How is 2-Amino-6-{[2-(sulfooxy)ethyl]sulfonyl}-1-naphthalenesulfonic acid (CAS: 81417-89-2) typically synthesized?

2-Amino-6-{[2-(sulfooxy)ethyl]sulfonyl}-1-naphthalenesulfonic acid (CAS: 81417-89-2) can be synthesized through a multi-step process involving the sulfonation of naphthalene, followed by the introduction of the sulfooxy and amino functionalities. This process typically uses sulfur trioxide and sulfuric acid as reagents, with appropriate catalysts and solvents to achieve high yields and selectivity. The detailed synthesis protocol can be found in the literature and is often used in academic and industrial settings for the production of this compound.