Registration Dossier
Registration Dossier
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EC number: 701-311-0 | CAS number: -
Melting point / freezing point
Administrative data
Link to relevant study record(s)
Description of key information
A study conducted according to EU Method A1 gave the melting temperature of boric acid as > 1000 ºC. It is anticipated that if EC 701 -311 -0 could be isolated from the chemical matrix in which it is made, it would also exhibit a similar very high melting point in theory. It is more likely that this substance would rather decompose affording calcium oxide and boric anhydride
Key value for chemical safety assessment
- Melting / freezing point at 101 325 Pa:
- 1 273 K
Additional information
No melting point can be defined in the range 25 - 1000 °C due to the decomposition of the substance. If heated above 100 °C, water is lost and boric acid converts initially to metaboric acid (HBO2) and on further heating forms boric oxide (B2O3) Cordia JA et al(2003).
It is anticipated that if Boric acid, calcium salt could be isolated from the chemical matrix in which it is made, it would also exhibit a similar very high melting point in theory. It is more likely that this substance would rather decompose affording calcium oxide and boric anhydride.
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