The main polymerization inhibitor in styrene is hydroquinone, which can be removed by vacuum distillation. First, wash 1-2 times with 10%NaOH, then wash with water until water is neutral, dry with anhydrous magnesium sulfate overnight, filter and distill under reduced pressure. Keep pumping with the water pump, and the temperature is about 68-70 degrees. Pure styrene is a colorless liquid, which will turn pale yellow after polymerization, and the viscosity of the liquid will increase, so it needs to be stored at low temperature. Health hazard: It can stimulate and anesthetize eyes and upper respiratory mucosa. Acute poisoning: at high concentration, it will immediately cause irritation to eyes and upper respiratory mucosa, resulting in eye pain, tears, runny nose, sneezing, sore throat and cough. , followed by headache, dizziness, nausea, vomiting, general weakness and so on. In severe cases, dizziness and stumbling gait may occur. When eyes are polluted by styrene liquid, it will cause burns. Chronic effects: Common neurasthenia syndrome, including headache, fatigue, nausea, loss of appetite, abdominal distension, depression, forgetfulness, trembling fingers, etc. Can stimulate the respiratory tract, and long-term contact sometimes causes obstructive pulmonary disease. Rough, chapped and thickened skin.

Environmental hazard: it is very harmful to the environment and can pollute water, soil and atmosphere.

Explosion hazard: this product is flammable, suspected carcinogen and irritating.