Safety Reference
Danger
Sourcing SULFUR TRIOXIDE?
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Sourcing SULFUR TRIOXIDE?
Post a free purchase request — no account needed. It reaches suppliers of this product, and replies go straight to your inbox.
Sulfur trioxide is a chemical compound with the formula SO3, produced industrially on a vast scale as a precursor to sulfuric acid and sulfonate-based surfactants. It is the most economically important sulfur oxide and is used primarily as a sulfonation agent.
Content scope: Information here supports chemical identification and industrial supply, research, and manufacturing contexts. It is not a therapeutic claim, medical advice, or drug-use instructions.
The international HS code for SULFUR TRIOXIDE (CAS 7446-11-9) is 2811.29.
2811.29
2811 29 10
Classification per the EU customs inventory ECICS (2026-07 snapshot, HS 2022). National tariff lines and product form can affect the final classification.
sulfur trioxide
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