Carbon oxysulfide (COS) is a colorless, foul smelling gas commonly used as a chemical reagent or intermediate in industrial production. The toxicity of carbon disulfide is similar to that of carbon monoxide, as it can also bind with hemoglobin to form carboxyhemoglobin, thereby hindering the transport of oxygen. Carbon oxysulfide is slightly less toxic than carbon monoxide, but it is still a dangerous and toxic gas.

The duration of carbon monoxide poisoning depends on various factors, including the concentration and duration of exposure, as well as individual sensitivity. Generally speaking, high concentrations of carbon oxysulfide can cause poisoning in a short period of time, while long-term exposure to low concentrations may also trigger symptoms of poisoning.

In a high concentration of carbon oxysulfide environment, even brief contact can lead to poisoning. For example, in a confined space, if the concentration of carbon disulfide reaches a certain level, exposure within a few minutes may lead to the onset of toxic symptoms such as headache, dizziness, vomiting, and difficulty breathing.

If working or living in a low concentration of carbon oxysulfide environment for a long time, the symptoms of poisoning may gradually appear after several hours or days. In this case, the process of poisoning is relatively slow, but it can still pose a serious threat to health.

Once suspected of carbon monoxide poisoning, the victim should be immediately moved to fresh air and seek medical assistance. Treatment usually includes oxygen inhalation and monitoring of vital signs. In some cases, hyperbaric oxygen therapy may be necessary to accelerate the breakdown of carboxyhemoglobin.

The exact time of carbon monoxide poisoning cannot be given as it depends on multiple variables. However, it is certain that both short-term exposure to high concentrations and long-term exposure to low concentrations can lead to poisoning. Therefore, the best way to prevent carbon monoxide poisoning is to avoid unnecessary contact, especially in the working environment, and appropriate safety measures should be taken, such as wearing protective equipment and maintaining good ventilation. If contact unfortunately occurs, emergency measures should be taken immediately and professional medical assistance should be sought.