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 used across food, pharmaceutical, and cosmetic manufacturing.

It functions primarily as a buffering agent, chelating agent, and stabilizer in formulated products. In food processing, E337 buffers pH in confectionery, dairy, and baked goods while sequestering metal ions.

These metal ions would otherwise accelerate oxidative spoilage. Pharmaceutical manufacturers use it as an excipient in effervescent formulations and laxative preparations, where its buffering capacity supports product stability.

In personal care, it chelates trace metals in creams and lotions, protecting active ingredients from degradation during shelf life. It also serves as a complexing agent in electroplating baths and analytical reagent applications.

Consistent purity is critical for these industrial uses. Potassium sodium tartrate tetrahydrate is supplied as a white crystalline powder or granules. Food-grade material is available to FCC specification.

Pharmaceutical supply meets USP and BP/Ph. Eur. standards. Technical grade is also available for industrial and laboratory use, ensuring versatility across various manufacturing sectors.