Synthesis chemical lab is one of the leading whole sale and retail trader in coimbatore , we are the leading supplier of chemicals, speciality chemicals , and lab and commercial grade. A universal indicator is a mixture of different types of indicators that exhibits different coloration at different levels. It is used to detect the acidic or basic nature of a substance or a solution. The common application of indicators is the detection of end points of titrations. The colour of an indicator alters when the acidity or the oxidizing strength of the solution, or the concentration of a certain chemical species, reaches a critical range of values. Synthesis chemical lab.