Impsonite Asphaltite from Mexico
Impsonite is an intermediate-hardness natural asphaltite used in carbon electrodes, under HTS 2714.90.00.00. Mined from outcrops, it bridges gilsonite and glance pitch in properties.
Duty Rate — Mexico → United States
0%
Rate breakdown
9903.05.860%Universal product exemption (U.S. note 52(b))
Import Tips
• Hardness index (Bauer scale) documentation differentiates subtypes
• Powdered forms need anti-caking agents noted but not exceeding natural state