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: 233-135-0 | CAS number: 10043-01-3
Aluminium sulphate (anhydrous) is a white, odourless, solid.
Octadecahydrate and other hydrated forms are expected to be solid too (from literature and experiment on analogue).
A reliable literature source is provided for the reference substance (anhydrous form), and is considered as key data.
Supporting information on the common hydrated forms 18 and 14 H2O is extrapolated from literature and from description of an analogue in an experimental report.
Aluminium sulphate (anhydrous) decomposes at 770°C (literature).
Hydrated forms undergo primary decomposition corresponding to crystal water loss from ca 80°C (from literature and experiment on analogue).
A reliable literature source is provided for the reference substance (anhydrous form), and is considered as key data. The same result was also found in numerous commonly used handbooks or databases, despite not peer reviewed. However the value of 770°C is associated with decomposition, and therefore will not be retained as key value for purpose of CSA (no solid-liquid transition).
A single, updated, reference handbook provides a non-consistent value, but as no details are available, the usual and lower value is retained.
Supporting information on the 18 H2O and on analogue in an experimental report show that the hydrated forms undergo primary decomposition corresponding to crystal water loss from ca 80°C.
Not a flammable solid (no propagation of combustion if contact with a flame) (from analogue).
Not a self-heating substance (no exothermic reaction) (from analogue).
Not pyrophoric. Not flammable if contact with water. (waived)
No data is available on the reference substance (anhydrous form), but reliable experimental studies were conducted on analogue, showing no propagation of combustion regarding flammability of solids, and no exothermal reaction, i.e. no self-heating. Despite the test substance was an hydrated grade, the study is considered suitable for purpose, and then retained as key, because heating will vaporise the crystallisation water from 80°C, as shown under 4.2, leaving the parent compound.
Moreover, supporting literature data indicates that the substance is used as a fireproofing agent, therefore as a weight of evidence, it should not have flammable properties.
Based on experience, no flammable properties are anticipated if contact with air or water, therefore studies were deemed unnecessary.
According to Regulation (EC) No.1272/2008 (CLP) criteria, the substance as solid failed to propagate combustion in the preliminary test (UN N1 preliminary test identical to EC A10), therefore it is NOT classified as a flammable solid.
According to Regulation (EC) No.1272/2008 (CLP) criteria, no exothermal reaction was observed in the UN N4 test, therefore the substance is NOT classified as self-heating.
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.
Welcome to the ECHA website. This site is not fully supported in Internet Explorer 7 (and earlier versions). Please upgrade your Internet Explorer to a newer version.
Close Do not show this message again