Bromopyrogallol red

• 2 ', 7' -dibromo -1 ,1- dioxospiro [ benzo [ c] oxathiol -3, 9' -xanthene ] -3 ', 4 ', 5 ', 6'- tetrol (IUPAC)
• 3 ', 3 '' - Dibrompyrogallolsulfonphthalein

Dark brown solid

Fixed

> 300 ° C

Template: Infobox chemical / molecular formula search available

Bromopyrogallol is a triphenylmethane dye and is a member of the sulfonphthaleins. It is represented by bromination of pyrogallol.

Properties and Uses

Bromopyrogallol serves, inter alia, for the photometric determination of tin.