HS Code for BIIR rubber
BIIR rubber, or Bromobutyl rubber, is classified under HS code 4002.39. This classification falls within Chapter 40, which covers rubber and articles thereof. Heading 4002 is dedicated to synthetic rubber and factice derived from oils, in primary forms or in plates, sheets, or strip. Within this heading, subheading 4002.31 and 4002.39 cover halo-isobutene-isoprene rubber, commonly known as halogenated butyl rubber. While 4002.31 is specifically reserved for chlorobutyl rubber (CIIR), 4002.39 is the "other" category that captures bromobutyl rubber (BIIR). BIIR is produced by brominating butyl rubber, which enhances its vulcanization rate and compatibility with other elastomers like natural rubber. The classification is determined by the chemical composition of the synthetic rubber and its physical form. To qualify for this code, the BIIR must be in a primary form, such as bales, blocks, or crumbs, or in unvulcanized plates, sheets, or strips. Once the rubber is vulcanized or manufactured into a finished product, it moves to different headings within Chapter 40.
Products Included
- Bromobutyl rubber (BIIR) in bales
- Halogenated isobutene-isoprene rubber (brominated)
- BIIR rubber sheets (unvulcanized)
- Bromobutyl rubber crumbs or pellets
Common Misclassification
BIIR is frequently confused with CIIR (Chlorobutyl rubber), which is classified under HS code 4002.31. While both are halogenated butyl rubbers, the specific halogen used (Bromine vs. Chlorine) dictates the subheading. Another common error is classifying BIIR under 4002.30 (the general heading for butyl rubber) without specifying the halogenated nature, or under 4002.11/4002.19 if it is mistaken for Styrene-butadiene rubber (SBR). Furthermore, if the BIIR is already vulcanized, it should be classified under 4008 (plates/sheets) or 4016 (other articles), not 4002.
FAQ
What is the HS code for BIIR rubber?
The HS code for BIIR (Bromobutyl) rubber is 4002.39, covering halogenated isobutene-isoprene rubber other than chlorobutyl.
Can BIIR rubber be classified under 4002.31?
No, 4002.31 is specifically for Chlorobutyl rubber (CIIR). Bromobutyl rubber must be classified under the "other" category, 4002.39.
Industry
Frequently Asked Questions
What is the HS code for BIIR rubber?
The HS code for BIIR rubber is 400239 (Rubber; synthetic, halo-isobutene-isoprene rubber (CIIR or BIIR), in primary forms or in plates, sheets or strip).
How do I classify BIIR rubber for customs?
BIIR rubber is classified under HS code 400239 — Rubber; synthetic, halo-isobutene-isoprene rubber (CIIR or BIIR), in primary forms or in plates, sheets or strip. This is a 6-digit subheading level code.
Is the HS code for BIIR rubber the same in all countries?
The base HS code 400239 for BIIR rubber is internationally standardized for the first 6 digits across 200+ countries. Individual countries may add additional digits for national tariff lines and specific classifications.