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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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: 231-714-2 | CAS number: 7697-37-2
Boiling point
Administrative data
Link to relevant study record(s)
Description of key information
Weight of evidence based on four peer-reviewed data from handbooks (83, 83, 83.4 and 83-87 deg C).
Key value for chemical safety assessment
- Boiling point at 101 325 Pa:
- 356 K
Additional information
Three determinations indicate a boiling point, one a boiling range. As detailed information on purity is not provided in the handbooks it is concluded that the boiling range results from a less pure substance. The boiling point is therefore concluded to be the mean of the three boiling point values.
In addition, in a supporting study it was indicated that mixtures of nitric acid and water, when boiled, undergo such a change that the weak mixtures lose water, and the strong mixtures lose acid, until the residual liquid attains a specific gravity of 1.42, and boils, under the ordinary atmospheric pressure, steadily at 120°C (Roscoe, 1861).
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.
