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EC number: 229-222-8
CAS number: 6440-58-0
Reliable (Klimisch 1 or 2) studies on adsorption have been conducted for DMDMH or the hydrolysis product of DMDMH, DMH, and available adsorption studies indicate that Koc value for DMDMH was <17.8 and ranged from 23.4 to 147 for DMH, with an average of 80.2. Therefore, DMDMH and the hydrolysis product are classified as having low potential (high mobility) for adsorption in soil or sewage sludge.
(Klimisch 1 or 2) studies on adsorption have been conducted for DMDMH or
the hydrolysis product of DMDMH, DMH, and are considered relevant for
environmental fate and ecotoxicology for inclusion this dossier.
(1992) conducted a reliable (Klimisch 1) GLP compliant study following
EPA 40 CFR 158.130 methods. A
soil/sediment study adsorption-desorption study was conducted with
aqueous solutions of 14C-DMH with four different soils (sand, sandy
loam, and two clay loams of differing organic matter content) under dark
conditions at a temperature of 25 ± 1°C. The Koc for all four soil types
tested were 23.4 (clay loam), 61.9 (sandy loam), 88.3 (clay loam), and
147 (sand), with an average of 80.2; therefore DMH is considered to have
high mobility in soil.
and Mullee (2001) conducted a reliable (Klimisch 1) GLP compliant study
following OECD 121 methods. The
adsorption coefficient (Koc) for DMDMH conducted in soil/sewage sludge
was determined to be <17.8, log10 Koc <1.25.
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