Products

 

PIRIMICARB

 

Insecticide
carbamate

NOMENCLATURE
Common name pirimicarb (BSI, E-ISO, ANSI, JMAF); pirimicarbe ((m) F-ISO); pyrimicarbe (France)
IUPAC name 2-dimethylamino-5,6-dimethylpyrimidin-4-yl dimethylcarbamate 
Chemical Abstracts name 2-(dimethylamino)-5,6-dimethyl-4-pyrimidinyl dimethylcarbamate 
CAS RN [23103-98-2]  EEC no. 245-430-1  Development codes PP062 (ICI)  Official codes ENT 27 766; OMS 1330 

PHYSICAL CHEMISTRY
Composition Tech. material is 95% pure.  Mol. wt. 238.3  M.f. C11H18N4O2  Form White solid.  M.p. 91.6 °C  V.p. 4 ´ 10-1 mPa (20 °C, by interpolation)  KOW logP = 1.7 (unionised)  Henry 3.6 ´ 10-5 Pa m3 mol-1 (calc.)  S.g./density 1.18 (25 °C); tech. 1.21 (25 ºC)  Solubility In purified water 3.0 g/l (20 ºC). In acetone, methanol, xylene >200 g/l (20 ºC).  Stability Stable under normal storage conditions for more than 2 years. Hydrolytically stable at pH 4-9 (25 °C). Aqueous solutions are unstable to u.v. light; DT50 <1 d (pH 5, 7 or 9).  pKa 4.44 (20 °C), weak base 

COMMERCIALISATION
History Aphicide reported by F. L. C. Baranyovits & R. Ghosh (Chem. Ind. (London), 1969, p. 1018). Introduced by ICI Plant Protection Division (now Syngenta AG) and first marketed in 1970.  Patents GB 1181657  Manufacturers Jiangsu; Syngenta

APPLICATIONS

Biochemistry Cholinesterase inhibitor.  Mode of action Selective systemic insecticide with contact, stomach, and respiratory action. Absorbed by the roots, and translocated through the xylem. Penetrates the leaves, but is not translocated extensively.  Uses A selective aphicide used in a wide range of crops, including cereals and oilseeds (at 125-250 g/ha), potatoes and other vegetables (at 125-375 g/ha), fruit (at 250-750 g/ha), ornamentals and other non-food uses (at 50-500 g/ha). Effective against organophosphorus-resistant Myzus persicae.  Formulation types AE; DP; EC; FU; WG; WP.