… Sulphur, sublimed or precipitated; colloidal sulphur. …
Explanatory notes
… of crude or impure sulphur, followed by condensation in the solid form (or sublimation) as fine, very light particles. … in the chemical industry or for vulcanising high‑grade rubber. This heading also includes “washed sublimed … here is always obtained by precipitating a solution of a sulphide, or of an alkaline or alkaline‑earth polysulphide, …