Analysis
HTS 3501.10.50 covers casein: other under heading 3501 (casein, caseinates and other casein derivatives; casein glues).
Rates on the nearby lines range from 6% to 6%. The costliest confusion would be with 3501.90.20 (other: casein glues) at 6%, a difference of 6 points on the customs value.
There is no general-rate duty on this line, which puts it with roughly 50% of the 14 tariff lines in chapter 35 that are also free. Free here means free of the base duty only: origin-specific Chapter 99 duties such as Section 301 can still be owed.
The other lines in the same group are 3501.10.10 (milk protein concentrate, 0.37¢/kg), 3501.90.20 (other: casein glues, 6%) and 3501.90.60 (other: other, 0.37¢/kg).
Census statistics map these goods to NAICS 311514 (Dry, Condensed, and Evaporated Dairy Product Manufacturing), an industry of 174 US establishments employing 17,210 people, the industry a domestic producer of these goods reports under.
The general rate of Free has not changed in any edition of the schedule since Jan 2023.
Neighbouring lines
| Line | Description | General rate |
|---|---|---|
| 3501.10.10 | Milk protein concentrate | 0.37¢/kg |
| 3501.90.20 | Other: casein glues | 6% |
| 3501.90.60 | Other: other | 0.37¢/kg |