DDT (Dichlorodiphenyltrichloroethane) USP Reference Standard from Canada
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.
Duty Rate — Canada → United States
15.5%
Rate breakdown
9903.05.2910%Section 301 (forced labor) — additional 10% ad valorem on products of Canada
Import Tips
• Require DEA Schedule IV exemption letter and EPA analytical use declaration; stock convention restrictions apply
• Ship in child-resistant laboratory packaging with tamper-evident seals per DOT hazardous materials regulations
• Avoid agricultural end-use declarations; specify 'analytical reference standard only' to prevent customs holds