2pcs Correct Experiment Device Cobalt Glass Blue Reflective Tempered Glass Glass Cobalt Pieces Scientific Supplies Chemistry Experiment Tool

- Blue cobalt glass is a special fire viewing glass, mainly used in chemical laboratories to observe fire through potassium flame reaction, and plays a role of filtration and protection.

- The production process of blue cobalt glass is special. Special glass made by adding "cobalt blue" (the main component is cobalt metaaluminate: Co(AlO2)2) during the production process.

- It is also used in many places in industry (such as steel plants, cement plants, industrial kilns). Adding cobalt blue gives the glass a special blue color, so it is named blue cobalt glass.

- When observing the flame reaction of potassium, you need to use blue cobalt glass, because the potassium compound is not pure and is often mixed with some impurities, such as sodium (diffit to separate).