Prometryn

Common name prometryn (BSI from 1984, E-ISO, ANSI, WSSA); prometryne ((f) F-ISO, JMAF and, until 1984, BSI)

IUPAC name N2,N4-di-isopropyl-6-methylthio-1,3,5-triazine-2,4-diamine 

Chemical Abstracts name N,N'-bis(1-methylethyl)-6-(methylthio)-1,3,5-triazine-2,4-diamine 

CAS RN [7287-19-6]  EEC no. 230-711-3  Development codes G 34 161 (Geigy) 

Composition Tech. is 97% pure.  

Mol. wt. 241.4 

M.f. C10H19N5S 

Form White powder. 

M.p. 118-120 篊 

B.p. >300 癈/100 kPa 

V.p. 0.165 mPa (25 篊) (OECD 104) 

KOW logP = 3.1 (25 篊, unionised) 

Henry 1.2 ´ 10-3 Pa m3 mol-1 (calc.) 

S.g./density 1.15 (20 篊) 

Solubility In water 33 mg/l (25 篊). In acetone 300, ethanol 140, hexane 6.3, toluene 200, n-octanol 110 (all in g/l, 25 篊). 

Stability Stable to hydrolysis at 20 篊 in neutral, slightly acidic or slightly alkaline media. Hydrolysed by warm acids and alkalis. Decomposed by u.v. irradiation. 

Mode of action Selective systemic herbicide, absorbed by the leaves and roots, with translocation acropetally through the xylem from the roots and foliage, and accumulation in the apical meristems. 

Uses Herbicide