HS Code 281511
Solid
Official description: Sodium hydroxide (caustic soda); potassium hydroxide (caustic potash); peroxides of sodium or potassium : Sodium hydroxide (caustic soda) : Solid
Also searched as: caustic soda, sodium hydroxide, lye, NaOH, solid caustic soda
Classification
How 281511 breaks down
Inorganic chemicals; compounds of precious metals and isotopes
Sodium hydroxide (caustic soda); potassium hydroxide (caustic potash); peroxides of sodium or potassium
Solid
Covered products
What products fall under HS code 281511?
Buyers sourcing solid from 1688 commonly describe it in these ways. If your product matches, 281511 is likely the right 6-digit starting point — confirm material and intended use against the official tariff.
Import duty by market
Where to check the import duty for HS 281511
The 6-digit code is universal, but duty, VAT and GST are set by the destination country and depend on the full national tariff line with China as the country of origin. Start from the official source for your market.
United States
USITC / CBP · Harmonized Tariff Schedule (HTS)
European Union
TARIC · Access2Markets
United Kingdom
HMRC · UK Integrated Online Tariff
Canada
CBSA · Canadian Customs Tariff
Australia
ABF · Australian customs tariff
Singapore
Singapore Customs · Singapore Trade Classification (HS)
Compare the real China-origin import tax across markets
Use the HS & import duty checker to estimate duty + VAT/GST for 281511 by destination before you pay a 1688 supplier.
Heading 2815
Other HS codes under 2815
Subheadings in the same 4-digit heading — "Sodium hydroxide (caustic soda); potassium hydroxide (caustic potash); peroxides of sodium or potassium". If 281511 is not an exact match, one of these may classify your product more precisely.
Questions
HS code 281511: common questions
What is HS code 281511?
HS code 281511 is the World Customs Organization 6-digit HS 2022 subheading for "Sodium hydroxide (caustic soda); potassium hydroxide (caustic potash); peroxides of sodium or potassium : Sodium hydroxide (caustic soda) : Solid". The first two digits (28) are the chapter — Inorganic chemicals; compounds of precious metals and isotopes — and digits 3-4 (2815) are the heading. Countries add further digits (8-10) for their national tariff line.
What products fall under HS 281511?
Common products classified under 281511 include caustic soda, sodium hydroxide, lye, NaOH, solid caustic soda and similar items matching solid. The correct code still depends on the product's material, function and intended use.
How do I find the import duty for HS code 281511?
Duty is set by the destination country, not by the 6-digit HS code alone. Start from the official tariff of your market — USITC HTS (US), TARIC / Access2Markets (EU), GOV.UK Trade Tariff (UK), CBSA (Canada), ABF (Australia) or Singapore Customs — and look up the full national code with China as the country of origin.
Is HS code 281511 the same in every country?
The first 6 digits (281511) are the same worldwide under the WCO Harmonized System. Beyond that, each country extends the code (HTS in the US, TARIC in the EU, etc.) and sets its own duty and tax rates.
Can I trust the HS code a 1688 supplier gives me?
Treat a supplier-provided code as a clue, not a final classification. It can be incomplete, China-export-specific, or mismatched to your destination's rules. Verify against the official tariff and your product's actual material and use.
Chapter 28
Explore Inorganic chemicals; compounds of precious metals and isotopes
Sourcing solid from 1688?
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