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Chlorine Dioxide (ClO2)

Health Effects
Chlorine dioxide exposure can irritate the nose and throat, causing coughing and chest pain; eye irritation, irritate the lungs causing coughing and/or shortness of breath. Higher exposures can cause a build-up of fluid in the lungs (pulmonary oedema), with severe shortness of breath and possibly death.
RTECS Description:   Mutagen, Reproductive Effector, Primary Irritant
Carcinogenicity:          IARC/NTC Not listed as carcinogenic

Exposure Limits:
ACGIH:          TWA =            0.1 ppm; STEL = 0.3 ppm
NIOSH           REL =                         0.1 ppm, STEL 0.3 ppm
IDLH =           5 ppm
OSHA:            PEL =              0.1 [29 CFR 1910.1000, Table Z-1]

Steri-Trac® ClO2 Monitor
Availability:                            Special order
Specifications:
Sensor Type:               Electrochemical
Range:                         0 – 1 ppm
Resolution:                  0.01 ppm
Temp Range:               -20 to +40 oC
Response time (t50):     <20 (4 min exposure time)

Properties and Applications:
Chlorine dioxide is a strong oxidant and finds application as a bleaching agent, especially in pulp & paper and disinfection of drinking water, biocide and sterilant gas. Due to its reactivity, chlorine dioxide is almost always generated at the site of use.


Physical Properties:
Chemical Formula:      ClO2
Physical form:             reddish yellow gas
MP:                             -59.5 oC
BP:                              11 oC
pKa:                            2.5 – 3.5
MW:                            67.45 g/mol
Rel. Gas Density:        2.3 (Air = 1)
Odor threshold            9.2 ppm


Classification Numbers:
CAS No.:                    10049-04-4
EC No.:                       233-162-8
RTECS:                       FO3000000


 

*Specifications subject to change