CHLORINE DIOXIDE†

Chemical Identification
CAS # 10049-04-4
Formula

ClO₂

Synonyms

chlorine oxide; chlorine peroxide

Physical Properties
Physical description Yellow to red gas or a red-brown liquid (below 52°F) with an unpleasant odor similar to chlorine and nitric acid.
Boiling point 52°F Molecular weight 67.5
Freezing point/melting point -74°F Vapor pressure >1 atm
Flash point Vapor density 2.33
Specific gravity 1.6 (liquid at 32°F) Ionization potential 10.36 eV
Lower explosive limit (LEL) Upper explosive limit (UEL)
NFPA health rating NFPA fire rating
NFPA reactivity rating NFPA special instruction
Vapor hazard ratio (VHR)
Historical exceedance percentage
Target organs
Monitoring Methods Used by OSHA
Analyte code (IMIS no.) 0614
Sampling group
Sampler/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) - Chlorine Dioxide Sampling Solution [SLTC111SOL]
Sampling time*

240 min

Sampling volume (TWA)*

120 L

Sampling flow rate (TWA)*

0.5 L/min

Sampling volume (STEL/Peak/C)*

7.5 L

Sampling flow rate (STEL/Peak/C)*

0.5 L/min

Analytical method instruments IC
Method reference OSHA ID-202 (fully validated)
Notes
Special requirements

These media are prepared by SLTC as needed and are not available for immediate shipment. Please allow time for SLTC to prepare these media prior to sampling.

* All sampling instructions above are recommended guidelines for OSHA Compliance Safety and Health Officers (CSHOs), please see the corresponding OSHA method reference for complete details.

Wipe Method
Sampler/Sampling media
Bulk Method
Bulk Method
On-Site Screening Techniques
Device Detector tube Detector tube Detector tube
Model/Type Gastec 8LA Matheson-Kitagawa 8014-116 Dräger - CH24301
Sampling information
(see manufacturer instructions)
0.33-16 ppm range 1-20 ppm range 0.1-1.5 ppm
Exposure Limits
OSHA PEL
8-hour TWA
(ST) STEL
(C) Ceiling
Peak
NIOSH REL
Up to 10-hour TWA
(ST) STEL
(C) Ceiling
ACGIH TLV©
8-hour TWA
(ST) STEL
(C) Ceiling
CAL/OSHA PEL
8-hour TWA
(ST) STEL
(C) Ceiling
Peak
PEL-TWA

0.1 ppm (0.3 mg/m³)

REL-TWA

0.1 ppm (0.3 mg/m³)

TLV-TWA PEL-TWA

0.1 ppm (0.3 mg/m³)

PEL-STEL REL-STEL

0.3 ppm (0.9 mg/m³)

TLV-STEL PEL-STEL

0.3 ppm (0.9 mg/m³)

PEL-C REL-C TLV-C

0.1 ppm [2017]

PEL-C
Skin notation

N

Skin notation

N

Skin notation

N

Skin notation

N

Notes:

See 29 CFR 1910.1000 Table Z-1.

Notes: Notes: Notes:
Health factors:  See NIH-NLM PubChem. IDLH

5 mg/m³

Carcinogenic classifications: Notes:
AIHA emergency response planning guidelines - ERPG-1/ERPG-2/ERPG-3:

--/0.5 ppm/3 ppm

Last Updated Date : 12/21/2020