Sodium Thiosulphate 5H₂O Pure 1kg – High‑Purity LR Grade Laboratory Reagent

This high‑purity Sodium Thiosulphate 5H₂O Pure 1kg reagent is supplied as LR Grade and is ideal for a wide range of school and college chemistry experiments. Identified by CAS No. 10102‑17‑7 and carrying no UN hazard classification (UN Number: NR), this versatile compound is commonly used in analytical chemistry, redox investigations, and reaction‑rate studies.

Widely used in GCSE and A‑Level chemistry, Sodium Thiosulphate is essential for experiments involving iodine titrations, reaction kinetics, halogen chemistry, photographic fixing demonstrations, and more. Its reliability and consistency make it a must‑have reagent in school laboratories and prep rooms.

Key Features

• High‑purity LR Grade Sodium Thiosulphate Pentahydrate
• Supplied in a large 1kg container
• UN Number: NR (Not Regulated)
• CAS Number: 10102‑17‑7
• Excellent for iodine–thiosulphate titrations
• Ideal for investigating rates of reaction (e.g., disappearing cross experiment)
• Useful for halogen reduction and photographic chemistry demonstrations
• Suitable for use in educational establishments

How Sodium Thiosulphate Can Be Used in School Science Lessons

Sodium Thiosulphate is a highly versatile reagent that supports numerous curriculum‑aligned experiments. It is ideal for:

• Iodometric titrations at GCSE and A‑Level
• Reaction‑rate studies using the classic ‘disappearing cross’ method
• Oxidation–reduction experiments involving halogens
• Photographic fixing demonstrations
• Analyzing chlorine content in pool water (demonstration only)

Stable, easy to handle, and extremely reliable, this LR Grade Sodium Thiosulphate is an essential reagent for accurate and engaging practical chemistry lessons.