Description

Sodium Tetraphosphate is an inorganic polyphosphate salt widely utilized for its superior sequestering and dispersing properties. This compound is valued for its ability to bind metal ions, control water hardness, and prevent scale formation in industrial systems. It serves as a critical processing aid and additive for manufacturers in the detergent, water treatment, textile, and ceramic industries, where consistent quality and reliable performance are paramount.

Application

• Detergent & Cleaning Formulations: Acts as a powerful builder to soften water, enhance surfactant efficiency, and prevent redeposition of soil.
• Industrial Water Treatment: Used as a scale and corrosion inhibitor in cooling towers, boilers, and reverse osmosis systems.
• Textile Processing: Serves as a dispersing and sequestering agent in scouring, bleaching, and dyeing baths to improve process uniformity.
• Ceramic & Clay Production: Functions as a deflocculant to control slurry viscosity and improve casting properties.
• Oil Field Applications: Employed in drilling muds and completion fluids to control fluid rheology and minimize scale.
• Food Processing (Food Grade): Used as a sequestrant, texturizer, and emulsifying salt in certain food products (subject to specific grade and regulatory approval).

Basic Information

Item	Detail
Product Name	Sodium Tetraphosphate
CAS No.	7727-67-5
Molecular Formula	Na6P4O13
Molecular Weight	469.86 g/mol
Synonyms	Tetrasodium Diphosphate; Sodium Polyphosphate (type IV); Graham's Salt (related polyphosphate); Sodium Tetrapolyphosphate; Hexasodium Tetraphosphate; Quadrafos; STPP Analog; Phosphate Glass (amorphous form)
EINECS	231-767-1

Quality Control

Our Sodium Tetraphosphate is manufactured under a stringent quality management system. Each batch is tested to ensure it meets precise specifications for purity, composition, and physical properties. Certificates of Analysis (COA) documenting key parameters such as assay, phosphate content, and heavy metal limits are provided to guarantee supply reliability and product consistency for your critical processes.

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 after initial use to prevent caking and degradation from atmospheric moisture.

Specification

Item	Specification
Appearance	White powder or granules
Identification (IR)	Conforms
Assay (as Na6P4O13)	≥ 95.0%
P2O5 Content	60.0 - 63.0%
pH (1% solution)	7.0 - 9.0
Water Insoluble Matter	≤ 0.1%
Heavy Metals (as Pb)	≤ 10 ppm
Loss on Drying	≤ 5.0%

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