Electronic-Grade Styrene Monomer
Ultra-high purity electronic-grade styrene monomer, with less than 1 ppm metals and less than 5 ppb particles, is a separate chemically defined organic compound used in photoresist manufacturing for semiconductor production. It falls under tariff item 2902.50.00 as styrene, a cyclic hydrocarbon, and the purity does not alter its classification.
Import Duty Rates by Country of Origin
| Origin Country | MFN Tariff | Surtaxes | Total Effective Rate |
|---|---|---|---|
| 🇨🇳China | Free | — | Free |
| 🇲🇽Mexico | Free | — | Free |
| 🇺🇸United States | Free | — | Free |
| 🇩🇪Germany | Free | — | Free |
| 🇯🇵Japan | Free | — | Free |
Not sure which classification is right?
The Tariff Assistant works through the GRI rules on your specific product to reach the right tariff item — and can price the duty on it in the same conversation.
Import Tips & Compliance
• Ensure the product is declared as styrene (CAS 100-42-5) and provide a certificate of analysis to confirm purity for customs verification
• Check if the product requires an import permit under the Chemicals Management Plan (CMP) with Environment and Climate Change Canada
• Keep shipping documents showing the product is not for retail sale to avoid reclassification
Related Products under Tariff item 2902.50.00
Inhibited Styrene Monomer
Inhibited styrene monomer containing 10-15 ppm tert-butylcatechol (TBC) as a stabilizer is a separate chemically defined organic compound. The stabilizer is added for preservation or transport, which is permitted under Chapter 29 note 1(f), so it remains classified as styrene under tariff item 2902.50.00.
Polymer-Grade Styrene
Polymer-grade styrene with purity above 99.7% and low impurities is a separate chemically defined organic compound used for polystyrene and ABS resin production. It is classified under tariff item 2902.50.00 as styrene, a cyclic hydrocarbon, regardless of its intended use in polymerization.
Styrene for SBR Rubber Production
Styrene monomer refined for styrene-butadiene rubber (SBR) production is a separate chemically defined organic compound, specifically controlled for impurities affecting rubber curing. It falls under tariff item 2902.50.00 as styrene, a cyclic hydrocarbon, and the end-use does not change its classification.
Styrene Monomer
Styrene monomer (C6H5CH=CH2) is a clear, colorless liquid cyclic hydrocarbon used as a building block for polystyrene and synthetic rubbers. As a separate chemically defined organic compound, it is classified under tariff item 2902.50.00, which covers styrene specifically.
Styrene with Anti-Dusting Agent
Styrene containing a trace odoriferous substance, such as methyl acrylate, added solely for safety identification is a separate chemically defined organic compound. Under Chapter 29 note 1(g), such additions for identification or safety do not change classification, so it remains under tariff item 2902.50.00 as styrene.