Guaiacol Carbonate
Guaiacol carbonate is a derivative formed by esterification of guaiacol, used historically as an antitussive agent in respiratory medications. As a chemically defined derivative of guaiacol (ether-phenol), it qualifies under HTS 2909.50.20.00. Imported primarily for pharmaceutical intermediate production.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If classified primarily by ester oxygen function
Chapter notes require esters to follow the parent acid-function compound, potentially placing it later in numerical order.
If when pre-formulated into bulk medicinal preparations
Medicaments containing guaiacol derivatives as active ingredients are classified in Chapter 30, not pure chemicals.
If for alcohol-peroxide derivatives rather than simple carbonates
Peroxide functionality would shift to the subsequent ether-peroxide heading in numerical order.
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Import Tips & Compliance
• Include structural formula and CAS number (10197-20-0) on commercial invoice to confirm derivative status under guaiacol heading
• Verify no halogenation or sulfonation that might shift classification to earlier derivative subheadings per chapter notes
• Obtain prior FDA notification if destined for drug manufacturing to avoid customs holds on pharmaceutical precursors
Related Products under HTS 2909.50.20.00
Guaiacol (Methoxyphenol)
Guaiacol, chemically 2-methoxyphenol (C7H8O2), is a naturally occurring organic compound found in wood smoke and creosote, used primarily as a precursor in pharmaceutical synthesis and as an expectorant in cough syrups. It falls under HTS 2909.50.20.00 as a chemically defined ether-phenol. This product is imported in pure form for industrial chemical applications.
4-Methylguaiacol (Creosol)
4-Methylguaiacol, also known as creosol (4-methyl-2-methoxyphenol), is a guaiacol derivative obtained from guaiacum resin or wood creosote, used in organic synthesis and as a disinfectant. It is specifically listed under HTS 2909.50.20.00 as a guaiacol derivative ether-phenol. Commonly imported for flavor and fragrance applications.
Guaiacol Glycerol Ether
Guaiacol glycerol ether is a specialized derivative where guaiacol is ether-linked to glycerol, used in pharmaceutical formulations for expectorant properties. Classified under HTS 2909.50.20.00 as it maintains the core guaiacol ether-phenol structure. Imported for synthesis of advanced respiratory therapeutics.
Vanillin (4-Hydroxy-3-methoxybenzaldehyde)
Synthetic vanillin, chemically 4-hydroxy-3-methoxybenzaldehyde, is a guaiacol derivative produced via guaiacol oxidation or lignin processes, widely used as vanilla flavoring. Despite aldehyde function, its guaiacol ether-phenol nature places it under HTS 2909.50.20.00 per chapter numerical order rules. Imported in bulk for food and fragrance industries.
Guaiacyl Acetate
Guaiacyl acetate is the acetyl ester derivative of guaiacol, used as an intermediate in organic synthesis and historical antitussive formulations. As an ester of ether-phenol per chapter note 5(A), it follows guaiacol classification under HTS 2909.50.20.00. Imported for fine chemical manufacturing.
Methylguaiacol (2-Methoxy-4-methylphenol)
Methylguaiacol (2-methoxy-4-methylphenol) is a positional isomer derivative of guaiacol used in flavor chemistry and as a synthetic intermediate. It qualifies under HTS 2909.50.20.00 as a chemically defined guaiacol derivative ether-phenol. Bulk imported for aroma compound production.