Anhydrous sodium sulphate, also known as Yuanming powder, is a fundamental inorganic chemical raw material widely used in detergent, glass manufacturing, textile dyeing, pulp and paper industries. Driven by refined development of downstream sectors, stricter standards are applied to purity, whiteness, particle size and impurity control. Different grades of anhydrous sodium sulphate are selected for specialized industrial scenarios.

The detergent sector remains a major consumption market. In powder detergent formulations, anhydrous sodium sulphate works as filler and anti-caking agent to improve powder flowability and stabilize surfactant systems. As detergent formulas upgrade, low-impurity grades are preferred for continuous automatic batching to avoid agglomeration.

The glass industry brings steady demand growth, especially for photovoltaic glass, flat glass and container glass. It acts as fining agent during melting to eliminate bubbles inside molten glass, improve transparency and reduce energy consumption. High-purity sodium sulphate minimizes defects such as spots and seeds, becoming an essential auxiliary material for solar glass production.

In textile dyeing, it serves as dyeing assistant to promote uniform dye absorption on cotton and synthetic fabrics and improve color fastness. Expanding printing and dyeing capacity in Southeast and South Asia increases demand for low-salt grades, supporting eco-friendly dyeing processes and lowering wastewater treatment burden. For pulp and paper production, it is applied in kraft pulping to assist wood digestion and maintain pulp strength and brightness.

Green production becomes a key trend. Two production routes coexist: natural mirabilite mining and industrial by-product recovery. Recycling and purification from chemical waste liquid and lithium extraction tail liquid mature gradually to boost resource efficiency and align with global circular economy targets.

Overseas buyers pay closer attention to test indicators, batch consistency and compliance documents, focusing on purity, chloride and heavy metal content. Products need to meet GB/T 6009, REACH and other regional specifications. The market evolves from simple bulk purchasing to customized graded products tailored for different manufacturing processes. High-quality anhydrous sodium sulphate keeps unlocking potential in traditional industries and new energy supporting sectors.