Thermo Scientific Orion® Pure Water„¢ pHISA Adjustor Solution Bulk Pack 5 x 60mL. Thermo Scientific Orion® Pure Water„¢ pH buffers and pHISA adjustor provide fast, accurate pH results in high purity and low ionic strength waters. Recommended for samples such as well water, rain water, distilled/deionized water, boiler feed water and process water. Increases measurement accuracy. Reduces electrode drift. Eliminates contamination of sample. Clear solution. Soluble. Specific gravity: 1.01. Boiling point: 100°C. pH: 5.5 to 5.7. Size: 60mL. Case of 5. Thermo Scientific Orion® #: 700003.