New

Ask Wove anything about tariffs.

Try Tariff Assistant

Strontium Hydroxide Octahydrate

Strontium hydroxide octahydrate (Sr(OH)2·8H2O) is a white crystalline powder used in chemical synthesis and as a pH adjuster. It falls under HTS 2816.40.10.00 as a hydroxide of strontium, specifically classified within Chapter 28 for inorganic bases and oxides, hydroxides, and peroxides of strontium or barium.

Import Duty Rates by Country of Origin

Origin CountryMFN RateCh.99 SurchargesTotal Effective Rate
🇨🇳China4.2%+25.0%29.2%
🇲🇽Mexico4.2%—4.2%
🇨🇦Canada4.2%—4.2%
🇩🇪Germany4.2%—4.2%
🇯🇵Japan4.2%—4.2%

Alternative Classifications

This product could be classified differently depending on its characteristics or intended use.

2827.39Lower: 16.2% vs 29.2%

If containing organic stabilizers or additives

Mixtures of inorganic bases with organic substances may fall under heading 2827 for modified or stabilized compounds.

3105.90.00Lower: 25% vs 29.2%

If formulated for fertilizer use

Strontium compounds prepared as mineral fertilizers are excluded from Chapter 28 per chapter note and classified in Chapter 31.

3824.99Lower: 17.5% vs 29.2%

If imported as a chemical preparation or mixture

Blends or preparations not meeting 'chemically defined' criteria shift to heading 3824 for other chemical products.

Not sure which classification is right?

The Tariff Assistant works through the GRI rules on your specific product to reach the right HTS code — and can price the duty on it in the same conversation.

Import Tips & Compliance

• Verify purity and chemical composition via lab analysis to confirm classification as chemically defined strontium hydroxide per Chapter 28 notes

• Include Safety Data Sheets (SDS) and Certificates of Analysis in documentation to comply with TSCA and DOT hazardous material regulations

• Avoid misclassification as organic compounds; ensure no organic stabilizers exceed incidental levels to prevent reclassification