Styrene Sulfonic Acid Sodium Salt
Styrene sulfonic acid sodium salt, also known as sodium styrenesulfonate (CAS 1230-52-2), is a monomer containing a sulfo group on a phenylethylene backbone. It is used in polymer synthesis for ion exchange resins. This chemically defined compound is classified under tariff item 2908.99.00 as a sulfonated derivative of phenols.
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 |
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Import Tips & Compliance
• Confirm the product is a pure monomer, not a polymer
• Declare the CAS number and polymerization inhibitor content if any
• Ensure the product is not put up in forms for retail sale that would change classification
Related Products under Tariff item 2908.99.00
1,8-Dihydroxynaphthalene-3,6-disulfonic acid (H Acid)
1,8-Dihydroxynaphthalene-3,6-disulfonic acid, known as H Acid, is a key intermediate for azo dye synthesis. It is a separate chemically defined organic compound with two hydroxy groups and two sulfo groups. It falls under tariff item 2908.99.00 as a sulphonated derivative of phenols or phenol-alcohols.
1-Naphthol-3,6-disulfonic acid
1-Naphthol-3,6-disulfonic acid, also known as H-acid, is a sulfonated derivative of naphthol with two sulfo groups. It is a separate chemically defined organic compound used as an intermediate in dye chemistry. It falls under tariff item 2908.99.00 as a sulphonated derivative of phenols or phenol-alcohols.
1-Naphthol-4-sulfonic acid
1-Naphthol-4-sulfonic acid is a sulfonated derivative of 1-naphthol with a sulfo group at the 4-position. It is a separate chemically defined organic compound used as a dye intermediate. It falls under tariff item 2908.99.00 as a sulphonated derivative of phenols or phenol-alcohols.
1-Naphthol-4-sulfonic acid monohydrate
1-Naphthol-4-sulfonic acid monohydrate is the hydrated form of 1-naphthol-4-sulfonic acid, stable for transport in dye production. It is a separate chemically defined organic compound with water of hydration. It qualifies under tariff item 2908.99.00 as a sulphonated derivative of phenols or phenol-alcohols, as the water does not alter its chemical classification.
2,5-Dihydroxybenzenesulfonic acid potassium salt
2,5-Dihydroxybenzenesulfonic acid potassium salt is a sulfonated derivative of dihydroxybenzene in its potassium salt form. It is a separate chemically defined organic compound with only sulfo groups attached to the phenolic structure. It qualifies under tariff item 2908.99.00 as a sulphonated derivative of phenols or phenol-alcohols.
2-Naphthol-3,6-disulfonic acid disodium salt
2-Naphthol-3,6-disulfonic acid disodium salt, also known as R-acid salt, is a sulfonated naphthol derivative with two sulfo groups in its disodium salt form. It is a separate chemically defined organic compound used in dye synthesis. It falls under tariff item 2908.99.00 as a sulphonated derivative of phenols or phenol-alcohols.