Chromium(III) Potassium Sulphate 12‑Water (Chrome Alum) – LR Grade, 100 g

Chromium(III) Potassium Sulphate 12‑Water, commonly known as Chrome Alum, is supplied in a 100 g pack and manufactured to Laboratory Reagent (LR) grade. This hydrated double sulphate is widely used in educational chemistry laboratories for studying transition‑metal salts, crystallisation, and coloured compounds.

Identified by CAS Number: 7788‑99‑0 and with no UN number, chromium(III) potassium sulphate is not classified as hazardous for transport when handled appropriately. It appears as deep purple to violet crystals that dissolve in water, making it particularly suitable for visually striking crystallisation and solubility experiments.

Supplied in hydrated form (dodecahydrate), this compound provides consistent and reproducible results for practical investigations under standard school laboratory conditions.

Key Features

• Chromium(III) Potassium Sulphate 12‑Water (Chrome Alum)
• Laboratory Reagent (LR) grade
• 100 g pack – suitable for educational use
• CAS No: 7788‑99‑0
• No UN number – non‑hazardous for standard handling
• Purple crystalline hydrated salt
• Water‑soluble and ideal for crystallisation studies
• Clearly labelled for safe storage and handling
• Suitable for school chemistry laboratories and prep rooms

Ideal for School Science Lessons

Chromium(III) Potassium Sulphate is well suited to GCSE and A‑Level chemistry lessons, particularly when studying transition elements, hydrated salts, and crystallisation. All practical work should be conducted under appropriate supervision.

• Growing deeply coloured crystals
• Studying transition‑metal salts
• Investigating hydration and crystallisation
• Comparing properties of double salts
• Developing practical skills in dissolving, heating, and crystal formation

Visually striking, reliable, and curriculum‑relevant, Chromium(III) Potassium Sulphate 12‑Water LR Grade 100 g is a valuable teaching reagent that supports effective practical chemistry while reinforcing good laboratory technique and safe handling.