o purchase highly toxic chemicals, one should hold the "Hazardous Chemical Safety Production Permit" issued by the work safety supervision and management department, or the "Hazardous Chemical Business License" issued by the work safety supervision and management department of the people's government at the level of a districted city or the Hazardous Chemicals Safe Use Permit, or the Highly Toxic Chemicals Purchase Permit issued by the public security organ of the people's government at the county level.

To purchase hazardous chemicals that are prone to explosives, you should hold the "Hazardous Chemical Safety Production Permit" issued by the safety production supervision and management department, or the "Civil Explosives Production Permit" issued by the Ministry of Industry and Information Technology, or the city with districts. The "Hazardous Chemical Business Permit" or "Hazardous Chemical Safety Use Permit" issued by the safety production supervision and management department of the people's government, or the legal use certificate issued by the unit.