Description

Zinc Phosphate Tetrahydrate is an inorganic salt widely recognized for its role as a corrosion-inhibiting pigment. This compound, with the CAS registry number 7543-51-3, is essential for formulating protective coatings that extend the service life of metal substrates. It is a critical raw material for manufacturers in the industrial coatings, anticorrosive primers, and specialty chemical sectors seeking reliable, non-toxic alternatives to chromate-based inhibitors.

Application

• Anticorrosive Primers: The primary application is as an active pigment in zinc-rich and epoxy primers for steel structures, automotive parts, and marine equipment.
• Industrial Coatings: Used in heavy-duty protective coatings for bridges, pipelines, storage tanks, and offshore platforms.
• Dental Cements: Serves as a key component in zinc phosphate dental cements for permanent luting and restorative procedures.
• Fire Retardant Synergist: Acts as a synergist in flame-retardant formulations for polymers and textiles.
• Nutrient Supplement: Employed as a source of zinc and phosphorus in specialized animal feed and fertilizer blends.
• Ceramic Glazes: Functions as a opacifier and fluxing agent in the production of certain ceramic glazes and glass.

Basic Information

Product Name	Zinc Phosphate Tetrahydrate
CAS No.	7543-51-3
Molecular Formula	Zn3(PO4)2·4H2O
Molecular Weight	458.17 g/mol
Synonyms	Trizinc diphosphate tetrahydrate; Zinc orthophosphate tetrahydrate; Phosphoric acid, zinc salt (2:3), tetrahydrate; Zinc phosphate (Zn3(PO4)2) tetrahydrate; Hopeite; Anticorrosive pigment ZPO; ZPT; Zinc hydrogen phosphate tetrahydrate
EINECS	231-944-3

Quality Control

Our Zinc Phosphate Tetrahydrate is manufactured under a strict quality management system. Each batch undergoes comprehensive analysis to ensure it meets precise chemical and physical specifications, including assay, heavy metal limits, and particle size distribution. Certificates of Analysis (COA) documenting purity and compliance are available for all shipments.

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 nature, the container must be kept tightly sealed to prevent moisture absorption and caking. Keep away from incompatible materials such as strong acids.

Specification

Item	Specification
Appearance	White crystalline powder
Identification (IR)	Conforms
Assay (as Zn3(PO4)2·4H2O)	≥ 98.0 %
Loss on Drying	13.0 - 16.0 %
Lead (Pb)	≤ 20 ppm
Cadmium (Cd)	≤ 10 ppm
Particle Size (D50)	Contact for details
Oil Absorption	Contact for details

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