-
500–509
- Mineral acids & bases (8)
-
510–519
- Chlorides & sulphates (10)
-
520–529
- Sulphates & hydroxides (10)
-
530–549
- Alkali metal compounds (14)
-
550–559
- Silicates (12)
-
570–579
- Stearates & gluconates (10)
-
580–599
- Others (5)
