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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

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Category name:
Alkyl Naphthalene Sulfonates

Justifications and discussions

Category definition:
The Sodium alkylnaphthalene sulfonates are substances derived from sulfonation of a naphthalene fraction with sulfuric acid, which is subsequently alkylated either with alkenes or alcohols under catalysis of the sulfuric acid. The sulfonic acid is neutralised with sodium hydroxide. The resulting sodium alkylnaphthlene sulfonates are marketed without further purification. The structure varies only with substitution degree, and alkyl chain length of the substituents. The phys-chem, fate and tox-and ecotoxicology properties are expected to be similar or vary in a predictable pattern based only on the variation in alkylsubstitution.
Category rationale:
Category justification for Sodium Alkyl Naphthalene Sulfonates is based upon the following:

• A common functional group
• Common constituents
• Common breakdown products, metabolic pathway