What is the reaction between industrial naphthalene and sulfuric acid? Is it harmful to human body?

Naphthalene sulfonic acid is prepared by sulfonation of naphthalene and sulfuric acid.

Health hazard: If inhaled, ingested or absorbed through the skin, it is harmful to the body. It has a strong stimulating effect on eyes, skin, mucosa and upper respiratory tract. Inhalation can cause inflammation, spasm, edema and pulmonary edema of larynx and bronchus. Symptoms of poisoning may include burning sensation, cough, wheezing, shortness of breath, headache, nausea and vomiting. It can also cause skin allergic reactions.

Environmental hazard: it is harmful to the environment and can pollute water and atmosphere.

Danger of explosion: This product is flammable, toxic and strongly irritating.