Potassium sodium tartrate tetrahydrate

Potassium sodium tartrate tetrahydrate (CAS 6381-59-5), also known as Rochelle salt and approved as E337, is a double salt of tartaric acid.

Where is Potassium sodium tartrate tetrahydrate used?

• Food processing: buffers pH in confectionery, dairy and baked goods while sequestering metal ions
• Pharmaceuticals: excipient in effervescent formulations and laxative preparations
• Personal care: chelates trace metals in creams and lotions
• Electroplating baths and analytical reagent applications: complexing agent
• It functions as a buffering agent, chelating agent and stabilizer in formulated products.

Good to know: Metal ions sequestered in food would otherwise accelerate oxidative spoilage. Consistent purity is critical for industrial uses.

Commercial specifications

• Pharmaceutical supply meets USP and BP/Ph. Eur. standards