Polymer-Grade Styrene
High-purity polymer-grade styrene (>99.7% purity, low aldehydes/ peroxides) specifically manufactured for polystyrene (PS) and ABS resin production. Meets HTS 2902.50.00.00 as chemically defined styrene cyclic hydrocarbon. Supplied in bulk for injection molding and extrusion applications.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If partially pre-polymerized (>1% polystyrene)
Any polymerization converts it from monomer (Chapter 29) to polymers of styrene (Chapter 39) based on molecular weight.
If shipped as ethylbenzene/styrene cracker bottoms
Petroleum distillates from ethylbenzene dehydrogenation with mixed hydrocarbons classify in Chapter 27.
Not sure which classification is right?
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Import Tips & Compliance
• Submit polymerization inhibitor certificates and peroxide value test results (<50 ppm) to Customs for verification
• Use stainless steel tankers only; carbon steel contamination causes classification disputes and polymerization risks
• Pre-clear with FDA if eventual polystyrene contacts food, even though styrene itself is bulk chemical
Related Products under HTS 2902.50.00.00
Styrene Monomer
Styrene monomer (C6H5CH=CH2) is a clear, colorless liquid cyclic hydrocarbon used primarily as a building block for polystyrene plastics and synthetic rubbers. It falls under HTS 2902.50.00.00 as a separate chemically defined cyclic hydrocarbon, specifically styrene. This unsaturated aromatic compound polymerizes readily when initiated.
Inhibited Styrene Monomer
Inhibited styrene monomer contains 10-15 ppm tert-butylcatechol (TBC) as a polymerization stabilizer, maintaining stability during storage and transport. Classified under HTS 2902.50.00.00 per Chapter 29 note 2(f) allowing stabilizers necessary for preservation. Used in resin manufacturing and as copolymer feedstock.
Styrene for SBR Rubber Production
Styrene monomer refined for styrene-butadiene rubber (SBR) copolymerization, with strict control of impurities affecting rubber curing. HTS 2902.50.00.00 classification as pure cyclic hydrocarbon. Bulk liquid transported to tire manufacturing facilities.
Electronic-Grade Styrene Monomer
Ultra-high purity electronic-grade styrene (<1 ppm metals, <5 ppb particles) used in photoresist manufacturing for semiconductor production. Still classifies under HTS 2902.50.00.00 as chemically defined styrene despite end-use purity specs. Supplied in cleanroom-compatible containers.
Styrene with Anti-Dusting Agent
Styrene containing trace odoriferous substance (e.g., methyl acrylate) added solely for safety identification per Chapter 29 note 2(g). Remains classified HTS 2902.50.00.00 as the addition doesn't render it suitable for specific use. Used in standard polymer applications.