This Test Guideline describes a method which is an adaptation of the Soap and Detergent Association semi …-continuous activated sludge (SCAS) procedure for assessing the primary biodegradation of alkyl benzene sulphonate. The test does not … an aeration (SCAS) unit. The test compound (non-volatile, water soluble, organic, non-inhibitoring to bacteria at the …

This test guideline describes a test procedure to gain information on dispersion stability of manufactured … attain a colloidal dispersion and to conserve this dispersion under environmentally relevant conditions. The test procedure … concentration of the nanomaterial in a set of test vials while the particles undergo homoagglomeration and settling in environments …