Registration Dossier
Registration Dossier
Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.
The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.
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EC number: 938-679-9 | CAS number: 308062-29-5
Endpoint summary
Administrative data
Description of key information
Additional information
The substance is manufactured and supplied as an aqueous solution. For the purposes of REACH compliance it is necessary to have a dry sample of the substance. Previous attempts to freeze dry other members of the category, namely C12-14 and C12-18 AO had proved unsuccessful , with either a high residual water content (23 %w/w in the case of C12-18 AO) or degradation over a short period of time (in the case of C12-14 AO). Due to this previous experience, it was decided not to attempt to freeze dry a sample of C14-16 AO and instead to use literature data and read across where necessary as described below.
The 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 amine 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 based on read across to C12 -14 AO. The vapour pressures of the individual alkyl dimethylamine oxides were estimated using MPBPWIN v 1.43 (modified grain method). Based on these calculations, the vapour pressure of the substance is estimated to be between 1.7E-06 and 6.7E-06 Pa at 25 °C. The substance is surface active with a surface tension of 31.6 -31.8 mN/m at 21.5 +/-0.5 °C. The dissociation constant is 4.01 based on read across from experimental data for C12 -14 AO. 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 based on read across to a test performed on C12 -14 AO. The log Pow 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 the log Pow derived from experimental estimates of solubility in n-octanol and water was -0.04.
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