Indicators are substances whose solutions change color due to changes in pH. These are called acid-base indicators. They are usually weak acids or bases, but their conjugate base or acid forms have different colors due to differences in their absorption spectra. We offer a large range of high-quality indicators for observing chemical reactions. Our products available in different packaging sizes allow you to get all the indicators for your specific purposes from a single source. Our indicators will enable you to precisely define the endpoint for a wide range of titration categories. All our indicators are carefully tested to ensure accurate, reliable, and reproducible results.