this is the sodium salt of sulphuric acid, and you can dispose of it safely after neutralizing it with baking soda. Rit dye can provide coloring. Overall, this is a good trick to anodize with ...

The synthesis is pretty straightforward, if a bit dangerous. An excess of sulfuric acid is added to potassium nitrate, and more or less pure nitric acid is distilled away from the resulting ...

A turquoise lake of sulfuric acid bubbles like a sorcerer's cauldron ... Although the sulfur dioxide fumes corroded the anodized finish on Guariglia's camera equipment, many of the men have ...