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Methomyl
Methomyl
- CAS:
- 16752-77-5
- MF:
- C5H10N2O2S
- MW:
- 162.21
Properties
- 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℃
Safety Information
- Symbol(GHS)
GHS06,GHS09
- Signal word
- Danger
- Hazard statements
- H300-H410
- Precautionary statements
- P264-P270-P273-P301+P310-P391-P405
- Hazard Codes
- T+;N,N,T+,Xn,F,Xi
- Risk Statements
- 28-50/53-36-20/21/22-11-36/37/38
- Safety Statements
- 1/2-22-36/37-60-61-45-16-36-26-28
- RIDADR
- UN 2757
- OEB
- B
- OEL
- TWA: 2.5 mg/m3
- WGK Germany
- 3
- RTECS
- AK2975000
- HazardClass
- 6.1(a)
- PackingGroup
- II
- HS Code
- 29309090
- Toxicity
- LD50 orally in male rats: 17 mg/kg (Kaplan, Sherman)
Use
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. TGroundwater. 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).
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