α-HBCD Isomer (Alpha-Hexabromocyclododecane)
The alpha stereoisomer of 1,3,5,7,9,11-hexabromocyclododecane is a specific chemically defined organic compound under HTS 2903.89.40.00. As a halogenated derivative of cyclododecane, it qualifies per chapter notes for separate isomers of organic compounds. Used primarily as a research chemical and flame retardant intermediate.
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If containing heterocyclic ring structures from impurities or synthesis variants
Chapter notes to 2933 exclude epoxides but include other heterocyclic compounds; purity below 98% may trigger reclassification.
If for lower brominated cyclododecane derivatives with fewer halogen substituents
Heading structure separates by specific compound naming; fewer bromines change to general 'other' halogenated cyclics.
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Import Tips & Compliance
• Provide HPLC chromatograms showing ≥90% alpha-isomer purity to distinguish from technical mixtures
• Include safety data sheets noting low bioaccumulation factor specific to alpha-HBCD for regulatory review
• Ensure labeling specifies stereochemistry as chapter notes cover isomer mixtures but purity affects end-use declarations
Related Products under HTS 2903.89.40.00
1,3,5,7,9,11-Hexabromocyclododecane (HBCD) Technical Grade
1,3,5,7,9,11-Hexabromocyclododecane (HBCD) is a brominated flame retardant classified as a halogenated derivative of cyclanic hydrocarbons under HTS 2903.89.40.00. This technical grade product consists primarily of stereoisomers used in industrial applications for fire safety. It meets chapter 29 requirements for separate chemically defined organic compounds with bromine directly linked to the cyclic carbon structure.
β-HBCD Isomer (Beta-Hexabromocyclododecane)
Beta-1,3,5,7,9,11-hexabromocyclododecane is the gamma-stable isomer classified specifically under HTS 2903.89.40.00 as a halogenated cyclanic hydrocarbon derivative. This chemically pure form meets chapter 29 note (b) for separate isomers. Primarily used in analytical standards and specialized flame retardant formulations.
γ-HBCD Isomer (Gamma-Hexabromocyclododecane)
The gamma stereoisomer of hexabromocyclododecane, the most stable form, falls under HTS 2903.89.40.00 as a defined halogenated cyclic hydrocarbon. Chapter 29 classification applies due to its chemical purity and direct carbon-bromine linkages in the cyclododecane ring. Used in polymer flame retardant masterbatches.
HBCD Reference Standard 98% Purity
High-purity 1,3,5,7,9,11-hexabromocyclododecane reference standard (98%+) is classified under HTS 2903.89.40.00 as a separate chemically defined compound. Meets chapter requirements for organic halogenated cyclics without excluded preparations. Used for EPA method 8275A calibration and research.