Qualitative pH Tests
These papers do not require the need for a colour chart as their purpose is to demonstrate qualitative analysis in a simple ‘yes’ and ‘no’ manner. They will not provide accurate pH measurement, but will change from one colour to another at a set pH value, depending on the paper. These user friendly test papers are suitable for many industrial and educational applications.
Whether it is for the determining the presence of strong oxidisers e.g. free chlorine, Johnson Test Papers offers litmus papers for the routine management of acid or alkaline reactions in industry.
|Litmus Blue Paper||pH < 7 red /> blue|
|Litmus Neutral Paper||pH < 7 red / > 7 blue|
|Litmus Red Paper||pH < 7 red/ > 7 blue|
|Congo Red Paper||pH < 3 blue-violet / pH > 5 red-orange|
|Turmeric Paper||pH < 6,8 yellow / pH > 8.6 red|
|Clayton Yellow Paper||pH < 12.0 yellow / pH > 13.0 red|
|Brilliant Yellow Paper||pH < 6.6 yellow / pH > 8.4 red|
|Phenolphthalein Paper||pH < 8.4 white / pH > 9.6 red|
|Methyl Orange Paper||pH < 3.0 red/ pH > 4.4 yellow|