Indicators – pH Titrations

Acidimetry & Alkalimetry

These are sold in amber-coloured 50 ml dropper bottles. The solutions are ready to use.

Indicator CAS Number pH Range Colour Price
Malachite Green  123333-61-9  0.2 – 1.8  blue – green  $11.20
Congo Red  573-58-0  3.0 – 5.2  blue – red  $11.20
Methyl Orange  547-58-0 3.1 – 4.4 red – yellow  $11.20
Tashiro Indicator N/A  4.2 – 6.3  purple – green  $11.20
Bromothymol Blue  76-59-5  6.0 – 7.6  yellow – blue  $11.20
Neutral Red  553-24-2  6.8 – 8.0  red – yellow  $11.20
Phenolphthalein  77-09-8  8.2 – 10.0  none – red  $11.20