PHOSDRIN 500 SL

SECTION 2: Hazards identification

Toxicity class: WHO Ia; EPA I ADI: 0.0015 mg/kg MEVINPHOS (PHOSDRIN® 500 SL) IS A SEVERE CHOLINESTERASE INHIBITOR. A PHYSICIAN SHOULD BE CONTACTED IN ALL CASES OF EXPOSURE TO MEVINPHOS AND ITS FORMULATIONS. WEAR PROTECTIVE EQUIPMENT WHEN TREATING SOMEONE EXPOSED TO MEVINPHOS TO PREVENT EXPOSURE OF THE RESCUER. IT IS HIGHLY TOXIC. CONTACT WITH SKIN, INHALATION OF SPRAY, OR SWALLOWING MAY BE FATAL. Ingestion: Highly toxic by ingestion. Inhalation: Highly toxic by inhalation depends on volatility of compound. Skin contact: Highly toxic, due to possible absorption. Moderate irritating to skin. Eye contact: Highly toxic. Severe irritating to eyes. Fire and explosion hazard: Product is non flammable.

Principle Routes of Exposure

This product may produce acute cholinesterase depression if it is ingested, inhaled, or absorbed through the eyes or the skin. Extreme acute cholinesterase depression may be fatal. SIGNS OF ACUTE OVEREXPOSURE: Acute cholinesterase depression may be evidenced by headache, nausea, vomiting, diarrhoea, abdominal cramps, excessive sweating, salivation and tearing, constricted pupils, blurred vision, tightness in chest, weakness, muscle twitching and confusion; in extreme cases, unconsciousness, convulsions, severe respiratory depression and death may occur. In addition, exposure to the solvent may cause severe eye irritation. SIGNS OF CHRONIC OVEREXPOSURE: Repeated exposures to small doses of Mevinphos and other organophosphates may lower the cholinesterase to levels where the above symptoms of acute overexposure are observed. 4. FIRST AID MEASURES AND PRECAUTIONS Symptoms of exposure to the product include: nausea, headache, tiredness, giddiness, faintness, fatigue, and tightness of the chest, anxiety, blurred vision, pupillary constriction and muscle twitching. Depending on severity of poisoning these symptoms become worse with the onset of vomiting, abdominal pain, diarrhoea, sweating and salivation. Confusion, ataxia, slurred speech, loss of reflexes are some of the central nervous system effects that may lead to misdiagnosis of acute alcoholism. In extreme cases unconsciousness, convulsions, severe respiratory depression and death may occur.