Simazine
Simazine is a herbicide of the triazine class. The compound is used to control broad-leaved weeds and annual grasses.
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IUPAC name
6-Chloro-N,N'-diethyl-1,3,5-triazine-2,4-diamine | |
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ChEBI | |
ChEMBL | |
ChemSpider | |
ECHA InfoCard | 100.004.124 |
KEGG | |
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UNII | |
CompTox Dashboard (EPA) |
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Properties | |
C7H12ClN5 | |
Molar mass | 201.66 g·mol−1 |
Appearance | White crystalline powder |
Density | 1.3 g/cm3 |
Melting point | 225–227 °C (437–441 °F; 498–500 K) |
5 mg/L | |
Solubility in other solvents | Soluble in methanol, chloroform, and diethyl ether; slightly soluble in pentane |
log P | 1.9600 |
Vapor pressure | 0.000810 mPa at 20 °C |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). | |
verify (what is ?) | |
Infobox references | |
Preparation
Simazine may be prepared in the laboratory from cyanuric chloride crystals and a strong solution of ethyl amine (at least 50 percent by number in water). The reaction is highly exothermic and is therefore best carried out in an ice bath below 10 °C. It is also essential to carry out the synthesis in a fume hood since cyanuric chloride decomposes at high temperatures into hydrogen chloride and hydrogen cyanide, both of which are highly toxic by inhalation.
Properties and uses
Simazine is an off-white crystalline compound which is sparingly soluble in water. It is a member of the triazine-derivative herbicides, and was widely used as a residual nonselective herbicide, but is now banned in European Union states.[1] Like atrazine, a related triazine herbicide, it acts by inhibiting photosynthesis. It remains active in the soil for 2-7 months or longer after application.
See also
References
- EU directive 91/414/EEC
External links
- Simazine, Extoxnet PIP