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Melting point / freezing point

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Link to relevant study record(s)

Description of key information

- Melting starts at 62.5 degrees Celsius

Key value for chemical safety assessment

Melting / freezing point at 101 325 Pa:
62.5 °C

Additional information

In a key study, the melting range of the test item Phosphonic acid (Phosphorous acid Flake)was determined based on the procedures indicated by the following internationally accepted methods:

- OECD Guideline 102

- EU Method A.1

- EPA OPPTS 830.7200

The test item showed five stages of melting. The melting started at 62.5 °C. At 74.3 °C the final stage of melting was reached. No solid particles were left.