Aluminium Potassium Sulphate 12‑Water (Potassium Alum) – LR Grade, 500 g

Aluminium Potassium Sulphate 12‑Water, commonly known as Potassium Alum or Alum, is supplied in a 500 g pack and manufactured to Laboratory Reagent (LR) grade. This hydrated inorganic salt is widely used in educational chemistry laboratories for studying crystallisation, solubility, and the properties of ionic compounds.

Identified by CAS Number: 7784‑24‑9 and with no UN number, aluminium potassium sulphate dodecahydrate is not classified as hazardous for transport when handled appropriately. It is a colourless to white crystalline solid that dissolves readily in water, making it particularly suitable for crystal growth experiments and purification studies.

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

Key Features

• Aluminium Potassium Sulphate 12‑Water (Potassium Alum)
• Also known as Alum, Kalinite
• Laboratory Reagent (LR) grade
• 500 g pack – suitable for educational use
• CAS No: 7784‑24‑9
• No UN number – non‑hazardous for standard handling
• Water‑soluble crystalline solid
• Ideal for crystal growth and purification experiments
• Clearly labelled for safe storage and handling
• Suitable for school chemistry laboratories and prep rooms

Ideal for School Science Lessons

Aluminium Potassium Sulphate is well suited to KS3, GCSE, and A‑Level chemistry lessons, particularly when studying salts, crystallisation, and solution chemistry. All practical work should be conducted under appropriate supervision.

• Growing large, well‑defined crystals
• Studying solubility and crystallisation
• Investigating hydrated salts
• Supporting lessons on ionic compounds
• Developing practical skills in dissolving, heating, and cooling solutions

Reliable, visually impressive, and highly curriculum‑relevant, Aluminium Potassium Sulphate 12‑Water LR Grade 500 g is a valuable teaching reagent that supports effective practical chemistry while reinforcing good laboratory technique and safe handling.