Disodium hydrogen phosphate dodecahydrate

Disodium hydrogen phosphate dodecahydrate (CAS 10039-32-4), commonly abbreviated as DSP, is the fully hydrated crystalline form of dibasic sodium phosphate. It functions primarily as a pH buffer, sequestrant, and stabilizing agent across pharmaceutical, food processing, and water treatment applications.

In pharmaceutical manufacturing, DSP is used to prepare buffer solutions and stabilize injectable formulations where precise pH control directly affects product shelf life and efficacy. Food processors incorporate it as a sequestrant in processed cheese, dairy products, and cured meats.

In these food applications, it controls texture and prevents fat separation. Water treatment facilities use DSP to adjust alkalinity and inhibit scale formation in distribution systems and boiler feed water. It also supports detergent and cleaning formulations where phosphate-based sequestration is required.

This sequestration of calcium and magnesium ions is necessary to maintain product performance in hard water conditions. Disodium hydrogen phosphate dodecahydrate is supplied as white crystalline granules or powder. It is available in USP, BP, and Ph. Eur. grades for pharmaceutical applications.

The material is also available in food-grade specifications meeting FCC standards. Technical grade is also offered for industrial water treatment and cleaning applications, typically in bulk quantities. These various grades ensure the product meets the specific purity requirements of each industry.

Whether used as a buffering agent in medicine or a stabilizer in the food industry, this compound remains a versatile chemical essential for modern manufacturing. Its high solubility and reliable performance make it a preferred choice for global chemical distributors and industrial users.