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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

Diss Factsheets

Physical & Chemical properties

Melting point / freezing point

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Description of key information

The melting point determination of Trisodium 3-hydroxy-4-(4'-sulphonatonaphthylazo) naphthalene-2,7-disulphonate (CAS No.915-67-3) was done following OECD Guideline 102 and according to the metal block capillary method. The test item does not show any change till 350°C at 966.25 hPa,thus its melting point is inferred to be greater than 350 °C.

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Additional information

The melting point determination ofTrisodium 3-hydroxy-4-(4'-sulphonatonaphthylazo) naphthalene-2,7-disulphonate (CAS No.915-67-3)was done following OECD Guideline 102 and according to the metal block capillary method. The test item does not show any change till 350°C at966.25 hPa,thus its melting point is inferred to be greater than 350 °C.