WSP-1 is widely used in polymer synthesis as a water-soluble initiator for radical polymerization reactions. It enables controlled initiation in aqueous environments, making it ideal for producing dispersible polymers and latex formulations. Its high solubility and consistent decomposition rate support uniform molecular weight distribution in synthesized polymers. It is commonly applied in the manufacture of specialty coatings, adhesives, and hydrogels where precise reaction control and clean decomposition by-products are required. Additionally, WSP-1 is favored in biomedical polymer applications due to its low toxicity and compatibility with sensitive systems.