ClO2 - Chlorine Dioxide, CAS# 10049-04-4

This yellowish-green gas crystallizes as bright orange crystals at -59 °C. As one of several oxides of chlorine, it is a potent and useful oxidizing agent used in water treatment and in bleaching.
 

Detailed Description

Health Effects:At gas-phase concentrations greater than 30% volume in air at STP (more correctly: at partial pressures above 10 kPa), ClO2 may explosively decompose into chlorine and oxygen. The decomposition can be initiated by, for example, light, hot spots, chemical reaction, or pressure shock. Thus, chlorine dioxide gas is never handled in concentrated form, but is almost always handled as a dissolved gas in water in a concentration range of 0.5 to 10 grams per liter. Its solubility increases at lower temperatures, thus it is common to use chilled water (5 °C, or 41 °F) when storing at concentrations above 3 grams per liter. In many countries, such as the USA, chlorine dioxide gas may not be transported at any concentration and is almost always produced at the application site using a chlorine dioxide generator. In some countries, chlorine dioxide solutions below 3 grams per liter in concentration may be transported by land, however, they are relatively unstable and deteriorate quickly.
Short Term Exposure Limit (STEL) – 0.3 PPM
Time Weighted Average (TWA) – 0.1 PPM
Immediately Dangerous to Life or Health (IDLH) – N/A
Lower Explosive Limit (LEL) – N/A
CAS # - 10049-04-4
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