Reference Manual - IARC Screening Group

Infection Prevention Processesfor making a dilute solution from a commercial preparation of anyconcentration is shown in Figure C-1.Table C-2. Preparing a Dilute Chlorine Solution from Liquid Bleach (SodiumHypochlorite Solution) for Decontamination and HLDabcTYPE OR BRAND OFBLEACH (COUNTRY)JIK (Kenya), Robin Bleach(Nepal)Household bleach (USA,Indonesia), ACE (Turkey), Eaude Javal (France) (15° chlorum c )CHLORINE% AVAILABLEPARTS WATER TO 1PART BLEACH a0.5% 0.1% b3.5% 6 345% 9 49Blanquedor, Cloro (Mexico) 6% 11 59Lavandina (Bolivia) 8% 15 79Chloros (UK) 10% 19 99Chloros (UK), Extrait de Javel(France) (48° chlorum c )15% 29 149Read as one part (e.g., cup or glass) concentrated bleach to x parts water (e.g., JIK[0.5% solution]—mix 1 cup bleach with 6 cups water for a total of 7 cups).Use boiled water when preparing a 0.1% chlorine solution for HLD because tap watercontains microscopic organic matter that inactivates chlorine.In some countries the concentration of sodium hypochlorite is expressed inchlorometric degrees (°chlorum); one °chlorum is approximately equivalent to 0.3%available chlorine.Figure C-1. Formula for Making a Dilute Chlorine Solution from ConcentratedSolutionSTEPS• Determine concentration (% concentrate) of the chlorine solutionyou are using.• Determine total parts water needed (use formula below or TableC-3).⎡% concentrate ⎤Total Parts (TP) water = ⎢− 1% dilute ⎥⎣⎦Mix 1 part bleach with the total parts water.Example: Make a dilute solution (0.5%) from 5% concentratedsolution.⎡5.0%⎤1. Calculate TP water: ⎢ − 1 = 10 − 1 = 90 5 ⎥⎣ . % ⎦2. Add 1 part concentrated solution to 9 parts water.The approximate amounts (grams) needed to make 0.5% and 0.1%chlorine-releasing solutions from several commercially availablecompounds (dry powders) are listed in Table C-3. The formula forCervical Cancer Prevention Guidelines for Low-Resource Settings C-3