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  inquire
Congo Red  573-58-0  3.0 – 5.2  blue – red inquire
Methyl Orange  547-58-0 3.1 – 4.4 red – yellow inquire
Tashiro Indicator N/A  4.2 – 6.3  purple – green inquire
Bromothymol Blue  76-59-5  6.0 – 7.6  yellow – blue inquire
Neutral Red  553-24-2  6.8 – 8.0  red – yellow inquire
Phenolphthalein  77-09-8  8.2 – 10.0  none – red inquire