ChemicalBook > CAS DataBase List > Methomyl

Methomyl

Methomyl Structure
Methomyl
  • CAS No.16752-77-5
  • Chemical Name:Methomyl
  • CBNumber:CB1259124
  • Molecular Formula:C5H10N2O2S
  • Formula Weight:162.21
  • MOL File:16752-77-5.mol
Methomyl Property
  • Melting point 78°C
  • Boiling point 144°C
  • Density d424 1.2946
  • vapor pressure 0Pa at 20℃
  • refractive index 1.6430 (estimate)
  • storage temp. 0-6°C
  • solubility Chloroform: Slightly Soluble,Methanol: Slightly Soluble
  • pka 13.27±0.46(Predicted)
  • form solid
  • Water Solubility Soluble. 5.8 g/100 mL
  • Merck 13,6012
  • BRN 3081564
  • Exposure limits NIOSH REL: TWA 2.5 mg/m3; ACGIH TLV: TWA 2.5 mg/m3.
  • Stability Stable. Incompatible with strong bases, strong oxidizing agents.
  • InChIKey UHXUZOCRWCRNSJ-QPJJXVBHSA-N
  • LogP 0.11 at 25.2℃
  • CAS DataBase Reference 16752-77-5(CAS DataBase Reference)
  • EWG's Food Scores 3
  • FDA UNII 1NQ08HN02S
  • NIST Chemistry Reference Methomyl(16752-77-5)
  • EPA Substance Registry System Methomyl (16752-77-5)
  • UNSPSC Code 41116107
  • NACRES NA.24
Safety
Hazard and Precautionary Statements (GHS)
  • Symbol(GHS)
  • Signal wordDanger
  • Hazard statements H300-H410
  • Precautionary statements P264-P270-P273-P301+P310-P391-P405

Methomyl Chemical Properties,Usage,Production

  • Description Acetamide acid (methomyl) is a carbamate broad-spectrum insecticide. Methomyl is classified as a restricted use pesticide (RUP). It is a crystalline solid with a slight sulphurous odour and very soluble in methanol, acetone, ethanol, and isopropanol. It decomposes with heat and releases hazardous gases/vapours, such as sulphur oxides, methyl isocyanate, and HCN. Acetamide acid (methomyl) is used both as a contact insecticide and as a systemic insecticide. It is used as an acaricide to control ticks and spiders; as fly bait; for foliar treatment of vegetable, fruit, field crops, cotton, and commercial ornamentals; and in and around poultry houses and dairies.
  • Chemical Properties Methomyl is a white crystalline solid with a slight sulfurous odor. A noncombustible solid, that may be dissolved in flammable liquids that may alter physical properties listed here.
  • Chemical Properties Acetamidic acid (methomyl) is carbamate broad-spectrum insecticide. Methomyl is clas- sifi ed as a restricted use pesticide (RUP). It is a crystalline solid with a slight sulfurous odor, very soluble in methanol, acetone, ethanol, and isopropanol. It decomposes with heat and releases hazardous gases/vapors, such as sulfur oxides, methylisocyanate, and HCN. Acetamidic acid (methomyl) is used both as a contact insecticide and as a systemic insecticide. It is used as an acaricide to control ticks, spiders, as fl y bait, for foliar treatment of vegetable, fruit and fi eld crops, cotton, commercial ornamentals, and in and around poultry houses and dairies.
  • Uses Insecticide.
  • Uses Insecticide, nematocide.
  • Uses Methomyl is a pesticide. This mixture of two stereoisomers is used as a foliar spary to control field crops, stables and poultry houses, and in glasshouses on ornamentals and vegetables, or in flypapers. Cases have been reported in chrysanthemum growers and in two women working in a plant nursery.
  • Definition ChEBI: A carbamate ester obtained by the formal condensation of methylcarbamic acid with the hydroxy group of 1-(methylsulfanyl)acetaldoxime.
  • General Description White crystalline solid with slight sulfurous smell. Used as a nematocide, and an insecticide on vegetables, tobacco, cotton, alfalfa, soy beans, and corn.
  • Air & Water Reactions Water soluble.
  • Reactivity Profile Methomyl is a carbamate ester. Carbamates are chemically similar to, but more reactive than amides. Like amides they form polymers such as polyurethane resins. Carbamates are incompatible with strong acids and bases, and especially incompatible with strong reducing agents such as hydrides. Flammable gaseous hydrogen is produced by the combination of active metals or nitrides with carbamates. Strongly oxidizing acids, peroxides, and hydroperoxides are incompatible with carbamates.
  • Hazard Toxic by ingestion. Acetyl cholinesterase inhibitor, male reproductive damage, and hematologic effects. Questionable carcinogen.
  • Health Hazard Acetamidic acid (methomyl) is potentially a highly poisonous material in humans. Exposures to acetamidic acid (methomyl) cause adverse health effects. It is highly toxic and causes inhibition of cholinesterase activity. The symptoms of toxicity include, but are not limited to, weakness, lack of appetite, blurred vision, pupillary constriction, cor- neal injury, headache, nausea, abdominal cramps, burning sensation, coughing, wheez- ing, laryngitis, shortness of breath, and vomiting. It may be harmful if absorbed through the skin of the mucous membranes and upper upper respiratory tract and cause chest discomfort, constriction of pupils, sweating, muscle tremors, and decreased pulse. After severe poisoning, occupational workers show symptoms of twitching, giddiness, confu- sion, muscle incoordination, heart irregularities, loss of refl exes, slurred speech, paralysis of the muscles of the respiratory system, and death. The target organs of methomyl toxic- ity include nerves, cardiovascular system, liver, and kidneys.
  • Health Hazard Extremely toxic by oral route; moderatelytoxic by inhalation; exhibits acute, delayed,and chronic effects; cholinesterase inhibitor;symptoms are those of phosphate — or carbamate esters — the major signs of whichare increased salivation, lacrimation, spontaneous urination, blurred vision, pinpointpupils, tremor, twitching of muscle and lossof coordination; confusion, convulsions, andcoma may occur as well; other signs ofpoisoning include nausea, vomiting, cramps,diarrhea, slow heart rate, shortness of breath,and pulmonary edema (U.S. EPA 1988);death may result from respiratory arrest(Gosselin et al. 1984); the probable lethaldose from ingestion in adult human could be0.5–2 g; oral lethal dose in dog 30 mg/kg,and monkey 40 mg/kg; toxic effects fromskin absorption low; listed as extremely hazardous substance by the U.S. EPA.
    LD50 oral (mouse): 10 mg/kg
    LD50 oral (rat): 17 mg/kg
    LD50 inhalation (rat): 77 ppm
    Tsai et al. (2003) have reported a caseof outbreak of food poisoning at a seafoodrestaurant in Taiwan. High levels of methomyl were found in leafy-vegetables stir-friedwith crab claws (380 ppm) and fried mussels (1113 ppm). The median latency frombeginning eating to first symptoms was5-minutes. The clinical symptoms were general weakness, ataxia, dizziness, vomiting,sweating, floating sensation, headache, dyspnea, and blurred vision..
  • Health Hazard Methomyl has high oral toxicity, moderate inhalation toxicity and low skin toxicity. The probable oral lethal dose for humans is between 7 drops and 1 teaspoon for a 150 pound adult. Death is due to respiratory arrest.
  • Fire Hazard When heated to decomposition, Methomyl emits very toxic fumes of nitrogen oxides and sulfur oxides. Do not subject liquid formulations to temperatures below 32F.
  • Flammability and Explosibility Not classified
  • Agricultural Uses Insecticide, Acaricide: Methomyl is a broad-spectrum insecticide that is particularly effective against organophosphorus-resistant pests. It is used as an acaricide to control ticks and spiders. It is used for foliar treatment of vegetable, fruit and field crops, tobacco, cotton, commercial ornamentals, and in and around poultry houses and dairies. It is also used as a fly bait. Methomyl is effective as a “contact insecticide,” because it kills target insects upon direct contact, and also as a “systemic insecticide” because of its capability to cause overall “systemic” poisoning in target insects, after it is absorbed and transported throughout the pests that feed on treated plants. It is capable of being absorbed by plants without being “phytotoxic” or harmful, to the plant. A U.S. EPA restricted Use Pesticide (RUP).
  • Trade name ACINATE®; AGRINATE®; CIMETLE®; DuPont TM 1179®; FRAM FLY KILL®; FLYTEK®; IMPROVED BLUE MALRIN SUGAR BAIT®; IMPROVED GOLDEN MALRIN BAIT®; INSECTICIDE 1179®; KIPSIN®; KUIK®; LANNATE®; LANNOX®; LANOX 90®; LANOX 216®; METHOMEX®; METHOMYL® 20SC; MEMILENE®; METHAVIN®; NU-BAIT II®; NUDRIN®; PILLARMATE®; RENTOKILL®; RENTOKIL FRAM FLY BAIT®; RIDECT®; SD 14999®; SOREX GOLDEN FLY BAIT®; WL 18236®
  • Contact allergens Methomyl is a pesticide agent, a carbamate insecticide with anticholinesterase activity. This mixture of two stereoisomers is used as a foliar spray to control field crops, in stables and poultry houses, and in glasshouses on ornamentals and vegetables, or in flypapers. Cases were reported in chrysanthemum growers and in two women working in a plant nursery
  • Safety Profile Poison by ingestion, inhalation, and subcutaneous routes. Mildly toxic by skin contact. Wen heated to decomposition it emits very toxic fumes of NOx and SOx.
  • Potential Exposure Methomyl is a broad-spectrum insecticide used as insecticide in many vegetables, field crops; certain fruit crops; and ornamentals.
    Incompatibilities: Keep away from strong bases, strong oxidizers. Heat causes decomposition forming toxic and irritating fumes including nitrogen oxides; sulfur oxides; hydrogen cyanide; methylisocyanate
  • First aid If this chemical gets into the eyes, remove any contact lenses at once and irrigate immediately for at least 15 min, occasionally lifting upper and lower lids. Seek medical attention immediately. If this chemical contacts the skin, remove contaminated clothing and wash immediately with soap and water. Seek medical attention immediately. If this chemical has been inhaled, remove from exposure, begin rescue breathing (using universal precautions, including resuscitation mask) if breathing has stopped and CPR if heart action has stopped. Transfer promptly to a medical facility. When this chemical has been swallowed, get medical attention. Give large quantities of water and induce vomiting. Do not make an unconscious person vomit. Methomyl 1731 Medical observation is recommended for 2448 h after breathing overexposure, as pulmonary edema may be delayed. As first aid for pulmonary edema, a doctor or authorized paramedic may consider administering a corticosteroid spray.
  • Environmental Fate Biological. From the first-order biotic and abiotic rate constants of methomyl in estuarine water and sediment/water systems, the estimated biodegradation half-lives were 75–165 and 39–134 days, respectively (Walker et al., 1988).
    Soil. Harvey and Pease (1973) reported that methomyl dissipated rapidly in fine sand and loamy sand soils. One month following application to a Delaware soil, 1.8% of the applied dosage was recovered and after 1 year, methomyl was not detected. T
    Groundwater. According to the U.S. EPA (1986) methomyl has a high potential to leach to groundwater.
    Plant. The reported half-lives of methomyl on cotton plants, mint plants and Bermuda grass were 0.4–8.5, 0.8–1.2 and 2.5 days, respectively (Willis and McDowell, 1987).
    Chemical/Physical. Emits toxic fumes of nitrogen and sulfur oxides when heated to decomposition (Sax and Lewis, 1987; Lewis, 1990).
  • storage Acetamidic acid (methomyl) should be kept stored in a sealed container in a cool (below 0 ° C), dry, area with adequate ventilation. The chemical should be kept away from incompatible chemical substances, strong oxidizing agents, strong bases, other pesticides, and food or feed.
  • Shipping UN2757 Carbamate pesticides, solid, toxic, Hazard Class: 6.1; Labels: 6.1-Poisonous materials. UN2811 Toxic solids, organic, n.o.s., Hazard Class: 6.1; Labels: 6.1-Poisonous materials, Technical Name Required
  • Incompatibilities Keep away from strong bases, strong oxidizers. Heat causes decomposition forming toxic and irritating fumes including nitrogen oxides, sulfur oxides, hydrogen cyanide, methylisocyanate.
  • Waste Disposal Consult with environmental regulatory agencies for guidance on acceptable disposal practices. Generators of waste containing this contaminant (≥100 kg/mo) must conform to EPA regulations governing storage, transportation, treatment, and waste disposal. Alkaline hydrolysis leads to complete degradation to nontoxic products. May be dissolved in water and sprayed into a furnace with effluent gas scrubbing also. In accordance with 40CFR165, follow recommendations for the disposal of pesticides and pesticide containers. Must be disposed properly by following package label directions or by contacting your local or federal environmental control agency, or by contacting your regional EPA office.
  • Precautions Occupational workers should avoid contact of acetamidic acid (methomyl) with the skin, eyes, or clothing, and avoid exposures to vapor or mist. Workers should be careful when storing and/or disposing of acetamidic acid, avoid the dust contaminating water, food, or feed by storage or disposal. Workers should use respiratory protection: Government approved respirator. Hand Protection: Compatible chemical-resistant gloves. Eye Protection: Chemical safety goggles.chemical safety goggles.
Methomyl Preparation Products And Raw materials
Raw materials
Preparation Products
Methomyl Suppliers
Global(0)Suppliers
Methomyl Spectrum
16752-77-5, MethomylRelated Search:
  • Endocrine Disruptors (Draft)Alphabetic
  • Pesticides
  • META - METH
  • M
  • Insecticides
  • H-MAlphabetic
  • EPA
  • Endocrine Disruptors (Draft)Pesticides&Metabolites
  • CarbamatesMethod Specific
  • Alpha sort
  • INSECTICIDE
  • 高端化学
  • 化工
  • 农业杀菌剂原料
  • 农药 广谱、速效杀虫剂
  • 杀虫剂
  • 有机氮杀虫剂
  • 杀虫（螨）剂
  • 农药
  • 杀虫剂原料
  • 有机氯杀虫剂
  • 农残、兽药及化肥类
  • 除草剂
  • 农药原料
  • 乙腈中灭多威溶液标准品
  • 大米中灭多威分析质控样品
  • 灭多威METHOMYL
  • 灭多威 SP(20%、40%90%)
  • 乙酸乙酯中杀线威
  • 涕灭威砜/含干冰运输费
  • 灭多威检测标准品
  • 甲萘威(西维因)-D7同位素
  • 甲醇中甲硫威砜
  • 甲醇中丁酮威亚砜
  • 甲醇中丙硫克百威
  • 丙酮中灭多威
  • 丙硫克百威/含干冰运输费
  • 甲梅基
  • 甲醇中灭多威溶液标准物质
  • 甲醇中未标记的灭多威100 UG / ML
  • 甲醇中的灭多威(97%CP)100 UG / ML(乙酰氧基草酸13C2,99%
  • 甲醇中灭多威溶液, 1000ΜG/ML
  • 乙腈中灭多威溶液,100ΜG/ML
  • 1-(甲硫基)亚乙基氨甲基氨基甲酸酯(含量>30%)
  • 甲醇中灭多威标准品
  • 丙酮中灭多威溶液标准物质
  • 甲苯中灭多威标准品
  • 甲苯中灭多威
  • 厂家直供|灭多威16752-77-5|含量98%|优质|直销
  • 厂家供应|可批发|灭多威16752-77-5|含量98%|农药级
  • 灭多威16752-77-5|含量98%灭多威
  • 灭多威16752-77-5|含量98%|农药级|厂家供应|批发直销
  • 优质||灭多威16752-77-5|含量98%|直销
  • 优质|灭多威16752-77-5|含量98%|农药级
  • 灭多威农药级|灭多威16752-77-5
  • 灭多威16752-77-5|含量98%|农药级
  • 灭多威16752-77-5|农药级98%|批发|直销
  • 灭多威16752-77-5|农药级

Home

My