Potassium Sodium (+)-Tartrate 4H₂O – LR Grade, 500g (Rochelle Salt)

Potassium Sodium (+)-Tartrate Tetrahydrate, commonly known as Rochelle Salt, is supplied in a 500g container and manufactured to Laboratory Reagent (LR) grade. This compound is widely used in educational science laboratories due to its versatility, predictable behaviour, and suitability for a range of chemistry and physics demonstrations.

Identified by CAS Number: 6381‑59‑5 and with no UN number, this substance is not classified as hazardous for transport when handled correctly. It is a water‑soluble double salt that crystallises readily, making it ideal for practical investigations involving crystallisation, solubility, and ionic compounds.

Supplied in a generous quantity for repeated classroom use, Potassium Sodium Tartrate is easy to store, measure, and prepare, supporting consistent results across multiple practical sessions.

Key Features

• Potassium Sodium (+)-Tartrate 4H₂O (Rochelle Salt)
• Laboratory Reagent (LR) grade
• 500g pack – ideal for regular educational use
• CAS No: 6381‑59‑5
• No UN number – non‑hazardous for standard handling
• Water‑soluble and suitable for crystal growth
• Supplied for school laboratories and prep rooms

Ideal for School Science Lessons

Potassium Sodium Tartrate is well suited to KS3, GCSE, and A‑Level science lessons, particularly within chemistry topics covering salts, ions, and crystallisation. Its predictable crystal formation also makes it useful for interdisciplinary teaching.

• Growing and observing crystals
• Investigating solubility and saturated solutions
• Studying double salts and ionic compounds
• Supporting discussions on chemical bonding and hydration
• Developing practical skills such as weighing, dissolving, and filtering

Reliable, safe to use, and highly effective for hands‑on learning, Potassium Sodium (+)-Tartrate LR Grade is a valuable and versatile reagent that supports engaging and curriculum‑aligned science education.