US 2018/0235218 Al  4  Aug. 23, 2018  [0085]  In a further preferred embodiment, the application  solution consists of  [0106]  Particularly preferably, the organic acids in the  application solution mathematically meet the following con› ditions (data in% by weight):  [0105]  More particularly, the sum of propionic acid, acetic  acid, lactic acid and tartaric acid in the application solution  is below 10% by weight.  [0104]  Preferably, the application solution of the disinfec› tant according to the invention contains organic acids in a  concentration of 0.1-10% by weight, particularly preferably  0.3-5.0% by weight.  [0079]  In a preferred embodiment, the application solution  consists of  [0078]  During the preparation of the concentrates accord› ing to the invention, a further unexpected effect was found.  In the presence of a relatively strong acid, sodium benzoate  does not exhibit any solubility in an aqueous, glycol-con› taining solution. It is found that, surprisingly, sodium ben› zoate in the presence of relatively weak acids can, even in  the presence of a relatively strong acid and low pH values,  be dissolved without any problems to form a colorless and  clear composition. This is surprising, since the presence of  a relatively strong acid leads to a protonation of the benzo› ate, resulting in the presence of the poorly water-soluble  benzoic acid. The presence of at least one relatively weak  acid is sufficient for bringing sodium benzoate into a stable,  aqueous, colorless solution.  wherein the sum of  [0097]  In a preferred embodiment, the application solution  consists of  wherein the sum of (a)+(c) is <10.0.  [0091]  In a preferred embodiment, the application solution  consists of  wherein the sum of  (a)  10  +  (c) is< 1.0.  (a)  .  10  +  (c)  +  (d)  1s < 1.0.  Acetic acid and/or propionic acid  Tartaric acid  +  lactic acid  10  +  1  s  1.0  Acetic acid and/or propionic acid  Lactic acid  10  +  1  s  1.0  [0086]  a) 0.45-10% by weight of at least one organic  acid selected from acetic acid, propionic acid or a  combination of these,  [0084]  wherein at least 3 acids and/or the salts thereof  (a) and (b) are present.  [0083]  d) water,  [0082]  c) 0-2% by weight of solubilizer selected from  hexyl carbitol and propylene glycol or a combination of  these and  [0081]  b) 0.1-1% by weight selected from sodium ben› zoate or sodium acetate or a combination of these,  [0080]  a) 0.45-10% by weight of at least one organic  acid selected from acetic acid, propionic acid or a  combination of these,  [0096]  e) water,  [0103]  f) water,  [0102]  e) 0-2% by weight of solubilizer selected from  hexyl carbitol and propylene glycol or a combination of  these and  [0101]  d) optionally 0.1-1% by weight of tartaric acid,  [0100]  c) optionally 0.1-1% by weight of lactic acid,  [0099]  b) 0.1-1% by weight selected from sodium ben- zoate or sodium acetate or a combination of these,  [0098]  a) 0.45-10% by weight of at least one organic  acid selected from acetic acid, propionic acid or a  combination of these,  [0077]  (4) Some aromatic carboxylic acids can act as  depolarizers via their redox potential, by, for example,  being able to inhibit ion channels of the cells and to  thus lead to a charge reversal.  [0076]  (3) Intracellular action: The undissociated acid  (R-COOH) can, owing to an absent hydration shell,  pass through the cell wall of a microorganism more  easily than the corresponding anion. In the interior of  the organism, a relatively high pH prevails, resulting in  the acid activity being released-comparable to (1)› and this leads to the denaturation of important proteins  and further unspecific reactions within the organism.  [0095]  d) 0-2% by weight of solubilizer selected from  hexyl carbitol and propylene glycol or a combination of  these and  [0094]  c) 0.1-1% by weight of tartaric acid,  [0093]  b) 0.1-1% by weight selected from sodium ben› zoate or sodium acetate or a combination of these,  [0092]  a) 0.45-10% by weight of at least one organic  acid selected from acetic acid, propionic acid or a  combination of these,  [0075]  Reason: Disruption of cell proliferation and  equilibrium concentration between intracellular and  extracellular space. According to one assumption,  the long-chain fatty-acid anions are positioned  between the phospholipid molecules and are, from a  certain concentration, statistically sufficiently close  to one another for them, owing to their coo› groups, to push apart the membrane molecules and to  thus effectively contribute to the perforation of the  cell membrane.  [0074]  (2) Action due to attachment of the acid anion to  the cell membrane of the microorganism. R----Coo› ----;,cell wall/phospholipid membrane.  [0090]  e) water,  [0089]  d) 0-2% by weight of solubilizer selected from  hexyl carbitol and propylene glycol or a combination of  these and  [0088]  c) 0.1-1% by weight of lactic acid,  [0087]  b) 0.1-1% by weight selected from sodium ben› zoate or sodium acetate or a combination of these,  [0073]  Reason: Each microorganism has its cardinal  conditions; if there is a change to these-for example  the pH-the growth rate decreases (up to inhibition).  [0072]  (1) Action due to lowering of the pH through  dissociation  of the  organic  acid.  R-COOH+  H$_{2}$O----;,R-COO-+H$_{3}$O+. 