There are no mandatory flow regulation requirements for laughing gas. Laughing gas is not listed as a drug.
While nitrous oxide (laughing gas) was listed on the Catalog of Hazardous Chemicals in 2015, it is not classified as a highly toxic or flammable or explosive substance, so there are no mandatory flow-through regulatory requirements for its production, distribution and end-use.
The 2013 Catalog of Essential Drugs and the 2015 Supplementary Catalog of Non-Medicinal Essential Drugs determine which substances are regulated as drugs in China. Laughing gas is currently not on either of them and is not listed as a drug. For police, it is very difficult to enforce the law when laughing gas is marketed as a food additive.
According to the criminal law, drugs are opium, heroin, methamphetamine (meth), morphine, marijuana, cocaine and other narcotic drugs and psychotropic substances controlled by the state that are capable of causing addiction. "Laughing gas" is neither a drug listed in the article, nor in the "narcotic drugs varieties catalog" and "psychotropic drugs varieties catalog".
Expanded Information:
Toxicity of Laughing Gas:
Nitrous Oxide has been used as an inhalation anesthetic in medicine for a long time, and now it is rarely used. Inhalation of a mixture of nitrous oxide and air can lead to asphyxiation when the oxygen concentration is very low; inhalation of an 80% mixture of nitrous oxide and oxygen leads to deep anesthesia, and there are generally no after-effects upon awakening.
Nitrous oxide, commonly known as "laughing gas," is an anesthetic gas that was once widely used in medical procedures. However, when it enters the bloodstream, it can cause a lack of oxygen in the body, and long-term inhalation may cause high blood pressure, fainting, and even heart attacks. In addition, long-term exposure to such gases can also cause anemia and central nervous system damage.
The preservation of laughing gas:
Management of the operation: closed operation, provide good natural ventilation conditions. Operators must be specially trained and strictly abide by the operating procedures. Keep away from fire and heat sources, and smoking is strictly prohibited in the workplace. Keep away from flammable and combustible materials. Prevent gas leakage into the workplace air. Avoid contact with reducing agents. Load and unload gently when handling to prevent the cylinder and accessories from breaking. Equipped with appropriate varieties and quantities of fire-fighting equipment and leakage emergency treatment equipment.
Management of storage: Store in a cool and ventilated warehouse. Keep away from fire and heat source. Storage temperature should not exceed 30 ℃. Should be stored separately with flammable (combustible) substances, reducing agents, do not mix storage. The storage area should be equipped with leakage emergency treatment equipment.
Baidu Encyclopedia - Catalog of Hazardous Chemicals