Calcium Carbonate Alkalinity Standard at 1,000 µg/mL in H2O, 500 mL.
Can be used as stock solutions for EPA Method 310.2.
This standard is traceable to NIST SRM 3100 series. ISO 9001:2015 certified, ISO/IEC 17025:2017 and ISO 17034:2016 accredited.
12 month expiration date.