LINEAR ALKYLBENZENE SULFONATE (LAS) - UNEP Chemicals

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OECD SIDS LINEAR ALKYLBENZENE SULFONATE (LAS) 1. GENERAL INFORMATION 1.01 SUBSTANCE INFORMATION A. CAS number The information provided in this dossier refers to various individual compounds and mixtures of sulfonated linear alkyl benzenes which are identified by the following CAS numbers and names: CAS No. EINECS No. Name 1322-98-1 215-347-5 Decylbenzene sulfonic acid, sodium salt 25155-30-0 246-680-4 Dodecylbenzene sulfonic acid, sodium salt 26248-24-8 247-536-3 Tridecylbenzene sulfonic acid, sodium salt 27636-75-5 248-583-2 Undecylbenzene sulfonic acid, sodium salt 68081-81-2 268-356-1 C10-16 Monoalkylbenzene sulfonic acid, sodium salt 68411-30-3 270-115-0 C10-13 Alkylbenzene sulfonic acid, sodium salt 69669-44-9 274-070-8 C10-14 Alkyl derivatives benzene sulfonic acid, sodium salt 85117-50-6 285-600-2 C10-14 Monoalkylbenzene sulfonic acid, sodium salt 90194-45-9 290-656-6 C10-13 Alkyl derivatives benzene sulfonic acid, sodium salt 127184-52-5 4-C10-13-sec Alkyl derivatives benzene sulfonic acid, sodium salt B. Name (IUPAC name) See A. C. Name (OECD name) Linear alkylbenzene sulfonate (LAS) D. CAS Descriptor E. EINECS-Number See A. F. Molecular Formula See G. G. Structural Formula Relatively consistent mixture of homologues with predominately linear (currently >95% for most products) varying alkyl chain lengths (from C10 to C14) and phenyl isomers with attachment of the para sulfonate (sodium salt) benzene ring to the alkyl chain at non-terminal positions. This description applies to all of the CAS numbers listed in 1.01A as shown by the alkyl chain distribution in the table in 1.01G. CH 3 (CH 2 ) x CH(CH 2 ) y CH 3 S0 - Na + 3 where x+y=n and n=7-11 carbon units The linear alkyl carbon chain typically has 10 to 14 carbon units, with the approximate mole ratio varying somewhat regionally, as shown in the following table: UNEP PUBLICATIONS 110
OECD SIDS LINEAR ALKYLBENZENE SULFONATE (LAS) Region C14 Range of Averages Weighted Average* Canada 68081-81-2 Europe 25155-30-0 68081-81-2 ≤1
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LINEAR ALKYLBENZENE SULFONATE (LAS) - UNEP Chemicals

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