what are the safety precautions in the laboratory?

Chemical reagents are full of danger at any time in the experiment, so we need to pay special attention

in chemical experiments, a variety of chemicals and instruments, as well as water, electricity and gas, are often used, and experimental conditions and instruments with high temperature, low temperature, high pressure, vacuum, high voltage, high frequency and radiation source are often encountered. 1f lack of necessary knowledge of safety protection, it will cause great loss of life and property. Therefore, it is very important to carry out safety protection education for chemical laboratory staff, which must arouse the attention of all staff

hazardous chemicals

1. Flammable reagents

when handling flammable reagents, it is necessary to strictly check whether there is open fire nearby. The following commonly used organic solvents are highly flammable:

hydrocarbons such as hexane, light petroleum (petroleum ether), benzene and toluene; Alcohols such as methanol, ethanol; Esters such as ethyl acetate; Ketones such as acetone; Ether compounds can produce explosive peroxides when exposed to air or light. Therefore, special attention should be paid when using. Ether and tetrahydrofuran are commonly used as ethers, which should be handled with special care

in addition, ether also has a very low boiling point and a certain degree of anesthesia, carbon disulfide has a high flammability, and even water bath heating will cause it to catch fire, so it should be avoided in the experiment