Sulphonic acid is a strong acid used in various industrial processes, such as dye production, petroleum refining, and detergent manufacturing. The term "sulphonic acid" is often used interchangeably with "sulfonic acid," which is a common synonym. Other synonyms for sulphonic acid include sulfonic acid, sulfonate, and sulfuric acid. Sulfonic acid and sulfuric acid are both strong acids with similar chemical properties, but sulfuric acid is more commonly used in laboratory and industrial settings. Sulfonate is the conjugate base of a sulfonic acid and is used as an anionic surfactant in cleaning agents. Whatever the preferred term, sulphonic acid is a vital component in many industrial processes.