DDT (Dichlorodiphenyltrichloroethane) USP Reference Standard
DDT (Dichlorodiphenyltrichloroethane) USP Reference Standard is a highly purified form of DDT (clofenotane, INN), specifically 1,1,1-trichloro-2,2-bis(p-chlorophenyl)ethane. It is used as an analytical reference standard for residue testing in laboratories. This product is a separate chemically defined organic compound, meeting the criteria of Chapter 29 Note 1(a), and is explicitly named under tariff item 2903.92.00.
Import Duty Rates by Country of Origin
| Origin Country | MFN Tariff | Surtaxes | Total Effective Rate |
|---|---|---|---|
| 🇨🇳China | Free | — | Free |
| 🇲🇽Mexico | Free | — | Free |
| 🇺🇸United States | Free | — | Free |
| 🇩🇪Germany | Free | — | Free |
| 🇯🇵Japan | Free | — | Free |
More Specific Codes
This product may fall under a more specific subheading:
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If the DDT is presented as a certified reference material in a solution or matrix for laboratory use
Certified reference materials are often classified under heading 38.22 as diagnostic or laboratory reagents, despite being named in Chapter 29.
Not sure which classification is right?
The Tariff Assistant works through the GRI rules on your specific product to reach the right tariff item — and can price the duty on it in the same conversation.
Import Tips & Compliance
• Ensure the product is labeled as a laboratory reference standard and not for pesticide use, as DDT is restricted under Canadian environmental regulations
• Include a certificate of analysis to confirm purity and chemical identity for CBSA classification
• Verify if a permit is required under the Canadian Environmental Protection Act for importation
Related Products under Tariff item 2903.92.00
Hexachlorobenzene 99% ACS Reagent Grade
Hexachlorobenzene 99% ACS Reagent Grade is a high-purity chemical compound used in organic synthesis and laboratory calibration. It is a separate chemically defined organic compound, specifically hexachlorobenzene (ISO), and is explicitly named under tariff item 2903.92.00. The product meets Chapter 29 Note 1(a) as a pure compound, regardless of its ACS grade designation.
Hexachlorobenzene EPA Method 608 Calibration Standard
Hexachlorobenzene EPA Method 608 Calibration Standard is a certified reference material of hexachlorobenzene dissolved in methanol, used for wastewater analysis. The solution is a normal and necessary method of putting up the product for transport and safety, as allowed under Chapter 29 Note 1(e). The hexachlorobenzene itself is explicitly named under tariff item 2903.92.00, and the methanol solvent does not render it suitable for a specific use beyond general analytical purposes.
Hexachlorobenzene (HCB) Technical Grade
Hexachlorobenzene (HCB) Technical Grade is a chlorinated aromatic hydrocarbon used as an intermediate in organic synthesis and historically as a fungicide. It is a separate chemically defined organic compound, explicitly named under tariff item 2903.92.00. The technical grade may contain impurities, which are permitted under Chapter 29 Note 1(a) as long as the product remains a chemically defined compound.
p,p'-DDT Isomeric Standard 98% Purity
p,p'-DDT Isomeric Standard 98% Purity is the pure p,p'-DDT isomer (1,1,1-trichloro-2,2-bis(4-chlorophenyl)ethane) used for environmental monitoring and GC-MS calibration. It is a separate chemically defined organic compound, explicitly named under tariff item 2903.92.00. The product is a single isomer, which is covered by Chapter 29 Note 1(a) as a chemically defined compound.
Technical DDT 75% Wettable Powder Reference
Technical DDT 75% Wettable Powder Reference is a standardized formulation of DDT containing specified impurities, used for historical pesticide residue studies. The product is a mixture of DDT with other substances, but it is presented as a reference material for research. While DDT is explicitly named under tariff item 2903.92.00, the formulation may not meet the purity requirements of Chapter 29 Note 1(a) unless the impurities are incidental to the DDT compound itself.