This short-range Hydrion Brilliant pH Paper provides excellent color separation in the acid range and offers clear bright single color matches at every .5 interval from pH 0.0-6.0. As a safety precaution, an unknown solution should be measured for its pH value. If it is found to be too acidic, the solution may be dangerous to handle, or may have special disposal requirements. The color chart has pH matches at [0.0][0.5][1.0][1.5][2.0][2.5][3.0][3.5][4.0][4.5][5.0][5.5][6.0] Hydrion Brilliant pH Paper is a general use pH paper. A sample of its diverse pH applications include: Classroom Demonstrations Hospital Laboratories General Laboratories Industrial Testing Food Service Safety Testing Emergency Testing Agricultural Testing