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倍硫磷

倍硫磷
IUPAC名
Dimethoxy-[3-methyl-4-(methylthio)phenoxy]-thioxophosphorane
英文名 Fenthion
别名 百治屠;蕃硫磷
识别
CAS号 55-38-9  ☒N
PubChem 3346
SMILES
 
  • CC1=C(C=CC(=C1)OP(=S)(OC)OC)SC
性质
化学式 C10H15O3PS2
摩尔质量 278.33 g·mol⁻¹
外观 无色油状液体
密度 1.250 g/cm3 (20 °C / 4 °C)
熔点 7 °C
沸点 87 °C (0.01 mmHg)
溶解性 54~56 mg/L (20 °C)
蒸气压 4 × 10-5 mmHg (20 °C)
折光度n
D
1.5698 (20°C)
危险性
欧盟危险性符号
有毒有毒 T
危害环境危害环境N
警示术语 R:R21/22, R23, R48/25, R68, R50/53
安全术语 S:S1/2, S36/37, S45, S60, S61
致死量或浓度:
LD50中位剂量
• 雄性大鼠急性经口:
215 mg/kg

• 雌性大鼠急性经口:
245 mg/kg

• 大鼠急性经皮:
330~500 mg/kg
若非注明,所有数据均出自标准状态(25 ℃,100 kPa)下。

倍硫磷(英语:Fenthion),学名O,O-二甲基-O-(3-甲基-4-甲硫基苯基)硫代磷酸酯,是一种有机磷杀虫剂。

性质

无色油状液体。工业品呈棕黄色,带有特殊臭味。易溶于甲醇乙醇丙酮甲苯二甲苯氯代烃、脂肪油等有机溶剂,难溶于石油醚。对光和热比较稳定。用过氧化氢高锰酸钾氧化时可得到相应的亚砜

制取

加入硫化物水溶液中,与硫酸二甲酯反应得二甲二硫。二甲二硫与间甲酚在浓硫酸作用下反应,得3-甲基-4-甲硫基苯酚。3-甲基-4-甲硫基苯酚与O,O-二甲基硫代磷酰氯在氢氧化钠溶液中反应,得倍硫磷。

3-甲基-4-甲硫基苯酚也可由间甲酚与二甲基亚砜混合后通入氯化氢而制得。

用途

速效、广谱、中毒有机磷杀虫剂,有触杀、胃毒作用,渗透性较强,有一定的内吸作用,对螨类也有效。

参考资料

  • 彭志源主编. 中国农药大典. 中国科技文化出版社. 2006: 355–356. 
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倍硫磷
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