p,p'-DDT Isomeric Standard 98% Purity from China
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.
Duty Rate — China → Canada
0%
Import Tips
• Confirm the isomer purity on the certificate of analysis, as CBSA may require proof that it is a single isomer for classification
• DDT is a restricted substance under Canadian law; ensure the product is for laboratory use only and obtain any necessary permits
• Label the product clearly as an analytical standard to avoid confusion with pesticide formulations