Generally speaking, there are three main types of hazards that hands are prone to encounter in chemical laboratories:
1. Chemical substances and medicaments that are irritating to the skin are easy to cause damage to the hands when they are opened and used. Such as strong acid, strong alkali fall on the skin will produce burns, and there is a strong pain. Contact with hydrofluoric acid gas can cause itchy skin, pain, eczema and various dermatitis. Petroleum hydrocarbons such as gasoline are fat-soluble and irritating to the skin, making the skin dry and cracked, and some people will have erythema and blisters.

2. High temperature objects will cause burns to the hands when taking them.
3. When assembling or disassembling the glass instrument device, the damage will cause cuts to the hands.
According to the material and production process of the gloves, the gloves are divided into grades A, B and C, and grade A is the best quality gloves. Before packing and packing, it must pass 100% air leakage inspection, and gloves with needle holes will be rejected. According to the classification, the needle eye rate of grade A gloves is the lowest, and the needle eye rate of grade B and C grades increases in turn, and the safety factor during use is lower, which brings potential safety hazards to experimental users.