About HS Code 400231
This HS code covers isobutene-isoprene (butyl) rubber (IIR) in primary forms, including bales, sheets, or strips. Butyl rubber is a specialized synthetic polymer highly valued for its exceptional impermeability to gases and excellent damping properties, making it crucial for applications requiring air retention or vibration isolation. It is primarily traded between a limited number of chemical producers and manufacturers of inner tubes, pharmaceutical stoppers, sealants, and protective linings. Its unique barrier properties ensure consistent demand in niche industrial and medical sectors. Key aspects of this trade include stringent quality requirements for medical applications and the specialized manufacturing processes involved in its production.
Products Under This Code
Butyl rubber bales, IIR sheets, Butyl rubber compounds, IIR pellets, Butyl sealant base, Butyl inner tube material
Real World Examples
ExxonMobil Butyl, Lanxess Butyl, Arlanxeo Butyl, Bicycle inner tubes, Pharmaceutical vial stoppers
Common Misclassification
Can be confused with halo-butyl rubber (400239) if the halogenation isn't specified, or other general synthetic rubbers (e.g., 400299) if its specific chemical structure isn't recognized.
Products Classified Under 4002.31
Industry
This code belongs to the Automotive & Vehicles industry.
Trade Overview
USA, Germany, and Japan are key players in both production and consumption, driven by specialized manufacturing.
Frequently Asked Questions
What is HS code 400231?
HS code 400231 covers: Rubber; synthetic, isobutene-isoprene (butyl) rubber (IIR), in primary forms or in plates, sheets or strip. This HS code covers isobutene-isoprene (butyl) rubber (IIR) in primary forms, including bales, sheets, or strips. Butyl rubber is a specialized synthetic polymer highly valued for its exceptional impermeability to gases and excellent damping properties, making it crucial for applications requiring air retention or vibration isolation. It is primarily traded between a limited number of chemical producers and manufacturers of inner tubes, pharmaceutical stoppers, sealants, and protective linings. Its unique barrier properties ensure consistent demand in niche industrial and medical sectors. Key aspects of this trade include stringent quality requirements for medical applications and the specialized manufacturing processes involved in its production.
What products fall under HS code 400231?
Butyl rubber bales, IIR sheets, Butyl rubber compounds, IIR pellets, Butyl sealant base, Butyl inner tube material
What are common misclassifications for HS code 400231?
Can be confused with halo-butyl rubber (400239) if the halogenation isn't specified, or other general synthetic rubbers (e.g., 400299) if its specific chemical structure isn't recognized.
How is HS code 400231 structured?
HS code 400231 is a 6-digit subheading under the Harmonized System. The first 2 digits (40) identify the chapter, digits 3-4 (02) identify the heading, and digits 5-6 (31) specify the subheading. This code is standardized globally by the World Customs Organization.