Analysis
HTS 3601.00.00 covers propellant powders under heading 3601 (propellant powders).
The general duty rate is 3.25% of the customs value, which is in the middle of the rates in chapter 36 (66th percentile of 16 lines with an ad valorem rate). On a shipment valued at $10,000 that is $325 in duty before any Chapter 99 additions or preference claims.
The column 2 rate, for countries without normal trade relations, is 60%, 18.5 times the general rate.
Goods that qualify under GSP, the Australia FTA, the Bahrain FTA, the Chile FTA, the Colombia TPA, and 12 others can enter duty-free instead of paying 3.25%. It is also eligible under GSP, the developing-country programme, which Congress has to renew; check whether GSP is in force on the entry date.
It is the only US line under subheading 3601.00, so the six-digit code used by every Harmonized System country and the eight-digit US line describe the same goods; a foreign tariff or an exporter's invoice showing 3601.00 points straight here.
Census statistics map these goods to NAICS 325920 (Explosives Manufacturing), an industry of 80 US establishments employing 7,034 people. That concordance is how imports of this line are compared with US output.