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Stabilized aqueous formulations of sulfonylurea salts

  • US 4,936,900 A
  • Filed: 01/07/1987
  • Issued: 06/26/1990
  • Est. Priority Date: 04/04/1983
  • Status: Expired due to Fees
First Claim
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1. An aqueous composition having a pH in the range 6-10 and having improved chemical and suspension stability consisting essentially of an agriculturally suitable salt of a carboxylic or an inorganic acid, or mixtures of such carboxylic or inorganic acid salts, provided that the solubility of carboxylic or inorganic acid salts at 5°

  • C. and at pH 6-10 is greater than or equal to 3% and further provided that the pH of a 0.1 molar solution of the carboxylic or inorganic acid salt is between 6 and 10, and one or more compounds selected from ##STR6## wherein the concentration of the carboxylic or inorganic acid salt or salts is between 3% and the salt saturation limit of the aqueous solution, and ##STR7## R1 is H or CH3 ;

    R2 is F, Cl, Br, C1 -C4 alkyl, SO2 NR6 R7, S(O)n R8, SO2 NCH3 (OCH3), CO2 R9, OSO2 R10, OR11, NO2, ##STR8## R3 is H, F, Cl, Br, CH3, OCH3 or CF3 ;

    R4 is Cl, NO2 or CO2 R10 ;

    R5 is Cl, Br, SO2 NR6 R7, S(O)n R10 or CO2 R10 ;

    R6 and R7 are independently C1 -C3 alkyl;

    R8 is C1 -C3 alkyl or C1 -C3 alkyl substituted by 1-5 atoms of F, Cl or Br;

    R9 is C1 -C4 alkyl, CH2 CH2 OCH3, CH2 CH2 Cl or CH2 CH═

    CH2 ;

    R10 is C1 -C3 alkyl;

    R11 is C1 -C4 alkyl, CH2 CH═

    CH2, CH2 C.tbd.CH, or C1 -C3 alkyl substituted with 1-5 atoms of F, Cl or Br;

    n is 0 or 2;

    Z is CH or N;

    X is CH3, OCH3, Cl or OCHF2 ;

    Y is CH3, OCH3, CH(OCH3)2, OCHF2 or ##STR9## and M+m is an agriculturally suitable cation;

    m is 1, 2, or 3;

    provided that when X is Cl then Z is CH and Y is OCH3 or OCF2 H.

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