R-6720 Molybdate

Molybdate Kit was designed to obtain molybdate levels from 20-200 ppm

*Refill kit for the K-6720*

Molybdate Information


The K-6720 Molybdate Kit was designed to accurately measure the levels of molybdate in water from 20-200 ppm. K-6720 uses the Catechol Method. The molybdate test method employs the catechol chemistry. In a mildly reducing alkaline solution, catechol reacts with hexavalent molybdenum to form a yellow-orange colored chelate in direct proportion to the hexavalent molybdenum concentration. Test results are expressed in ppm (mg/L) molybdenum (Mo). 

Molybdate is used throughout the industrial water treatment and power generation industries as a corrosion inhibitor in both open- and closed-loop cooling water systems. In solution, molybdate anions complex with oxidized iron to form a protective film of molybdate and ferric-oxide. Molybdate is considered an effective, environmentally acceptable alternative to chromate treatment. Unlike many other transition elements, molybdenum exhibits low or even negligible toxicity. 

R-6720 Refill Package includes 30 tests and can be purchased separately.

What's included:

  • 30 Ampoules
  • Comparator
  • Activator Solution
  • 25 mL Sample Cup
  • Instruction Manual



How to use:

  1. Fill to the sample cup to the 25 mL mark with sample water.Fill the sample cup to 25ml
  2. Insert the ampoule tip first into the sample, and snap the ampoule tip.
  3. Mix ampoule by inverting several timesTip the vacu-vial back and forth to mix
  4. Dry the ampoule, and wait 1 minute for color development.
    Dry vacu-vial and then insert into the I-2019
  5. Obtain results using the appropriate comparator and finding the best color match. 


Molybdate Instructions

Catechol Tech Sheet

Molybdate Information


WARNING! This product can expose you to chemicals including catechol, which is known to the State of California to cause cancer. For more information go to www.P65Warnings.ca.gov.

More Information
Manufacturer CHEMetrics
Call For Price No
Gas Molybdate
4-20 mA Output No
Voltage Output None
Power Requirements 4 AAA Batteries
Datalogging No
Warranty 1 Year
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