K-7004 Nitrite

K-7004 Nitrite Kit was designed to obtain Nitrite levels from 0-2.5 ppm

Replacement ampoules for the K-7004 Test Kit can be found here.


Why Choose CHEMetrics Chemets kits?

CHEMetrics Chemets self-filing reagent ampoules are a great way to test for dissolved substances in liquids. These visual test kits allow you to obtain results by measuring the color of the sample according to the color comparators provided with the kit. This unique method allows you to attain results quickly and accurately with minimal contact with potentially hazardous materials.

Safe and Reliable Results

While traditional methods often require multiple steps and thorough preparation, these test kits allow you to obtain dependable results with a few simple steps. By simplifying the testing method, Chemets test kits reduce the potential for operator error. Additionally, each of the ampoules contained in the test kits is vacuum sealed which helps eliminate the problem of obtaining inaccurate results from stale or unstable reagents. These reagents are stored right in the tip of each ampoule and sealed in glass, thereby minimizing direct contact with the chemicals.

What's included:

  • 30 self-filling Ampoules
  • Comparator 
  • 1 25 mL Sample Cup
  • Instruction Manual


The K-7004 Nitrite Kit was designed to accurately measure the levels of Nitrite in water from 0-2.5 ppm. K-7004 uses the Azo Dye Formation Method. Nitrite diazotizes with a primary aromatic amine in an acidic solution to produce a highly colored azo dye. The intensity of the color is directly proportional to the concentration of nitrite in the sample. Nitrate will not interfere. Results are expressed as ppm (mg/L) NO2-N. 

Nitrite, an intermediate in the nitrogen cycle, is formed during the decomposition of organic matter but readily oxidizes to form nitrate. These processes occur in wastewater treatment plants, water distribution systems, and natural waters. Nitrites are useful as corrosion inhibitors, preservatives, pigments, and in manufacturing many organic preservative chemicals. A Maximum Contaminant Level of 1 mg/L has been established by the USEPA for nitrite-nitrogen in drinking water. 

Shelf-life: The refill and color comparator contained in this kit have shelf-lives of 12 months


1. Fill the sample cup to the 25 mL mark with the sample to be tested. Add 2 drops of Stabilizer Solution. Stir to mix the contents of the cup. 2. Place the ampoule tip-first into the sample cup. Snap the tip and the ampoule will automatically fill.
3. To mix the ampoule, tilt it from side to side, allowing the bubble to travel from end to end. 4. Dry the ampoule.
5. Wait 10 minutes for color development.  6. To obtain results, place the ampoule between the color standards, moving it along the comparator until you can determine the closest match.

For more detailed instructions, see the link at the bottom of the page.


WARNING! This product can expose you to chemicals including ethylene glycol, which is known to the State of California to cause birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

More CHEMetrics Kits for Nitrite

Product Number Method MDS Range Price
K7025 Ceric Sulfate Titrant with Ferroin Indicator 250 ppm 250-2500 ppm as NaNO2 $33.00
K7050 Ceric Sulfate Titrant with Ferroin Indicator 500 ppm 500-5000 ppm as NaNO2 $33.00
Product Number Method   Range Price
K7003 Azo Dye Formation   0-1.00 ppm as N $32.00
Chemets Kits
Product Number Method MDL Range Price
K7004 Azo Dye Formation 0.2 ppm 0-2.5 ppm as N $68.00
Product Number Method MDL Range Price
K7004D Azo Dye Formation 4 ppm 0-80 ppm as N $61.00
K7004A Azo Dye Formation 10 ppm  0-170 ppm as N $61.00
K7004B Azo Dye Formation 20 ppm 0-300 ppm as N $61.00
K7004C Azo Dye Formation 200 ppm 0-3000 ppm as N $62.00



K-7004 Instructions

Nitrite Tech Sheet

Nitrite Information

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