Product Description
Potassium Sodium Tartrate (commonly known as Rochelle Salt) is a double salt of potassium and sodium with tartaric acid. It forms transparent, colorless crystals that are mildly alkaline in nature.
This compound is well-known for its piezoelectric and optical properties, making it useful in both analytical chemistry and industrial manufacturing. It serves as a reagent, buffer, emulsifier, and sequestering agent in laboratories and industries alike.

Key Features
- Chemical Name: Potassium Sodium Tartrate
• Chemical Formula: KNaC₄H₄O₆·4H₂O
• CAS Number: 6381-59-5
• Molecular Weight: 282.22 g/mol
• Appearance: Colorless, transparent crystals or crystalline powder
• Odor: Odorless
• Taste: Cooling, saline
• Solubility: Freely soluble in water; insoluble in alcohol
• pH (5% Solution): Slightly alkaline (≈7–8)
• Melting Point: Decomposes above 70°C (loss of water of crystallization)
Applications
- Laboratory Applications
• Used as a reagent in Fehling’s solution for detecting reducing sugars.
• Acts as a complexing agent in various analytical and volumetric titrations.
• Serves as a stabilizer and buffer in biochemical and pharmaceutical testing. - Industrial Applications
• Used in electroplating baths and metal cleaning formulations.
• Employed in textile and printing industries as a mordant and sequestering agent.
• Applied in the food and beverage industry as an additive (E337) for maintaining stability and texture. - Special Properties
• Exhibits piezoelectric behavior, historically used in crystal microphones and phonograph pickups.
• Functions as a mild reducing agent and stabilizer for chemical formulations.
Safety & Handling
- Hazard: Non-toxic in moderate quantities but may cause irritation on prolonged contact.
• Precautions: Avoid ingestion in large amounts. Use gloves and protective eyewear during handling.
• Storage: Store in tightly closed containers in a cool, dry place. Protect from moisture and heat.
• Disposal: Dispose of according to local environmental and safety regulations.
Why Choose Potassium Sodium Tartrate?
- High-purity grade suitable for analytical, laboratory, and industrial uses.
• Excellent solubility and stability in aqueous solutions.
• Dual functionality as a reagent and additive.
• Reliable consistency and long shelf life.
Price in Bangladesh
Available in standard packaging sizes (250 g, 500 g, 1 kg, and bulk quantities).
Competitive pricing with discounts for bulk and institutional orders.
Where to Buy
Potassium Sodium Tartrate (Rochelle Salt) is available from certified chemical and laboratory suppliers across Bangladesh.
Why Buy from M/S Bright Scientific Co.?
- Trusted Supplier: Reliable source for lab and industrial chemicals.
• Guaranteed Quality: Verified purity and composition.
• Affordable Rates: Economical pricing for small and large-scale users.
• Nationwide Delivery: Fast and secure shipping throughout Bangladesh.
Contact Information
M/S Bright Scientific Co.
📞 Phone: 01711285976






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