DDT (Dichlorodiphenyltrichloroethane) USP Reference Standard
DDT (clofenotane, INN) is the specific organochlorine compound (1,1,1-trichloro-2,2-bis(p-chlorophenyl)ethane) used as analytical reference standard for residue testing. Classified under HTS 2903.92.00.00 as the explicitly named halogenated aromatic hydrocarbon derivative. Meets Chapter 29 criteria for separate chemically defined organic compounds.
Import Duty Rates by Country of Origin
| Origin Country | MFN Rate | Ch.99 Surcharges | Total Effective Rate |
|---|---|---|---|
| šØš³China | 5.5% | +25.0% | 30.5% |
| š²š½Mexico | 5.5% | ā | 5.5% |
| šØš¦Canada | 5.5% | ā | 5.5% |
| š©šŖGermany | 5.5% | ā | 5.5% |
| šÆšµJapan | 5.5% | ā | 5.5% |
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If diagnostic reagents containing DDT as active diagnostic agent
Reagents for chemical analysis classified by function in 3822 regardless of Chapter 29 chemical composition.
If other halogenated aromatic derivatives used as lab standards
Only specifically named HCB/DDT use 2903.92; other halogenated aromatics classifiable in 2903.99 residuals.
If complexed with quaternary ammonium for analytical stabilization
Heterocyclic or organo-metallic derivatives shift to Chapter 29 subchapters III/IV per classification notes.
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Import Tips & Compliance
ā¢ Require DEA Schedule IV exemption letter and EPA analytical use declaration; stock convention restrictions apply
ā¢ Ship in child-resistant laboratory packaging with tamper-evident seals per DOT hazardous materials regulations
ā¢ Avoid agricultural end-use declarations; specify 'analytical reference standard only' to prevent customs holds
Related Products under HTS 2903.92.00.00
Hexachlorobenzene (HCB) Technical Grade
Hexachlorobenzene (ISO) is a chlorinated aromatic hydrocarbon used primarily as an intermediate in organic synthesis and historically as a fungicide. It falls under HTS 2903.92.00.00 as a specifically named halogenated derivative of aromatic hydrocarbons per Chapter 29 note (a). This pure chemical compound contains no impurities that would exclude it from this classification.
Hexachlorobenzene 99% ACS Reagent Grade
High-purity hexachlorobenzene meeting American Chemical Society standards for laboratory use in organic synthesis and calibration. Specifically enumerated under HTS 2903.92.00.00 as halogenated derivative of benzene. Qualifies under Chapter 29 note (a) for chemically defined organic compounds.
p,p'-DDT Isomeric Standard 98% Purity
Pure p,p'-DDT isomer (1,1,1-trichloro-2,2-bis(4-chlorophenyl)ethane) for environmental monitoring and GC-MS calibration. Falls under HTS 2903.92.00.00 as the specifically named DDT compound. Chemically defined per Chapter 29 note (a) with defined impurities.
Technical DDT 75% Wettable Powder Reference
Standardized technical DDT containing specified HCB impurities for historical pesticide residue studies. Classified under HTS 2903.92.00.00 as specifically named DDT despite formulation. Chapter 29 note (f) allows stabilizers necessary for preservation.
Hexachlorobenzene EPA Method 608 Calibration Standard
Certified reference material of HCB in methanol for wastewater analysis per EPA Method 608. Remains under HTS 2903.92.00.00 as chemically defined compound per Chapter note (e) transport exception. Specifically named halogenated aromatic derivative.