Main physical and chemical hazards: flammable and explosive gas, easy to burn and explode. GHS Hazard categories: Flammable gas, Category 1 Pressurized gas acute toxicity - inhalation, Category 3* reproductive toxicity, Category 1A Specific target organ toxicity - Repeated exposure, Category 1
Warning word: Danger
Hazard information: highly flammable gas; Gas under pressure, if heated can explode; May impair fertility or the fetus; Long-term or repeated exposure can cause organ damage; Toxic by inhalation;
Precautions: Keep away from heat sources, sparks, open flames and hot surfaces. Work with tools that do not produce sparks. Keep container airtight. Take ESD measures. Ground and connect containers or devices. Use explosion-proof appliances, ventilation, lighting and other equipment. Use personal protective equipment and wear antistatic work clothes as required. No smoking, eating and drinking in the workplace. Avoid high concentration inhalation. Light loading and unloading during handling to prevent cylinder and accessories damage.
Route of invasion: inhalation.
Health hazard: Carbon monoxide binds to hemoglobin in the blood and causes tissue deficiency. Acute poisoning: mild poisoning of headache, dizziness, tinnitus, palpitation, nausea, vomiting, weakness, blood carboxyhemoglobin concentration can be higher than 10%; In addition to the above symptoms, moderate intoxicant patients also have cerulean skin and mucous membranes, rapid pulse, irritability, gait instability, light to moderate coma, and blood carboxyhemoglobin concentration can be higher than 30%; severe patients have deep coma, constricted pupils, enhanced muscle tone, frequent convulsions, urinary and bowel incontinence, shock, pulmonary edema, and severe myocardial damage, and blood carboxyhemoglobin can be higher than 50%. After some patients recover from coma, about 2-60 days after the symptom remission period, there may be delayed encephalopathy, mainly with mental disorders of consciousness, cone system or extrapyramidal system damage. Chronic effects: Whether it can cause chronic intoxication and cardiovascular effects is uncertain.
Emergency summary: such as leakage: quickly evacuate the contaminated area to the upper wind, and isolation, strictly restrict access. Cut off the fire. Emergency personnel are advised to wear self-contained positive pressure breathing apparatus and fire protective clothing. Cut off the source of leakage as much as possible. Reasonable ventilation to accelerate diffusion. Dilute and dissolve in spray water. Build embankments or dig pits to contain large amounts of waste water. If possible, send the leaking gas to the open area with the exhaust fan or install the appropriate nozzle to burn off. 

If the leaking gas catches fire: Do not extinguish the fire unless the source of the leak can be safely cut off. If there is no danger, eliminate all sources of ignition. In case of fire, spray water to cool the container and move it from the fire to an open area if possible. In case of fire, fog water, foam, carbon dioxide, dry powder extinguishing agent is used to extinguish the fire. 

If inhaled: quickly remove from the scene to fresh air. Keep your airway clear. If breathing is difficult, give transfusion. If breathing stops, give artificial respiration immediately. 

Seek medical attention.
Environmental hazard: It is harmful to the environment and can cause pollution to water, soil and atmosphere.