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Chemical Sampling Information (CSI)
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General Description

OSHA IMIS Code Number: 0614

Chemical Abstracts Service (CAS) Registry Number: 10049-04-4

NIOSH Registry of Toxic Effects of Chemical Substances (RTECS) Identification Number: FO3000000

Department of Transportation Regulation Number (49 CFR 172.101) and Guide: 9191 47

NIOSH Pocket Guide to Chemical Hazards, Chlorine dioxide: chemical description, physical properties, potentially hazardous incompatibilities, and more

Chemical Description and Physical Properties:

yellow-green to orange gas or liquid with a pungent, sharp odor
molecular weight: 68
vapor pressure: >1 atm
boiling point 52°F
melting point -74°F

Incompatabilities: Combustible substances, dust, organic matter, sulfur

Exposure Limits

OSHA Permissible Exposure Limit (PEL):

General Industry: 0.1 ppm, 0.3 mg/m3

Construction Industry: 0.1 ppm, 0.3 mg/m3 TWA

American Conference of Governmental Industrial Hygienists (ACGIH) Threshold Limit Value (TLV): 0.1 ppm, 0.28 mg/m3 TWA; 0.3 ppm, 0.83 mg/m3 STEL

National Institute for Occupational Safety and Health (NIOSH) Recommended Exposure Limit (REL): 0.1 ppm TWA; 0.3 ppm STEL

Health Factors

Potential Symptoms: Eye, nose, throat irritation; coughing, wheezing, bronchitis; pulmonary edema; chronic bronchitis

Health Effects: Lung injury (HE11) irritation-eyes, nose, throat, skin---marked (HE14)

Affected Organs: Respiratory system, eyes

Monitoring Methods used by OSHA

Primary Laboratory Sampling/Analytical Method (SLC1):

  • sampling media: Midget Fritted Glass Bubbler (MFGB) containing 15 mL of 0.02% Potassium Iodide in a buffer mixture of Sodium Carbonate and Sodium Bicarbonate (1.5 mM of each)
    maximum volume 120.0 liters
    maximum flow rate: 0.5 L/min (TWA)
    maximum volume 7.5 liters
    maximum flow rate: 0.5 L/min (STEL)
    current analytical method: Ion chromatography
    method reference: 2 (OSHA ID-202)
    sampling and analytical error: 0.13
    method classification: Fully Validated

  • sampling media: Two Midget Impingers (each containing 15 mL of 9.46 x 10-6 M Chlorophenol Red solution) in series, preceded by a Silica Gel Tube (100/50 mg sections) impregnated with Sulfamic acid and Sodium hydroxide
    maximum volume 30.0 liters
    maximum flow rate: 0.2 L/min (TWA)
    maximum volume: 4.5 liters
    maximum flow rate: 0.3 L/min (STEL)
    current analytical method: Colorimetric
    method reference: NIOSH Research Report for Chlorine Dioxide May 1982 Contract No. 210-80-0067. U.S. Dept Health and Human Services; NIOSH Division of Physical Sciences & Engineering, Cincinnati, OH.
    method classification: Not Validated
    note: Submit as a separate sample

Secondary Laboratory Sampling/Analytical Method (SAM2):

  • device: Detector Tube
    company: Gastec
    part #: 8La
    range:     0.33-16 ppm
    class: Mfg

  • device: Detector Tube
    company:     MSA
    part #: 82399
    range: 0.05-15 ppm
    class: Mfg

  • device: Detector Tube
    company:     Kitagawa
    part #: 116
    range: 1-20 ppm
    class: Mfg

  • device: Detector Tube
    company:     Draeger
    part #: CH 24301
    range: 0.1-1.5 ppm
    class: Mfg

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