Anions, Environmental Reference Materials, Inorganics, Water Chemistry CRMsPerchlorate CRM #IS-027$33.00 – $51.001000mg/L in Water. Derived from high purity Sodium perchlorate, NIST traceable. read moreOptions Choose an option125 mL500 mLClear Add to cart Compare Catalog Number:IS-027.Options125 mL, 500 mLRelated products Quick View Add to cart Compare $59.00 Environmental Reference Materials Chlorite – 125mL #IC-016 Quick View Add to cart Compare $59.00 Environmental Reference Materials Calcium – 125mL #IC-008 Quick View Add to cart Compare $59.00 Environmental Reference Materials Cyanide – 125mL #IC-019 Quick View Add to cart Compare $59.00 Environmental Reference Materials Magnesium – 125mL #IC-024