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Chromate (hexavalent) Test Kits

Chromate (hexavalent) Test Kits

Click on a catalog number in the tables below for more information or to purchase a test kit.

Visual Kits

Range MDL Method Kit Catalog No. Refill Catalog No.
0-1 & 1-10 ppm 0.05 ppm Diphenylcarbazide K-2810 R-2810

Instrumental Kits

Range Method Kit Catalog No.
0-3.50 ppm Diphenylcarbazide K-2803


Hexavalent chromium salts are used in numerous industrial processes. They are also used extensively as corrosion inhibitors in open and closed cooling water systems

The Diphenylcarbazide Method

References: APHA Standard Methods, 23rd ed., Method 3500-Cr  B- 2009. ASTM D 1687-02, Chromium in Water, Test Method A.
With the chromate test method, hexavalent chromium reacts with diphenylcarbazide under acid conditions to form a red-violet color. Results are expressed as ppm (mg/L) CrO4.