Contact with hazardous chemicals without protective clothing is extremely dangerous and almost impossible to effectively prevent adverse reactions. It is strongly not recommended. However, if you have to contact with hazardous chemicals in certain extreme cases and do not have protective clothing, you can take the following measures to minimize the risk, but these measures are far from replacing protective clothing: 1. **Fully understand the characteristics of chemicals** - **Read the safety data sheet (SDS)**: Learn in detail about the composition, hazards, health hazards, first aid measures and other information of hazardous chemicals. For example, if you know that a chemical is corrosive to the skin, you can be extra careful to avoid skin contact. - **Consult professionals**: Consult experts, technicians or suppliers who are familiar with the chemical to understand the potential risks and prevention methods. 2. **Wear appropriate personal protective equipment** - **Chemical protective gloves**: Choose gloves that are resistant to chemical corrosion, such as nitrile gloves, neoprene gloves, etc., and ensure that the gloves are not damaged and compatible with the chemicals you are in contact with. - **Goggles**: Wear splash goggles or full-face masks to prevent chemicals from splashing into your eyes. - **Respiratory protective equipment**: If toxic gases or dust may be generated, wear appropriate masks, gas masks or air respirators. 3. **Take engineering control measures** - **Isolate operations**: Try to operate hazardous chemicals in a well-ventilated separate area or fume hood to effectively isolate chemicals from operators and reduce exposure opportunities. - **Local ventilation**: Set up local ventilation devices at the operation point to promptly exhaust harmful gases and dust that may be generated. 4. **Operate carefully** - **Add and mix slowly**: Avoid splashing or spilling due to violent reactions of chemicals. For example, slowly add acid to water, not the other way around. - **Control dosage**: Only take the minimum amount of chemicals required to complete the task to reduce exposure risks. 5. **Keep clean and rinse promptly** - **Clean promptly after operation**: Remove chemicals that may be contaminated on the skin as soon as possible, rinse with mild detergent and plenty of water. - **Wash hands regularly**: Wash hands in a timely manner during operation to avoid prolonged contact of chemicals with the skin. 6. **Conduct medical monitoring** - **Regular physical examinations**: Conduct regular occupational health examinations and monitor physical conditions to detect potential health problems early and treat them in time. - **Self-observation**: Pay close attention to your own physical reactions. If any discomfort occurs, stop contact immediately and seek medical help.