Description

Sodium Phosphate Tribasic Dodecahydrate is a high-purity inorganic salt widely used as a buffering agent, emulsifier, and nutrient source. Its consistent quality and reliable performance make it a critical raw material for formulations requiring precise pH control and mineral supplementation. This product is essential for manufacturers in the food, pharmaceutical, and industrial water treatment sectors seeking a dependable and compliant ingredient.

Application

• Food Industry: Used as an emulsifying salt in processed cheeses, a pH regulator in beverages, and a mineral supplement for nutritional fortification.
• Pharmaceutical Manufacturing: Serves as an excipient in tablet formulations, a buffering agent in parenteral solutions, and a source of phosphorus in electrolyte replenishers.
• Water Treatment: Acts as a corrosion inhibitor and scale control agent in industrial boiler water and cooling tower systems.
• Industrial Processes: Employed in metal surface treatment for cleaning and phosphating, and as a dispersing agent in ceramic and detergent production.
• Laboratory & Research: Used to prepare buffer solutions of defined ionic strength and pH for biochemical assays and analytical procedures.

Basic Information

Product Name	Sodium Phosphate Tribasic Dodecahydrate
CAS No.	10101-89-0
Molecular Formula	Na3PO4·12H2O
Molecular Weight	380.12 g/mol
Synonyms	Trisodium Phosphate Dodecahydrate; TSP-12; Sodium Orthophosphate Tribasic Dodecahydrate; Trisodium Orthophosphate Dodecahydrate; Phosphoric Acid, Trisodium Salt, Dodecahydrate; Na3PO4.12H2O; TSP-12 Hydrate
EINECS	231-509-8

Quality Control

Our Sodium Phosphate Tribasic Dodecahydrate is manufactured under a stringent quality management system. Each batch is tested to ensure it meets relevant specifications for food (FCC), pharmaceutical (USP/EP), or technical grades. A comprehensive Certificate of Analysis (COA) documenting purity, assay, and impurity profiles is provided with every shipment to guarantee traceability and compliance.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at a controlled room temperature (15-25°C). This material is hygroscopic (moisture-sensitive) and must be kept in its original, moisture-proof packaging until use to prevent caking and degradation.

Specification

Item	Specification
Appearance	White or colorless crystals
Identification (IR)	Conforms
Assay (Na3PO4·12H2O)	≥ 98.0 %
pH (1% Solution)	11.5 - 12.5
Loss on Drying	55.0 - 58.0 %
Chloride (Cl)	≤ 0.01 %
Sulfate (SO4)	≤ 0.01 %
Heavy Metals (as Pb)	≤ 10 ppm

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