Explanatory notes
… in dyeing and in tanning (alum‑tanning). Used also in photography, toilet preparations, etc. (b) Aluminium … 2 O). Colourless crystals, soluble in water especially when hot. Used in the preparation of pure aluminium oxide and in … in dyeing as a mordant, in tanning (chrome‑tanning), in photography, etc. (b) Ammonium chromium sulphate (chrome …