Harmful The flux isopropanol hazardous as follows: exposure to high concentrations of steam, headache, drowsiness, ataxia, and eye, nose and throat irritation. Oral can cause nausea, vomiting, abdominal pain, diarrhea, drowsiness, coma and even death. Long-term contact with the skin can cause dry skin, chapped. Plant health standards around 400ppm carbon dioxide almost 350ppm about chemical use areas local exhaust system, or workshop is well ventilated, and generally do not cause harm to humans. Paste, heating will be tin dioxide flue gas generated at the same time the rosin dissolved in the solder paste will be released, the tin stove requires the installation of local exhaust ventilation. Plant every year we need to do to detect, detection the tin stove next to the smoke lead and tin dioxide concentration, generally do not exceed the state standards. There are a lot of flux, the ingredients inside of the same general have rosin and alcohols are advised to avoid inhalation and ingestion. If what protective measures are not, the factory's environmental, safety and work to do, very bad, at least it should do the job in a well-ventilated environment. Should provide protective equipment, such as chemical protective gloves and activated carbon masks. Operatives, we must learn to protect themselves, to develop good personal hygiene habits, be sure to do the operation can not eat and drink plenty of water / before meals need washing hands.