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> 400 litmus paper test strips alkaline acid ph indicator
400 litmus paper test strips alkaline acid ph indicator
400 Litmus Paper Test Strips Alkaline Acid pH Indicator
* 1 - 3 indicates a very acidic substance
* 4 - 6 indicates an acidic substance
* 8 - 11 indicates alkalinity
* 12 - 14 indicates a very high level of alkalinity
* Pack size: 5 books each containing 80 strips (400 strips in total)
