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Product Name: Mequindox
Chemical Formula: C10H8N2O3
Synonyms: 3-Methyl-2-quinoxalinecarboxylic acid 1,4-dioxide
CAS Number: 1018-17-9
Intended Use: Veterinary Antibacterial Agent
Manufacturer Info: Contact information available upon request to suppliers.
Emergency Phone: Refer to local Poison Control Center or Emergency Information Service.
Classification: Acute toxicity (oral), Category 3; Toxic to reproductive health, Category 2
Hazard Statements: Harmful if swallowed; Causes serious eye irritation; Suspected of damaging fertility or the unborn child
Signal Word: DANGER
Precautionary Statements: Avoid breathing dust/mist; Wash hands thoroughly after handling; Wear eye protection, protective clothing, and gloves; Do not eat, drink, or smoke when using this product
Physical Hazards: Combustible dust; Generates hazardous gases on contact with acids
Health Hazards: May damage organs through prolonged or repeated exposure; Possible carcinogenic hazard
Environmental Hazards: Toxic to aquatic life with long lasting effects.
Chemical Identity: Mequindox
Percentage: ≥98% (Pure substance)
Impurities: Trace levels of quinoxaline derivatives
Additives: None present in technical grade material.
General Advice: Remove contaminated clothing and wash skin with soap and water;
Eye Contact: Rinse cautiously with water for several minutes; Remove contact lenses if present and easy;
Inhalation: Move victim into fresh air, keep at rest in a position comfortable for breathing; Seek medical attention if respiratory irritation or distress occurs;
Ingestion: Rinse mouth, do not induce vomiting; Give water if conscious; Seek immediate medical advice;
Skin Exposure: Wash with plenty of water and soap; Seek medical advice if irritation persists;
Note to Physician: Symptoms may be delayed; Treat according to symptoms.
Suitable Extinguishing Media: Water spray, dry chemical, foam, carbon dioxide;
Unsuitable Media: Strong water jets may spread powder;
Special Hazards: Thermal decomposition may emit oxides of nitrogen and carbon monoxide;
Protective Equipment: Firefighters wear self-contained breathing apparatus and protective suit;
Precautions: Isolate area; Prevent runoff from firefighting from entering waterways.
Personal Precautions: Wear protective equipment, including gloves and goggles, avoid inhaling dust;
Environmental Precautions: Prevent further leakage or spillage; Avoid discharge into drains, surface and groundwater;
Methods for Cleaning Up: Sweep up and shovel into suitable containers, minimize dust generation, ventilate affected area, wash spill site after material pickup is complete.
Handling: Avoid direct contact with the material, minimize dust formation, use appropriate exhaust ventilation;
Hygiene Measures: Wash thoroughly after handling, do not eat or drink during handling, keep away from food and beverages;
Storage Conditions: Store in a tightly closed container in a dry, cool, well-ventilated area, protect from light and moisture, keep away from incompatible materials such as strong oxidizing agents and acids;
Incompatibilities: Strong acids, bases, and oxidizers.
Occupational Exposure Limit: No established limit for Mequindox, minimize exposure as much as possible;
Engineering Controls: Use process enclosures, local exhaust ventilation, or other engineering controls;
Personal Protection: Safety glasses with side-shields, nitrile gloves, protective clothing, and dust mask or respirator if dust exposure risk is high;
Environmental Exposure Controls: Prevent material from entering drains or water courses.
Appearance: Yellow to orange crystalline powder;
Odor: Odorless or slight characteristic odor;
pH (in solution): 6.0–8.0;
Melting Point: 308°C (decomposition);
Boiling Point: Not applicable (decomposes before boiling);
Solubility: Sparingly soluble in water, soluble in hot ethanol;
Density: ~1.48 g/cm³;
Vapor Pressure: Negligible;
Partition Coefficient (log Pow): Data not available;
Flash Point: No data;
Auto-Ignition Temperature: No data.
Chemical Stability: Stable in original packaging when stored properly;
Reactivity: May react with strong oxidizers and acids;
Hazardous Decomposition: Nitrogen oxides, carbon monoxide, and other toxic fumes;
Polymerization: Will not occur;
Conditions to Avoid: Extreme moisture, heat, open flames, sources of ignition.
Routes of Exposure: Inhalation, ingestion, skin absorption;
Acute Toxicity: LD50 oral (rat): 120 mg/kg;
Skin Irritation: Moderate irritant;
Eye Damage/Irritation: Severe irritation possible;
Chronic Effects: Liver and kidney damage in repeated exposure studies, possible carcinogenicity (evidence in lab animals), mutagenicity reported in certain tests;
Reproductive Toxicity: Experimental evidence for harmful effects on reproduction;
Symptoms of Overexposure: Gastrointestinal discomfort, vomiting, headache, dizziness, possible central nervous system effects.
Ecotoxicity: Highly toxic to aquatic life, especially fish and aquatic invertebrates;
Persistence and Degradability: Practically non-biodegradable under environmental conditions;
Bioaccumulative Potential: Low potential due to low water solubility, but environmental persistence is significant;
Mobility in Soil: Strongly adsorbed in most soils, no significant leaching expected;
Other Adverse Effects: Accumulation in sediment may affect benthic organisms.
Disposal Methods: Incinerate in a chemical incinerator equipped with afterburner and scrubber; disposal must comply with local, regional, and national regulations;
Contaminated Packaging: Dispose of as unused product; clean all equipment and materials before decommissioning;
Avoid: Release to the environment, landfilling where leaching may occur.
UN Number: Not officially assigned (check latest dangerous goods regulations);
Transport Hazard Class: Not classified as dangerous for transport but may be subject to regulation as an environmentally hazardous substance;
Packing Group: As required for toxicity class;
Special Precautions: Protect packages against physical damage, moisture, and weather extremes;
Labels: Marks for toxic and aquatic hazards as necessary under local requirements.
International Inventories: Appears on some country-specific chemical inventories including China IECSC;
OSHA, TSCA, SARA Title III: Not specifically listed;
REACH Registration: Not available;
EU Classification: Toxic, Reproductive toxin category 2, Environmental hazard;
Other Regulations: Restrictions exist in many jurisdictions for use in food-producing animals due to toxicity concerns.
