About HS Code 390390
This 'not elsewhere specified' category for styrene polymers in primary forms covers a diverse range of specialized styrene-based polymers that don't fit into the more specific categories like expansible PS, general PS, SAN, or ABS. These often include block copolymers, graft copolymers, or blends designed for unique performance characteristics, such as thermoplastic elastomers. Exporters are typically specialized chemical companies, and importers are manufacturers requiring advanced materials for niche applications in sectors such as adhesives, sealants, footwear, asphalt modification, and specialized films. Key aspects involve the high-value nature of these materials, the complexity of their chemical structures, and the need for precise formulation to meet specific performance criteria for demanding end-uses.
Products Under This Code
Styrene-butadiene-styrene (SBS) block copolymers, styrene-isoprene-styrene (SIS) block copolymers, styrene-ethylene/butylene-styrene (SEBS) block copolymers, styrene-maleic anhydride (SMA) copolymers, styrene-butadiene rubber (SBR) in primary forms, styrene-acrylic copolymers, styrene-butadiene latex (SBL) in primary forms
Real World Examples
Kraton Polymers (SBS, SIS, SEBS), Sartomer (Styrene-Acrylic), Polyscope (SMA), Asahi Kasei (SBR), Dynasol (SBS)
Common Misclassification
Can be confused with 390319 (other polystyrene) if the complex copolymer structure is overlooked, or with 4002 (synthetic rubber) if the primary form of SBR is mistaken for a finished rubber product.
Products Classified Under 3903.90
Industry
This code belongs to the Plastics & Rubber industry.
Trade Overview
USA, Germany, and Japan are significant exporters, while China, USA, and European countries are major importers for these specialized styrene polymers.
Frequently Asked Questions
What is HS code 390390?
HS code 390390 covers: Styrene polymers; in primary forms, n.e.c. in heading no. 3903. This 'not elsewhere specified' category for styrene polymers in primary forms covers a diverse range of specialized styrene-based polymers that don't fit into the more specific categories like expansible PS, general PS, SAN, or ABS. These often include block copolymers, graft copolymers, or blends designed for unique performance characteristics, such as thermoplastic elastomers. Exporters are typically specialized chemical companies, and importers are manufacturers requiring advanced materials for niche applications in sectors such as adhesives, sealants, footwear, asphalt modification, and specialized films. Key aspects involve the high-value nature of these materials, the complexity of their chemical structures, and the need for precise formulation to meet specific performance criteria for demanding end-uses.
What products fall under HS code 390390?
Styrene-butadiene-styrene (SBS) block copolymers, styrene-isoprene-styrene (SIS) block copolymers, styrene-ethylene/butylene-styrene (SEBS) block copolymers, styrene-maleic anhydride (SMA) copolymers, styrene-butadiene rubber (SBR) in primary forms, styrene-acrylic copolymers, styrene-butadiene latex (SBL) in primary forms
What are common misclassifications for HS code 390390?
Can be confused with 390319 (other polystyrene) if the complex copolymer structure is overlooked, or with 4002 (synthetic rubber) if the primary form of SBR is mistaken for a finished rubber product.
How is HS code 390390 structured?
HS code 390390 is a 6-digit subheading under the Harmonized System. The first 2 digits (39) identify the chapter, digits 3-4 (03) identify the heading, and digits 5-6 (90) specify the subheading. This code is standardized globally by the World Customs Organization.