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Chloride Test Kits

Chloride 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.
20-200 ppm 20 ppm Mercuric Nitrate K-2020*
50-500 ppm 50 ppm Mercuric Nitrate K-2050*
250-2500 ppm 250 ppm Mercuric Nitrate K-2051*
1000-10,000 ppm 1000 ppm Mercuric Nitrate K-2055*
10,000-100,000 ppm 10,000 ppm Mercuric Nitrate K-2070*

Instrumental Kits

Range Method Kit Catalog No.
0-40.0 ppm Ferric Thiocyanate K-2103*


Chloride is the most common inorganic anion found in water and wastewater. The Maximum Secondary Contaminant Level for drinking water for chloride is 250 mg/L. Natural sources of salt are the ocean and various salt deposits above and below ground.

Chloride is very corrosive to most metals in systems with elevated pressures and temperatures such as boilers and oil-drilling equipment.

The Mercuric Nitrate Method

References: APHA Standard Methods, 23rd ed., Method 4500-Cl- C-1997. ASTM D 512-04, Chloride Ion in Water, Test Method A. USEPA Methods for Chemical Analysis of Water and Wastes, Method 325.3 (1983).
CHEMetrics employs a mercuric nitrate titrant in acid solution with diphenylcarbazone as the end point indicator in our Chloride in water test kits. Results are expressed as ppm (mg/L) Cl-.
The Ferric Thiocyanate Method

Reference: APHA Standard Methods, 23rd ed., 4500-Cl-E-1997. D. Zall, D. Fisher, M. Garner, “Photometric Determination of Chlorides in Water,” Analytical Chemistry, Vol 28, No. 11, pp. 1665-1668, November 1956. J. O’Brien, “Automatic Analysis of Chlorides in Sewage,“Wastes Engineering, pp. 670-672, December 1962.
The Chloride Vacu-vials® test employs the ferric thiocyanate chemistry. Chloride reacts with mercuric thiocyanate to liberate thiocyanate ion. Ferric ion reacts with thiocyanate ion to produce an orange-brown thiocyanate complex in proportion to the chloride concentration. Results are expressed as ppm (mg/L) Cl-.*Contains mercury. Dispose according to local, state or federal laws.