TK-1 Test kit for pH & Cl

The basic test for domestic and light commercial use. Kit contains OTO (Orthotolidine) 20ml and Phenol Red 20ml in dropper bottles and a combined color-scale plastic test tube unit with coloured plugs.

Image indicative only. Brand according to stock. There are many brands on the market, they all contain exactly the same chemical reagents. The only difference is the price. Some of the more expensive ones are designed with slightly larger plastic tubes which require 5 or 6 drops instead of 3 or 4 to make you use it up quicker. The result of the test is exactly the same with the cheaper test kits.

Contains

Orthotolidine, o-tolidine, OTO; An organic compound with the chemical formula (C₆H₄(CH₃)NH₂)₂. It was widely used as a reagent or indicator in analytical, clinical and forensic chemistry, such as in the analytical determination of gold, or determination of the chlorine level in swimming pool water.

Phenol red (phenolsulfonphthalein or PSP) is a pH indicator frequently used in cell biology laboratories with the chemical formula C₁₉H₁₄O₅S. It is sometimes labelled with a different name, such as "Guardex Solution #2". It is widely used as a pH indicator in home swimming pool test kits

Available reagent refils:

Screw cap  bottles

30cl Phenol & 30cl OTO

1 x 60cl OTO

1 x 60cl PHENOL

Dropper bottles

1 x 15cl Phenol, 1 x 15cl OTO