Hydrolysis Stabilizer P 210 Granules from Mexico
Hydrolysis Stabilizer P 210 granules are classified in HTS 3911.90.15.00 as the named poly(nitrilomethanetetraarylnitrilo...) homopolymer with polyethylene in primary granular form. This thermoplastic additive prevents moisture degradation in engineering plastics like nylon 6,6 and PBT for electrical connectors. Aromatic modification exceeds 95% by weight, dictating specific subheading per Chapter notes.
Duty Rate — Mexico → United States
10%
Rate breakdown
9903.05.5510%Except for products described in headings 9903.05.85–9903.05.92 and 9903.05.94, articles the product of Mexico, as provided for in U.S. note 52 to this subchapter
Import Tips
• Submit technical data sheets confirming exact polymer match to HTS description language to prevent down-classification to 3911.90.19
• Declare as 'primary forms only' with no further processing to avoid 3921 other articles
• Common pitfall: incorrect fiber content disclosure leading to 5402/5403 textile tariff treatment