What harm does long-term exposure to NMP do to people

NMP here refers to N-methylpyrrolidone. N-methylpyrrolidone is a colorless or light yellow transparent, oily liquid with a slight smell of ammonia. Its toxicity is small, but long-term exposure may cause certain damage to skin and mucous membrane, respiratory tract, eyes, etc.

1. Skin and mucous membrane: N-methylpyrrolidone has certain irritation. If the concentration is too high, long-term direct contact with the skin may cause symptoms such as redness, itching, peeling, blisters, and allergic dermatitis, urticaria, and so on;

2. Respiratory tract: N-methylpyrrolidone has a slight odor of ammonia. Excessive inhalation is also irritant to the respiratory tract. Long-term inhalation may cause cough, expectoration, dry throat and other symptoms, and even cause chronic pharyngitis, bronchitis and other diseases. If patients with respiratory diseases are exposed for a long time, it may lead to aggravation of the disease and affect the prognosis of the disease;

3. Eyes: If N-methylpyrrolidone is accidentally dropped into the eyes, it may cause eyelid edema, dry eyes, itchy eyes, tears, conjunctival congestion and other symptoms;

4. Other hazards: prolonged exposure to N-methylpyrrolidone may also lead to chronic poisoning, fatigue, dizziness, headache and other symptoms, and damage liver and kidney functions.