ALDON Innovating Science Laboratory-Grade Universal Indicator Solution, 500mL - The Curated Chemical Collection

Works good. Colour change easy to observe.

I used this in my Potion Making Camp with various liquids of various pH and it worked perfect! We were able to get a rainbow of colors. There is a warning on the label about cancer and reproductive harm, so I simply wore gloves and did not allow children to come into contact with this.

I use this to demonstrate pH changes in household chemicals during science demos. The colors are very strong and react instantaneously in solution to acids and bases. It can range in color from vibrant red (pH 4) to deep purple (pH 10) and ten colors in between. It is lab quality strength and lasts years if kept in the sealed original bottle.

I used it for my middle school chemistry class. It worked well for our PH test, and had accurate results. The price was a bit much but it was a very large bottle that will last a long time.

I am a chemistry teacher and ran out of UI in the middle of the acid and base unit. This was well priced, delivered quickly and work as expected. Would buy again but hope I don’t have too lol