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EC number: 931-292-6
CAS number: 308062-28-4
substance is manufactured and supplied as an aqueous solution. For the
purposes of compliance, attempts were made to freeze dry a sample of the
substance so that some of the applicable physico-chemical testing could
be completed. NMR and IR were used to confirm that the freeze drying
process had not degraded the substance immediately after drying.
However, water solubility and partition coefficient, gave unexpected
results. Further analytical work subsequently confirmed that the dry
substance had degraded to some extent, forming the free amine. This
reduced the reliability of studies performed using the freeze-dried
substance, namely relative density, surface tension, water solubility,
log Kow and flammability.
substance is a highly hygroscopic white solid with a melting point
expected to be in the range of 126 -136 °C, based on the melting points
of the pure alkyl dimethylamine oxide (AO) constituents. Aliphatic amine
oxides undergo thermal decomposition/Cope elimination between 110 -200
°C. The relative density of the substance is approximately 0.716. The
vapour pressure is estimated to be between 1.6E-06 and 7.5E-05 Pa, based
on the estimated vapour pressures of the individual AO constituents. The
substance is surface active with a surface tension of 34.1 mN/m at 20ºC.
The dissociation constant is 4.01. The substance is predicted to be
non-explosive based on chemical structure and oxygen balance of the AO
constituents and non-oxidising, based on chemical structure. The
substance is non-flammable.
log Kow is < 2.7. This value is considered to be conservative as it is
based on the measured value for solubility in n-octanol and the CMC
values for the C12 and C14 homologues. For comparison, a log Kow of
-1.08 is derived from the measured n-octanol solubility of 33.9 g/L and
the measured water solubility of 409.5 g/L.
Information on Registered Substances comes from registration dossiers which have been assigned a registration number. The assignment of a registration number does however not guarantee that the information in the dossier is correct or that the dossier is compliant with Regulation (EC) No 1907/2006 (the REACH Regulation). This information has not been reviewed or verified by the Agency or any other authority. The content is subject to change without prior notice.Reproduction or further distribution of this information may be subject to copyright protection. Use of the information without obtaining the permission from the owner(s) of the respective information might violate the rights of the owner.
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