Chromate Test Kit $1.00 Manufacturer: lamotte Test Method: Visual Test Kits Range/Sensitivity: 5 ∙ 10 ∙ 15 ∙ 20 ∙ 25 ∙ 30 ∙ 35 ∙ 40 ppm Na__2__CrO__4__ (lower or higher ranges by dilution) Number of tests: 50 For Determination Of: chromate Order Type: Choose an optionRefill KitTest KitClear Chromate Test Kit quantity Add to cart Add to Enquiry SKU: N/A Description Description Diphenylcarbazide reacts with chromate (hexavalent chromium) to form a red to violet color in an acid solution.