Hexachlorobenzene (ISO) and DDT (ISO) (clofenotane (INN), 1,1,1-trichloro-2,2-bis(p-chlorophenyl)ethane)
Carboxylic acids with additional oxygen function and their anhydrides, halides, peroxides and peroxyacids; their halogenated, sulphonated, nitrated or nitrosated derivatives. > Halogenated derivatives of aromatic hydrocarbons: > Hexachlorobenzene (ISO) and DDT (ISO) (clofenotane (INN), 1,1,1-trichloro-2,2-bis(p-chlorophenyl)ethane) > Hexachlorobenzene (ISO) and DDT (ISO) (clofenotane (INN), 1,1,1-trichloro-2,2-bis(p-chlorophenyl)ethane)
Duty Rate (from China)
Products classified under Tariff item 2903.92
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.
2903.92.00Hexachlorobenzene 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.
2903.92.00Hexachlorobenzene 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.
2903.92.00Hexachlorobenzene (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.
2903.92.00p,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.
2903.92.00Technical 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.