3. Ammonium purpurate :
Physical properties :Physical properties :
Physical state at 20° C - SolidPhysical state at 20° C - Solid
Colour – Red powderColour – Red powder
Melting point – >300 ° CMelting point – >300 ° C
Odour – OdourlessOdour – Odourless
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4. Bromopyrogallol Red :
Physical properties :Physical properties :
Physical state at 20° C - SolidPhysical state at 20° C - Solid
Colour – Reddish brownColour – Reddish brown
Vapour Density – 19.2Vapour Density – 19.2
Melting point - 300 °Melting point - 300 °
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5. Calceine Indicator :
Physical properties :Physical properties :
Physical state at 20° C - SolidPhysical state at 20° C - Solid
Colour – Brown OrangeColour – Brown Orange
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