The use of at least one surfactant as a compatibility agent for a herbicidal formulation, said formulation comprising at least one amine salt of a phenoxy acid herbicide, to prevent the formation of insoluble salts of said phenoxy acid herbicide in presence of non-amine cations, wherein said compatibility agent is selected from the group consisting of i. an alkoxylated quaternary surfactant of the formula: wherein R1 is a straight or branched chain, saturated or unsaturated alkyl group having from 8 to 22 carbon atoms; R2 is a straight or branched chain, saturated or unsaturated alkyl group having from 1 to 4 carbon atoms; and A is C i H 2i where i is 2 to 4; B is C j H 2j where j is 2 to 6; and X - is a compatible anion, f is zero to 10; m and n is an integer of from 1-30 with the proviso that m + n is at least 2, p is 1 to 7 and g is any number from zero to 6 for each p and independent of p, and q is 1 to 7; ii. an alkyl quaternary surfactant of the formula wherein R1 is a straight or branched chain, saturated or unsaturated alkyl group having from 8 to 22 carbon atoms; R2, R3, and R4 is independently a straight or branched chain, saturated or unsaturated alkyl group having from 1 to 4 carbon atoms; A is C i H 2i where i is 2 to 4; B is C j H 2j where j is 2 to 6; and X - is a compatible anion; f is zero to 10; p is 1 to 7 and g is any number from zero to 6 for each p and independent of p, and q is 1 to 7; iii. an alkoxylated amine of the formula wherein R1 is a straight or branched chain, saturated or unsaturated alkyl group having from 8 to 22 carbon atoms; A is C i H 2i where i is 2 to 4; and B is C j H 2j where j is 2 to 6; f is zero to 10; m and n is an integer of from 0-30 with the proviso that m + n is at least 1, p is 1 to 7 and g is any number from zero to 6 for each p and independent of p; iv. an amidoamine of the formula: where R1 a straight or branched chain, saturated or unsaturated alkyl group having from 7 to 21 carbon atoms; v. alkoxylated amido polyamines of the formula wherein R1 is a straight or branched chain, saturated or unsaturated alkyl group having from 7 to 21 carbon atoms; A is C i H 2i where i is 2 to 4; n, m, p, and q all is 1 to 20 independently; x and y is 0 to 5 independently with a provision of x + y greater than or equal to 1; vii. tristyrylphenol ethoxylate with 8 - 30 EO and its phosphate or salts thereof; ix. alkyl olefin sulfonate having an alkyl chain length between C8 and C18 and salts thereof; x. castor oil EO-PO alkoxylate having a total of 25 to 50 EO + PO units, or castor oil ethoxylate 20 EO, or castor oil ethoxylate 36 EO, or castor oil ethoxylate 55 EO. i. an alkoxylated quaternary surfactant of the formula: wherein R1 is a straight or branched chain, saturated or unsaturated alkyl group having from 8 to 22 carbon atoms; R2 is a straight or branched chain, saturated or unsaturated alkyl group having from 1 to 4 carbon atoms; and A is C i H 2i where i is 2 to 4; B is C j H 2j where j is 2 to 6; and X - is a compatible anion, f is zero to 10; m and n is an integer of from 1-30 with the proviso that m + n is at least 2, p is 1 to 7 and g is any number from zero to 6 for each p and independent of p, and q is 1 to 7; ii. an alkyl quaternary surfactant of the formula wherein R1 is a straight or branched chain, saturated or unsaturated alkyl group having from 8 to 22 carbon atoms; R2, R3, and R4 is independently a straight or branched chain, saturated or unsaturated alkyl group having from 1 to 4 carbon atoms; A is C i H 2i where i is 2 to 4; B is C j H 2j where j is 2 to 6; and X - is a compatible anion; f is zero to 10; p is 1 to 7 and g is any number from zero to 6 for each p and independent of p, and q is 1 to 7; iii. an alkoxylated amine of the formula wherein R1 is a straight or branched chain, saturated or unsaturated alkyl group having from 8 to 22 carbon atoms; A is C i H 2i where i is 2 to 4; and B is C j H 2j where j is 2 to 6; f is zero to 10; m and n is an integer of from 0-30 with the proviso that m + n is at least 1, p is 1 to 7 and g is any number from zero to 6 for each p and independent of p; iv. an amidoamine of the formula: where R1 a straight or branched chain, saturated or unsaturated alkyl group having from 7 to 21 carbon atoms; v. alkoxylated amido polyamines of the formula wherein R1 is a straight or branched chain, saturated or unsaturated alkyl group having from 7 to 21 carbon atoms; A is C i H 2i where i is 2 to 4; n, m, p, and q all is 1 to 20 independently; x and y is 0 to 5 independently with a provision of x + y greater than or equal to 1; vii. tristyrylphenol ethoxylate with 8 - 30 EO and its phosphate or salts thereof; ix. alkyl olefin sulfonate having an alkyl chain length between C8 and C18 and salts thereof; x. castor oil EO-PO alkoxylate having a total of 25 to 50 EO + PO units, or castor oil ethoxylate 20 EO, or castor oil ethoxylate 36 EO, or castor oil ethoxylate 55 EO.