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Chemical Name: Ethion
Common Use: People usually see ethion in agriculture, mostly for pest control on crops such as fruits, vegetables, and cotton.
Chemical Formula: C9H22O4P2S4
Description: This compound appears as a pale yellow to brown liquid, with a slight sulfur odor, and doesn’t mix well with water. Its oily feel and unique smell set it apart from some other pesticides in the shed. It often shows up in liquid concentrates or emulsifiable formulations for easier application in the field.
Hazard Class: Organophosphate pesticide, considered moderate to high in toxicity depending on level and route of exposure.
Acute Effects: Signs of poisoning include headache, sweating, nausea, cramps, and, in severe cases, difficulty breathing, convulsions, or paralysis. Skin contact causes irritation, and inhalation of vapors can lead to respiratory discomfort.
Environmental Hazard: Harmful to aquatic life, dangerous for birds and beneficial insects such as bees. Persistence in soil and water makes off-target movement a real worry after application.
Active Ingredient: Ethion approximately 95% or higher in pure technical grade; various emulsifiers or solvents added in commercial products.
CAS Number: 563-12-2
Other Components: Ingredients vary, some blends add aromatic solvents. Formulations stay proprietary, but the main concern focuses on the ethion content itself because that’s where the risk sits.
Skin Contact: Immediate washing with soap and plenty of water. Remove affected clothing and keep from reusing until thoroughly washed.
Eye Contact: Rinse cautiously with clean water for at least 15 minutes; keep eyelids open and avoid rubbing.
Inhalation: Move to fresh air quickly; loosen tight clothing and seek medical attention if symptoms persist.
Ingestion: Rinse mouth, don’t induce vomiting, and bring the exposed person to a healthcare facility right away. Keep the product container handy for reference.
Emergency Response: Rapid response saves lives—organophosphates like ethion interfere with key enzymes in the nervous system, so antidote treatment (usually atropine) might be required.
Suitable Extinguishing Media: Use dry chemical, carbon dioxide, water spray, or foam. Avoid high-pressure water jets that can spread contaminated material.
Special Hazards: Combustion lets off hazardous fumes including phosphorus oxides, sulfur oxides, and irritating smoke. Protective breathing gear is a must.
Protective Equipment: Structural firefighting gear and self-contained breathing apparatus go a long way. Runoff from fire control may contaminate water supplies.
Precautions: Fire near stockpiles can lead to environmental spill risks, so control runoff and keep neighbors informed if smoke drifts offsite.
Spill Response: Use absorbents like sand or earth; scoop up spilled material and place in suitable waste containers. Ventilate the area.
Personal Protection: Wear rubber gloves, chemical protective boots, goggles, and a mask or full-face respirator.
Containment: Prevent spills from entering drains, sewers, or water bodies; contaminated soil needs removal and safe disposal.
Cleanup: Thoroughly wash contaminated surfaces with detergent and water. Decontaminate cleaning tools and dispose of waste according to local regulations.
Storage: Keep containers tightly closed and store in cool, dry, well-ventilated areas. Store away from food, feed, and water supplies.
Handling: Avoid breathing vapors, avoid contact with skin, eyes, or clothing. Wear appropriate protective equipment and wash hands before meals or breaks.
Segregation: Separate from combustion sources and incompatible substances such as strong oxidizers or acids.
Precautionary Practices: Trained personnel should handle the material, and spill kits should be on hand wherever ethion lives on site.
Engineering Controls: Local exhaust ventilation and closed systems help keep levels in the air low.
Personal Protective Equipment: Gloves (nitrile), long-sleeved protective clothing, goggles or splash-proof safety glasses, and either a particulate filter or organic vapor respirator for applications with mist or vapor.
Exposure Limits: No U.S. OSHA established limits, but international standards recommend keeping the workplace as free of pesticide residue as possible.
Hygiene: Shower and change after work, launder clothing separately.
Appearance: Light to dark yellow or brownish oily liquid with a faint sulfur smell.
Boiling Point: Around 145 °C (at 0.7 mmHg)
Melting Point: Below room temperature, so the product remains liquid in most environments.
Solubility: Practically insoluble in water but mixes well with most organic solvents (acetone, benzene, alcohols).
Vapor Pressure: Low, limiting its volatility under most conditions.
Density: About 1.21 g/cm³ at 20 °C.
Stability: Stable under normal storage conditions, tends to break down faster under sunlight or heat.
Reactivity: Reacts with strong acids, bases, and oxidizing agents, leading to possible hazardous byproducts.
Decomposition Products: Produces toxic fumes such as phosphorous oxides and sulfur oxides when burned or decomposed under heat.
Storage Precautions: Prevent mixing with incompatible materials and keep tightly sealed to avoid unnecessary release.
Routes of Exposure: Absorbed by ingestion, skin, and inhalation. High-risk situations exist for agricultural workers and handlers during mixing, loading, or application.
Symptoms: Nausea, muscle twitching, pinpoint pupils, vomiting, sweating, weakness. Advanced poisoning triggers convulsions and respiratory depression.
Chronic Exposure: Long-term exposure comes with risk of neurological impacts. Studies link organophosphates to memory issues and increased anxiety levels.
Acute Toxicity: LD50 (oral, rat) typically falls in the range of 60–200 mg/kg, which means serious risk exists even at low doses.
Persistence: Ethion hangs around in the soil and can move with runoff, particularly after rainfall.
Toxicity: Aquatic organisms suffer, with even tiny concentrations leading to fish kills or impairment for amphibians and invertebrates. Bees and birds are vulnerable, so applications near habitats must be managed carefully.
Degradation: Slow in water—sunlight and heat break down ethion faster, but in cool, dark conditions, it tends to stick around. Soil microbes speed up the breakdown with the right temperature and moisture.
Disposal Method: Specific hazardous waste disposal sites best handle large quantities or contaminated equipment.
Packaging: Clean spent containers according to local pesticide container guidelines; never reuse for food or drink.
Environmental Risk: Dumping product or rinse water into drains, streams, or fields risks environmental harm and is strictly prohibited in most farming jurisdictions.
Worker Safety: Anyone involved in disposal needs proper breathing and skin protection.
Shipping: Carriage by road, rail, or ship classifies ethion as a hazardous material. Not suited for personal vehicles, and typical shipments require safety labels to warn of the contents and nature of the risk.
Packaging: Containers demand secure sealing and clear labeling to prevent leaks and accidental misuse. Safe transit demands drivers know emergency steps for spills and fires.
Spill Control: Emergency supplies on transport vehicles help contain leaks and keep small accidents from turning into environmental disasters.
Legal Restrictions: Pesticide regulations mandate withholding periods before harvesting treated crops, worker notification, and risk reduction steps to protect wildlife.
Limits and Bans: Many countries have reviewed or banned ethion due to its toxicity and environmental persistence. U.S. EPA phased out its use for many non-agricultural purposes.
Worker Protection: Application laws require record-keeping, user training, and protective equipment—no bypassing safeguards just for the sake of convenience.
Community Notification: Rights-to-know requirements keep neighbors and local authorities in the loop, especially in regions with sensitive water sources or high bee activity.
