2000ppm Free Chlorine

The color chart has ranges for sanitization (50-200ppm) & disinfection (500-800ppm). 800ppm is considered the maximum level for child safety in the event of ingestion.

You can use our free Chlorine Bleach Dilution Calculator to correctly calculate the amount of bleach & water needed to prepare the ppm levels indicated above. This calculator will allow for any concentration of chlorine bleach to be used to prepare a sanitizing/disinfecting solution but in this instance the video shows an 8.25% solution diluted to produce 650ppm (the midway point of 500-800ppm for disinfection as shown on the color chart).

Note: the video below has references to our original domain, indigo.com. Please ignore and bookmark us at www.indigoinstruments.com.


You may also want to look at the following 2 pdf files from the State of California for "Sanitize Safely & Effectively" & "What is Safe & Effective Use of Bleach"

• Strips come in desiccant lined bottle that absorbs moisture once opened.
• Best used within 6 months of opening.
• Guaranteed 2 year shelf life but can last 5 years if unopened.
• These strips measure free (available) chlorine
• The number of strips (100) per vial is approximate.

Test Strip Documentation
Stability Statement	Certificate of Analysis

The table shows the amount of bleach needed for different ppm levels based on an initial concentration of 5% (most bleach sold in North America is rated at 5.25% but loses strength with time).

1. Choose a container large enough to hold the final amount of diluted bleach you want to make.
2. Measure & pour into the container the amount of 5% (initial) chlorine bleach you need.
3. Fill the container with water to the level of the Final Volume.
4. For concentrations other than 5%, use our Dilution Calculator to determine what you need.
5. If you are unfamiliar with millilitres (mL), you can use this Metric to American volume converter.
6. If you don't have the exact measuring tool, round up not down. i.e. for 47.5ml use a 1/4 cup.

Amount of 5% Chlorine Bleach to Make Final Volume
50 (ppm) ml Bleach	200 (ppm) ml Bleach	500 (ppm) ml Bleach	800 (ppm) ml Bleach	Volume (ml) Final
0.25	1	2.5	4	250ml
1	4	10	16	1000ml
4	16	40	64	4000ml
0.23	0.9	2.25	3.6	225ml (US cup)
0.95	3.8	9.5	15.2	950ml (US Quart)
3.8	15.2	38	60.8	3.8L (US Gal.)

You can view the structure of the chemical indicator for this strip by clicking on: 3,3’,5,5’ – tetramethylbenzidine.