Shop › Hach Iron Standard Solution, 1 mg/L as Fe (NIST), 500 mL P/N: 13949 Image 1 of 1 Hach Iron Standard Solution, 1 mg/L as Fe (NIST), 500 mL P/N: 13949 $52.00 Add To Cart Added! Product Number: 13949For accuracy checks in iron determinations Product Number: 13949For accuracy checks in iron determinations You Might Also Like Hach Iron color disc test kit, model IR-18A P/N: 146500 $158.00 Hach Manver 2 Hardness Indicator Powder Pillows, 50 mL Sample, pk/100 P/N: 85199 $36.00 Hach Silica Reagent Set, Ultra Low Range Rapid Liquid P/N: 2678500 $234.00 Hach Silica Reagents Low Range 0.01-1.60 mg/L P/N: 2459300 $145.00 Hach FerroVer Iron Reagent Powder Pillows, 10 mL, pk/1000 P/N: 2105728 $475.00