Low pH phenolic disinfectant without para tertiary amylphenol

A process for making a low pH, gamma-irradiation stable, concentrated phenolic disinfectant solution, comprising the steps of:

• adding together and mixing components comprising;
• a phenolic disinfectant comprising ortho phenylphenol in an amount from about 1% to about 15% by weight, ortho-benzyl parachlorophenol in an amount from about 2% to about 25% by weight, or parachloro-meta-cresol in an amount from about 1% to about 15% by weight, or any combination thereof;
• at least one hydrotropic surfactant;
• at least one hydrophilic acidic surfactant;
• at least about 5% by weight of a phosphoric acid;
• one or more aliphatic alcohols having from C1 to C6 atoms;
• and
• water, wherein the amount thereof is the weight difference of all other components and 100 wt. %;
• wherein the solution is essentially free of a glycol and a polyglucoside;
• wherein said phenolic disinfectant solution is essentially free of an emulsion surfactant and a solubilizing surfactant;
• wherein said phenolic disinfectant solution is essentially free of para tertiary amylphenol;
• and
• forming a phenolic disinfectant solution having a pH of from about 0.5 to about 4.0;
• wherein the amounts of the above components are percent by weight based on the total weight of said concentrated phenolic disinfectant solution.