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Environmental fate & pathways

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Description of key information

Adsorption / desorption

The Adsorption Coefficient of test substance Hydrogen [4-[4-(dimethylamino)-α-(2-hydroxy-3,6-disulphonato-1-naphthyl)benzylidene]cyclohexa-2,5-dien-1-ylidene]dimethylammonium, monosodium salt (CAS No. 3087-16-9)was determined as per the HPLC method (OECD Guideline-121). The Log Koc value was found to be 0.269 ± 0.0 at at 25°C.

Additional information

Adsorption / desorption

The adsorption coefficient Koc in soil and in sewage sludge Hydrogen [4-[4-(dimethylamino)-α-(2-hydroxy-3,6-disulphonato-1-naphthyl)benzylidene]cyclohexa-2,5-dien-1-ylidene]dimethylammonium,monosodium salt(CAS No.3087-16-9) was determined by the Reverse Phase High Performance Liquid Chromatographic method according to OECD Guideline No. 121 for testing of Chemicals. The reference substances were chosen according to functional group similarity with the test substance and calibration graph prepared. The reference substances were xylene, ethylbenzene, toluene, naphthalene and phenol having Koc value ranging from 1.32 to 2.75. The Log Koc value was found to be 0.269 ± 0.0 at 25°C.