Registration Dossier
Registration Dossier
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EC number: 222-657-4 | CAS number: 3567-69-9
Melting point / freezing point
Administrative data
Link to relevant study record(s)
Description of key information
The test item decomposes with colour change from red brown crystalline powder to black at 275 °C, but does not melt. Thus, the mean decomposition temperature was found to be 275 °C at 968.6 hPa.
Key value for chemical safety assessment
Additional information
The melting point determination of Test item Disodium 4-hydroxy-3-[(4-sulphonatonaphthyl)azo] naphthalene sulphonate (CAS No. 3567-69-9)was done as per the test guideline OECD 102. The method followed was according to Capillary/metal block. The test item decomposes with colour change from red brown crystalline powder to black at 275 °C, but does not melt. Thus, the mean decomposition temperature was found to be 275 °C at 968.6 hPa.
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