2520Gypsum; anhydrite; plasters (consisting of calcined gypsum or calcium sulphate) whether or not coloured, with or without small quantities of accelerators or retarders.

Classify a whole shipment, not one line at a time.

Adhoc's agent assigns HS codes with the ruling chain cited, checks AIRS and PGA requirements, and drafts the CBSA declaration for your broker to review.