Registration Dossier
Registration Dossier
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EC number: 231-901-9 | CAS number: 7778-39-4
Melting point / freezing point
Administrative data
Link to relevant study record(s)
Description of key information
The melting point value of arsenic acid hemihydrate is determined to be 35.0°C.
Key value for chemical safety assessment
- Melting / freezing point at 101 325 Pa:
- 35 °C
Additional information
Several values bibliographic sources are available and provide melting point values in the range 35.0-36.1°C. Those values are attributed to arsenic acid hemihydrate. Two key values are available 35°C and 36.1°C. The lowest value (35.0°C) is retained as key value since two other sources (flagged as supporting study) provide values much closer than 35.0°C rather than 36.1°C.
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