, an aromatic carboxylic ester with additional oxygen function in the ether linkage. Specifically named in HTS 2918.99.0500 as a derivative of carboxylic acid with oxygen function, meeting Chapter 29 criteria for esters classified with parent acid functions. Used historically as lipid-lowering pharmaceutical.
3-Phenoxybenzoic Acid
3-Phenoxybenzoic acid features a phenoxy group (-O-C6H5) at the meta position of benzoic acid, providing aromatic carboxylic acid with additional oxygen ether function. Explicitly listed in HTS 2918.99.0500 for such specifically named compounds per Chapter 29 note (a). Serves as intermediate for insecticides like permethrin.
p-Anisic Acid USP Grade
Pharmaceutical USP-grade p-anisic acid meets higher purity standards for drug synthesis and preservation applications. Classified under HTS 2918.99.0500 as the specifically named aromatic carboxylic acid with methoxy oxygen function, compliant with Chapter 29 purity requirements. Used as antimicrobial preservative in formulations.
3-Phenoxybenzoic Acid Technical Grade
Technical grade 3-phenoxybenzoic acid (95-98% purity) for large-scale pesticide intermediate production. HTS 2918.99.0500 applies to this specifically named compound despite lower purity, as impurities don't change chemical identity per Chapter 29 note (a). Key precursor for pyrethroid insecticides.
Ethyl p-Anisate
Ethyl p-anisate is the ethyl ester of p-anisic acid, retaining aromatic carboxylic acid ester with oxygen function classification. Per Chapter 29 note 3(A)(B), esters of Chapter 29 acids with ethyl alcohol classified with parent acid heading 2918.99.0500. Fragrance and intermediate chemical.