Sodium propynesulfonate

Sodium propynesulfonate (CAS 55947-46-1), also known as sodium 2-propyne-1-sulphonate, is a specialty sulfonate salt used primarily as a functional additive in electroplating and electrodeposition processes. Its terminal alkyne group enables surface-active and polymerization-relevant behavior that standard sulfonates cannot provide, making it a targeted choice for technically demanding formulations.

In the electronics and metal finishing industries, it functions as a brightening and leveling agent in copper electroplating baths, improving deposit uniformity across complex geometries. Formulators of plating electrolytes incorporate it to control grain structure and surface smoothness in printed circuit board manufacturing. This ensures high-quality finishes for sensitive components.

In polymer chemistry, the reactive alkyne group supports its use as a building block for sulfonate-functionalized polymers and surface-modification coatings for various industrial applications. Mining and metals processors may also evaluate it as a functional additive where controlled surface interaction during metal recovery or treatment is required for efficient processing.

Sodium propynesulfonate is supplied as a white to off-white crystalline powder or solid. It is available in technical grade, with purity specifications typically ranging from 97% to 99%+. Packaging options generally include small quantities for laboratory or formulation development through to bulk quantities for industrial electroplating operations and large-scale manufacturing.