... calc.) S.g./density 1.41 (23.5 ) Solubility In water 395 (pH 1), 26.2 (pH 5), 273 ... (pH 7), 320.1 (pH 9) (all in mg/l, 25 ). In diethyl ether 770, toluene 26.5, xylene 49 ... 6, dichloromethane 69.2, n-octanol 218.3 (all in g/l, 25 ). Stability The acid is chemically ... amine salts, although precipitation of calcium or magnesium salts may occur in hard water. Photochemical DT50 (artificial sunlight) 25.4 d ...