3-ГИДРОКСИ-4-(2-ГИДРОКСИ-4-ßÒ½ýõ«-1-НАФТИЛАЗО) - 2-NAFTOYNAYA KISLOTA
|C21H14N2O7S||M of m 438,4|
|Crystal powder, black with violet shade.
It is almost water-insoluble, we will dissolve in 95% alcohol a little, we will dissolve in 50% alcohol and 50% acetone, we will easily dissolve in solutions of caustic alkalis.
At rn> 12,0 has blue coloring, and its complexes with calcium ion in the same conditions — reddish-lilac.
Transition of coloring at direct titration from reddish-lilac to blue.
Indicator solution: 0,025 g of the indicator dissolve in 100 ml 50% of alcohol or acetone.
Indicator mix: 0,25 g of the indicator and 25 g of sodium of chloride pound in mortar and mix.
9 years on Allbiz
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