And essentially solid at propionic acid-containing compositions in pure form, the present invention provides a compound of formula (I) (M n +) (H +) x (CH 3 CH 2 C (O) O -) (n + x (I), [wherein, represents an alkaline earth metal cation or an alkali metal cation having a valence of n, Here, n is 1 or 2 M n +) within the range of 0.25 to 5 and x represents the number is However, when the M n + represents the potassium, characterized in that it contains at least one compound according to] not within the scope of 0.75~1.75, x is essential and a solid manufacturing method of the propionic acid-containing composition propionic acid-containing composition of the pure form as well as in, feed additives raw materials silage additives for animal feed, preservatives, acidifying agents, nutritional supplements, or feed ingredients to the use of the composition as a agent.本発明は、固体でかつ本質的に純粋な形のプロピオン酸含有組成物において、式(I)(Mn+)(H+)x(CH3CH2C(O)O-)(n+x)(I),[式中、Mn+はn価のアルカリ金属カチオン又はアルカリ土類金属カチオンを表し、ここで、nは1又は2であり;かつxは0.25~5の範囲内の数を表すが;但し、Mn+がカリウムを表す場合、xは0.75~1.75の範囲内にはない]による化合物少なくとも1種を含有することを特徴とする、固体でかつ本質的に純粋な形のプロピオン酸含有組成物;該プロピオン酸含有組成物の製造法;並びに、動物用飼料のためのサイレージ添加剤、保存剤、酸性化剤、栄養補助食品、飼料原料又は飼料原料添加剤としての該組成物の使用に関する。
