Phosphate- and surfactant-free concentrate for the neutralisation of alkaline residues from the main cleaning process and/or for the pre-cleaning during machine cleaning in washer disinfectors. Based on citric acid. Instructions for use: mechanical cleaning/pre-cleaning: 2-4ml/L (0.2-0.5%) at 40-60°C; neutralisation in the automated washer disinfector cleaning process: 1-2ml/L (0.1-0.2%). The use of demineralised water for final rinsing is recommended. Do not mix with other products (before change of product, flush the dosing system including the suction hoses with water). Reprocessing must be carried out in accordance with the RKI guidelines, manufacturer guidelines, DIN EN ISO 17664 requirements, and the Medical Device Operator Ordinance using suitable procedures.