Stabilized aqueous formulations of sulfonylurea salts
First Claim
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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Abstract
This invention relates to stabilized aqueous compositions consisting essentially of a sulfonylurea or its agriculturally suitable salt with a salt of a carboxylic or an inorganic acid, or with mixtures of such carboxylic or inorganic acid salts, provided that the solubility of carboxylic or inorganic acid salts at 5° C. and a pH of about 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.
22 Citations
25 Claims
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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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
- 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 ;
Specification