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Particle size distribution (Granulometry)

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In the non-GLP Klimisch 1 study from Bütfering (2012) the particle size distribution of the test item Butanedioic acid, 2(or 3)-sulfo-, 4-[2-[(1-oxo(C12-C18(even numbered) and C18unsaturated)alkyl))amino]ethyl]esters, disodium salts was determined using the sieving method according to DIN 66165 with sieve sizes ranging from 125 to 5000 µm. The mass median diameter (MMD) of the test item was calculated to be 3657µm.

This result is considered relevant and reliable for the risk assessment.