Chlorine Dioxide Information


Chlorine Dioxide:

Other Names

Chloroperoxyl, chlorine peroxide, chlorine oxide

Chemical Formula


CAS Number


Industry Uses

Water Purification, Paper Manufacturing

Health Risks

Eye, throat, and airway irritation; pulmonary edema, death; skin burns; coughing, vomiting

Vapor Pressure

758 mmHg

Water Solubility

Highly Soluble




Sharp, Bleach-like

Chlorine Dioxide MSDS

What is Chlorine Dioxide:

Chlorine Dioxide is a reddish-yellow manufactured gas, with a faint bleach-like odor. When added to water chlorine dioxide forms a chlorite ion which is very reactive. Chlorine dioxide is used as a bleaching agent in paper manufacturing plants and in water purification facilities to make drinking water safe to consume. Liquid chlorine dioxide is a reddish-brown and must be under pressure or cooler temperatures to stay in liquid form. Chlorine dioxide is an oxidizer which may cause or intensify fire. Chlorine dioxide can explode if confined and heated under pressure. Chlorine dioxide is very dangerous, it is toxic if inhaled or swallowed and is a strong irritant.

Chlorine Dioxide Exposure and Health Risks:

Chlorine dioxide is a potent irritant to the eyes and skin. Severe burns and tissue damage is likely if direct contact occurs. Irritation to eyes, nose, throat, and airway is common, and excessive exposure can lead to bronchitis, wheezing, and pulmonary edema, which can result in death. Chlorine dioxide is toxic if inhaled or ingested, causing coughing, headaches, labored breathing, and pain. Chlorine dioxide targets the skin, nervous system, eyes, and respiratory system.


The table below summarizes the most-recent exposure limits.




0.15 ppm

AEGL-1 (8 hrs)


1.4 ppm

AEGL-2 (10 min)


0.45 ppm

AEGL-2 (8 hrs)


3.0 ppm

AEGL-3 (10 min)


0.98 ppm

AEGL-3 (8 hrs)


0.1 ppm

TWA (8 hrs)


0.3 ppm

Short Term Exposure Limit


0.1 ppm




Measuring Chlorine Dioxide:

Chlorine dioxide can be measured in the air or in water (dissolved) by units of parts per million (ppm). Many of our products have digital communication capabilities for easy monitoring and control. We carry portable, fixed, and dissolved chlorine dioxide monitors and kits, and all of our chlorine dioxide products can be viewed HERE.

What type of component are you looking for?

Fixed Mount Handheld Dissolved Kits:  Replacement Sensors: Calibration Gas:  Rentals: 

All sensors require a yearly calibration to ensure your gas measurements are accurate and performing within manufacturer standards. This page is desiccated to the individual manufacturers we represent and their specific calibration procedures. 

**Calibration Service Request Form **

Calibration Costs:

Calibration costs do vary, see below to get an estimate: 

Calibration Fee: $150

Analyzer Calibration Fee: $300

PM Calibration Sensor Fee: $330

Genie Calibration Fee: $265

ATI Calibration Fee: $205

** note that prices are subject to change per labor and parts required.

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