Inorganic Ventures' pH 1.68 Standard is a 250 mL certified reference material set in a water matrix for stability. This standard is Traceable to NIST and manufactured in accordance with our stringent Quality Assurance guidelines. One year Expiration Date . Size: 250 mL …

All standards are 1 pint (475mL) bottles, unless otherwise noted. 0732J61 Fluoride Standard Bulk Pack – includes 4 x 475 mL each of 1 ppm Fluoride standard premixed with TISAB II (4210F31) and 10 ppm Fluoride standard premixed with TISAB II (0732J60).