Registration Dossier
Registration Dossier
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EC number: 258-061-6 | CAS number: 52636-67-6
Boiling point
Administrative data
Link to relevant study record(s)
Description of key information
In accordance with column 2 Annex VII section 7.3 and Annex XI of Regulation (EC) No 1907/2006 (REACH) and ECHA guidance on IR/CSA Chapter R.7.1.3.4 (as of November 2012) the study does not need to be conducted as the substance decomposes before boiling. Morpholinium sulphamate is the reaction product of morpholine and sulphamidic acid and thus is classified as organic salt. The physical properties of the starting material were as follows: Sulphamidic acid decomposes on melting at temperatures above 205 °C. The boiling point was predicted to be 600 °C. Morpholine has a melting point of -4.9 °C and a boiling point of 128.3 °C. The melting temperature of morpholinium sulphamate was determined to be 118-121 °C. Due to the ionic bonding and the resulting intermolecular interaction the melting point of morpholinium sulphamate is clearly higher than the melting point and close to the boiling point of morpholine. It was predicted that the boiling point of morpholinium sulphamate is above the decomposition temperature of sulphamidic acid. Thus, the determination of the study was scientifically unjustified as up to the decomposition temperature of sulphamidic acid at 205 °C no boiling point for morpholinium sulphamate was expected.
Key value for chemical safety assessment
Additional information
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.
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