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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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.
Use of this information is subject to copyright laws and may require the permission of the owner of the information, as described in the ECHA Legal Notice.
EC number: 249-276-6 | CAS number: 28872-01-7
Endpoint summary
Administrative data
Description of key information
Additional information
Triamine C16-18 and tetramine C16 -18 are surface-active substance. They consist of a hydrocarbon part which on its own would be poorly soluble in water, and a hydrophilic poly aminopropane group. The substances are strong organic bases with pKa values which range from 9 for the first amine and stepwise lower pKa’s for each next amine to be protonated.Under environmental conditions the main fraction will therefore at least be once or twice protonated. Salts with anorganic acids like sulphate, phosphate or silicate is poorly or not soluble and is not surface-active in water. Salts with organic acids like acetic acid, benzoic acid, benzoesulfonic acid and others is more soluble.
Triamine C16 -18 and tetramines C16 -18 are thus for more than 99% protonated under environmental conditions. This means that they will behave as salts in water and will have a very low vapour pressure. The solubility of these waxy cationic surface active substances will be influenced by the pH and is difficult to determine because of the surface active properties. As an alternative as suggested by the REACH guidance R.7 the CMC at pH 7 was determined. Evaporation from water is based on the low vapour pressure and the observed CMC values very unlikely. The actual dissolved concentration in water will be extremely low as the triamines C16 -18 and tetramines C16 -18 will sorb strongly to sorbents both based on hydrophobisity and ionic interaction where the ionic interaction will govern the partitioning process.
The distribution of polyamines C16-18 can be predicted assuming infinite time for equilibration using a Mackay level 1 model (MW = 440.8 g/mol; VP = 0.047 mPa; S = 40 mg/L and Log Kow = 7.285 to predict sorption). As it is in such a model is necessary to take into account the compartment of release the main fraction 97.7% is predicted to end up in soil. The remaining fraction is predicted to be found in sediment 2.4% and water 0.006%.
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.
