A method of making a solid triamine composition comprising: at least partially neutralizing a triamine; reacting the biocidal triamine with a diacid to generate an amine salt; and solidifying the composition, wherein the diacid is selected from the group consisting of tartaric acid, malic acid, maleic acid, malonic acid, succinic acid, adipic acid, glutamic acid and dipicolinic acid, wherein the biocidal triamine is represented by the formula wherein R is a linear or branched alkyl residue with C1-22, or wherein the triamine has any one of the following formulas: R-NH-[(CH 2) r NH] y -(CH 2) m -NH 2 R-NH-[(CH 2) r -NH] y (CH 2) m -NH 2 (H + X" -) n wherein: R is a linear or branched alkyl residue with 6 to 22 C atoms, X" is an equivalent of an anion comprising an amidosulfonate, nitrate, halide, sulfate, hydrogen carbonate, carbonate, phosphate, hydroxide, carboxylate, and/or organic acid, m and r independently represent an integer ranging from 1 to 6, y is 1, and n is an integer ranging from 1 to 2+y; wherein the solid composition remains solid below 50° C, and wherein the weight ratio of the diacid to the triamine is from 1:10 to 1:1, and wherein total water content of the solid composition is less than 10 wt-%. at least partially neutralizing a triamine; reacting the biocidal triamine with a diacid to generate an amine salt; and solidifying the composition, wherein the diacid is selected from the group consisting of tartaric acid, malic acid, maleic acid, malonic acid, succinic acid, adipic acid, glutamic acid and dipicolinic acid, wherein the biocidal triamine is represented by the formula wherein R is a linear or branched alkyl residue with C1-22, or wherein the triamine has any one of the following formulas: R-NH-[(CH 2) r NH] y -(CH 2) m -NH 2 R-NH-[(CH 2) r -NH] y (CH 2) m -NH 2 (H + X" -) n wherein: R is a linear or branched alkyl residue with 6 to 22 C atoms, X" is an equivalent of an anion comprising an amidosulfonate, nitrate, halide, sulfate, hydrogen carbonate, carbonate, phosphate, hydroxide, carboxylate, and/or organic acid, m and r independently represent an integer ranging from 1 to 6, y is 1, and n is an integer ranging from 1 to 2+y; wherein R is a linear or branched alkyl residue with C1-22, or wherein the triamine has any one of the following formulas: R-NH-[(CH 2) r NH] y -(CH 2) m -NH 2 R-NH-[(CH 2) r -NH] y (CH 2) m -NH 2 (H + X" -) n wherein: R is a linear or branched alkyl residue with 6 to 22 C atoms, X" is an equivalent of an anion comprising an amidosulfonate, nitrate, halide, sulfate, hydrogen carbonate, carbonate, phosphate, hydroxide, carboxylate, and/or organic acid, m and r independently represent an integer ranging from 1 to 6, y is 1, and n is an integer ranging from 1 to 2+y; R is a linear or branched alkyl residue with 6 to 22 C atoms, X" is an equivalent of an anion comprising an amidosulfonate, nitrate, halide, sulfate, hydrogen carbonate, carbonate, phosphate, hydroxide, carboxylate, and/or organic acid, m and r independently represent an integer ranging from 1 to 6, y is 1, and n is an integer ranging from 1 to 2+y; wherein the solid composition remains solid below 50° C, and wherein the weight ratio of the diacid to the triamine is from 1:10 to 1:1, and