Read our standard health & safety guidance
Refer to CLEAPSS Hazcard 78 and CLEAPSS Recipe Card 53.
Potassium dichromate(VI) indicator papers can be made in a similar way to cobalt chloride indicator papers.
Use a 0.1 mol dm–3 solution of potassium dichromate(VI), mixed with an equal volume of 1 mol dm–3 sulfuric acid.
Potassium dichromate is Very Toxic and a Danger to the environment and May cause sensitisation. The indicator papers should be handled as little as possible and hands washed after use.
1 mol dm-3 sulfuric acid is an Irritant. One drop of the mixed solution on a piece of filter paper will allow users to avoid direct contact.
Health and safety checked, November 2007
Updated 3 Dec 2007
