Registration Dossier

Administrative data

Endpoint:
melting point/freezing point
Data waiving:
study technically not feasible
Justification for data waiving:
other:

Data source

Materials and methods

Results and discussion

Applicant's summary and conclusion

Conclusions:
In accordance with REACH Annex XI, the Melting/freezing point study (required in section 7.2) does not need to be conducted as this test is technically not feasible. The melting point of phosphorous slags is estimated to be well above 1,000 degrees Celsius, based on melting during the production process at > 1000 C. Current OECD guidelines provide no methodology for determining melting points above 1,000 degrees Celsius. Due to the extreme requirements for testing the melting point of phosphorous slags and the fact that no guidelines for testing at these temperatures is available, we suggest that a test for this endpoint should be waived.
Executive summary:

In accordance with REACH Annex XI, the Melting/freezing point study (required in section 7.2) does not need to be conducted as this test is technically not feasible. The melting point of phosphorous slags is estimated to be well above 1,000 degrees Celsius, based on melting during the production process at > 1000 C. Current OECD guidelines provide no methodology for determining melting points above 1,000 degrees Celsius. Due to the extreme requirements for testing the melting point of phosphorous slags and the fact that no guidelines for testing at these temperatures is available, we suggest that a test for this endpoint should be waived.