Hengar Plain Boiling Granules are made of high purity, white, amphoteric alundum. Extremely hard porous surface that will not crumble. When boiling liquids, inert and insoluble, Hengar Boiling Granules effectively prevent super-heating with its attendant dangerous explosive vaporization. A few Hengar Granules in any boiling liquid permit a steady copious stream of bubbles...
Hengar Plain Boiling Granules are made of high purity, white, amphoteric alundum. Extremely hard...