Description

Diphosphoric Acid, Sodium Salt is a versatile inorganic phosphate compound, also known as Sodium Acid Pyrophosphate (SAPP). This chemical is valued for its role as a leavening agent, buffering agent, and sequestrant in various industrial processes. It is essential for manufacturers in the food production, water treatment, and detergent industries seeking reliable, high-purity functional ingredients.

Application

• Food Processing: Primarily used as a leavening acid in baked goods, cake mixes, and refrigerated doughs to control the rate of carbon dioxide release.
• Water Treatment: Acts as a sequestering agent to control water hardness and prevent scale formation in industrial water systems.
• Detergent & Cleaning Formulations: Functions as a builder to enhance cleaning efficiency by chelating metal ions that interfere with surfactants.
• Oil Drilling Fluids: Employed as a thinning agent and for controlling rheological properties in drilling muds.
• Metal Treatment & Plating: Used in electroplating baths and for derusting and cleaning metal surfaces.
• Ceramic & Clay Processing: Serves as a dispersant to reduce viscosity and improve workability of ceramic slips and clay bodies.

Basic Information

Product Name	Diphosphoric Acid, Sodium Salt
CAS No.	10042-91-8
Molecular Formula	Na2H2P2O7
Molecular Weight	221.94 g/mol
Synonyms	Sodium Acid Pyrophosphate (SAPP); Disodium Dihydrogen Diphosphate; Disodium Dihydrogen Pyrophosphate; Disodium Pyrophosphate, Acidic; Sodium Dihydrogen Pyrophosphate; E450(i); INS 450(i); Food Grade SAPP
EINECS	233-126-4

Quality Control

Our Diphosphoric Acid, Sodium Salt is manufactured under a stringent quality management system. Production adheres to relevant food-grade specifications (where applicable), such as FCC (Food Chemicals Codex) guidelines, ensuring suitability for sensitive applications. Certificates of Analysis (COA) documenting purity, assay, and impurity profiles are available for every batch upon request.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at room temperature (15-25°C). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept tightly sealed to prevent caking and degradation from atmospheric moisture.

Specification

Item	Specification
Appearance	White crystalline powder or granules
Identification (IR)	Conforms
Assay (as Na2H2P2O7)	≥ 95.0 %
pH (1% Solution)	3.5 - 4.5
Water Insoluble Matter	≤ 1.0 %
Heavy Metals (as Pb)	≤ 10 ppm
Arsenic (As)	≤ 3 ppm
Fluoride (F)	≤ 10 ppm

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.