Self-brewed methanol disappeared after several years.

Self-brewed methanol will not disappear because of long storage time.

Methanol is generally produced in the brewing process due to fermentation, bad koji or raw materials. If better brewing equipment is used, methanol can be directly removed during distillation, so that the produced liquor will not have the problem of methanol exceeding the standard. Professional brewing equipment can do this. However, in the process of operation, we must pay attention to reasonable operation to ensure standardized operation and thorough sterilization. Sterilization should be done well in the brewing process first. Every key link of the utensils and containers used should be sterilized, so as not to leave an opportunity for harmful bacteria.

Methanol (CH3OH) is a saturated monohydric alcohol with the simplest structure. It is also called "lignin alcohol" or "lignin" because it was first discovered in dry distillation wood. Methanol is a colorless and volatile liquid with an alcohol smell. The finished product is usually made by the reaction of carbon monoxide and hydrogen, which can be used to make formaldehyde and pesticides, and can also be used as an extractant of organic substances and a denaturant of alcohol. The lowest dose of human oral poisoning is about 100mg/kg body weight, and 0.3 ~ 1 g/kg can cause death.