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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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: 938-815-7 | CAS number: -
Melting point / freezing point
Administrative data
Link to relevant study record(s)
Description of key information
about 0-5 °C
Key value for chemical safety assessment
- Melting / freezing point at 101 325 Pa:
- 5 °C
Additional information
The melting/freezing point for the hydroxybenzene sulphonic acid has been measured at about -2°C. The influence of sulphuric acid and water is to lower considerably the melting point, due to sulphuric acid, which has this typical behaviour, depending on the water content. The presence of disulphonic acid, whose melting point value will be a little higher that for monosulphonic acid, is not enough to have an impact on the melting point of the multiconstituent, that will be not far from the zero degrees. The risk assessment consequence is that the substance at 25°C are in fact liquid
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.
