Environmental Reference Materials, Inorganics, Water Chemistry CRMs COD CRM #IS-001H-500 $76.00 10000 mg/L in Water read more Options Choose an option500 mLClear Add to cart Compare Catalog Number: IS-001H Options 500 mL Related products Quick View Add to cart Compare $59.00 Environmental Reference Materials Chloride – 125mL #IC-013 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 Nitrate – 125mL #IC-025 Quick View Add to cart Compare $59.00 Environmental Reference Materials Nitrite – 125mL #IC-031