Registration Dossier
Registration Dossier
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EC number: 273-732-3 | CAS number: 69012-32-4 By-product of smelting of phosphate rock, silica and coke in manufacture of phosphorus.
Melting point / freezing point
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.
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