|
Halogen |
|
|
Alkali metals |
|
|
Mercury |
|
|
Hydrogen chloride, inorganic acids, silicon dioxide and sulphur dioxide |
|
|
Inorganic acids |
|
|
Sulphuric acid |
|
|
Phosphoric acid |
|
|
Polyphosphoric acids |
|
|
Hexafluorosilicic acid |
|
|
Sulphur dioxide |
|