Legal analysis: Sulfuric acid is a toxic chemical and a drug-making substance. At present, there is no clear quantitative regulation on the crime of illegally storing toxic substances. As for the crime of illegally buying and selling drug-making substances, the judicial interpretation stipulates that those who illegally buy and sell ephedrine, pseudoephedrine, its salts and unilateral preparations should be placed on file, and those whose sulfuric acid amount is equivalent to the drug-making substances in the previous method should be placed on file. Sulfuric acid is a chemical precursor. If it is bought and sold without filing procedures, it is illegal and may face penalties such as fines and fixed-term imprisonment.

Legal basis: Criminal Procedure Law of People's Republic of China (PRC).

Article 19 Criminal cases shall be investigated by public security organs, except as otherwise provided by law. In the process of legal supervision of litigation activities, the people's procuratorate may file a case for investigation of illegal detention, extorting confessions by torture, illegal search and other criminal acts. Infringe on civil rights and undermine judicial justice. If a major criminal case of a functionary of a state organ under the jurisdiction of a public security organ needs to be directly accepted by a people's procuratorate, it may be placed on file for investigation upon the decision of a people's procuratorate at or above the provincial level. Cases of private prosecution are directly accepted by the people's courts.

Article 225 Whoever, in violation of State regulations, commits one of the following illegal business operations and disrupts the market order, if the circumstances are serious, shall be sentenced to fixed-term imprisonment of not more than five years or criminal detention, and shall also, or shall only, be fined not less than one time but not more than five times the illegal income; If the circumstances are especially serious, he shall be sentenced to fixed-term imprisonment of not less than five years, and shall also be fined not less than one time but not more than five times for illegal gains or confiscation of property:

(a) operating a franchise or monopoly commodity or other commodities whose operation is restricted by laws and administrative regulations without permission;

(2) buying and selling import and export licenses, import and export certificates of origin and other business licenses or approval documents stipulated by laws and administrative regulations;

(three) without the approval of the relevant competent departments of the state, illegally engaged in securities, futures, insurance business, or illegally engaged in fund payment and settlement business;

(four) other illegal business activities that seriously disrupt the market order.