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Melting point / freezing point

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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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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.