Registration Dossier
Registration Dossier
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EC number: 915-277-1 | CAS number: 32052-51-0
Endpoint summary
Administrative data
Description of key information
Additional information
Substance: According to a Mackay Level I model calculation the main target compartments for 2,2,4(or 2,4,4)-trimethylhexane-1,6-diisocyanate will be sediment (30 %) and soil (30 %) followed by the atmosphere (28 %) and the hydrosphere (12 %). The calculated Henry’s Law constant of 6.51 Pa m³/mol at 20 °C indicates moderate volatility of 2,2,4(or 2,4,4)-trimethylhexane-1,6-diisocyanate from surface waters. With a calculated Koc of 22570 l/kg, the sorption potential of 2,2,4(or 2,4,4)-trimethylhexane-1,6-diisocyanate to soil or sediment organic matter is expected to be very high (Blume scale). However, environmental transport and distribution considerations for 2,2,4(or 2,4,4)-trimethylhexane-1,6-diisocyanate are of little relevance because the reaction with water is expected to eliminate the substance from the environment rapidly.
Hydrolysis product: According to a Mackay Level I model calculation the main target compartments for 2,2,4(or 2,4,4)-trimethylhexane-1,6-diisocyanate will be the hydrosphere (99.97 %) followed by the atmosphere (0.02 %). The calculated Henry’s Law constant of 0.00063 Pa m3/mol indicates very low volatility of 2,2,4(or 2,4,4)-trimethylhexane-1,6-diamine from surface waters. With a calculated Koc = 25, log Koc = 1.40 (pH 7; Franco and Trapp (2008)), the sorption potential of 2,2,4(or 2,4,4)-trimethylhexane-1,6-diamine to soil or sediment organic matter is expected to be very low (Blume scale).
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