Chlorine dioxide |
Synonyms & Trade Names Chlorine oxide, Chlorine peroxide |
CAS No. 10049-04-4 |
RTECS No. FO3000000 |
DOT ID & Guide 9191 143 (hydrate, frozen) |
FormulaClO2 |
Conversion 1 ppm = 2.76 mg/m3 |
IDLH 5 ppm
See: 10049044 |
Exposure Limits NIOSH REL: TWA 0.1 ppm (0.3 mg/m3) ST 0.3 ppm (0.9 mg/m3)
OSHA PEL†: TWA 0.1 ppm (0.3 mg/m3) |
Measurement Methods
OSHA ID126SGX , ID202
See: NMAM or OSHA Methods |
Physical Description Yellow to red gas or a red-brown liquid (below 52°F) with an unpleasant odor similar to chlorine and nitric acid. |
MW: 67.5 |
BP: 52°F |
FRZ: -74°F |
Sol(77°F): 0.3% |
VP: >1 atm |
IP: 10.36 eV |
Sp.Gr: 1.6 (Liquid at 32°F) |
Fl.P: NA (Gas) ? (Liquid) |
UEL: ? |
LEL: ? |
RGasD: 2.33 |
|
| Flammable Gas/Combustible Liquid |
Incompatibilities & Reactivities Organic materials, heat, phosphorus, potassium hydroxide, sulfur, mercury, carbon monoxide [Note: Unstable in light. A powerful oxidizer.] |
Exposure Routes inhalation, ingestion (liquid), skin and/or eye contact |
Symptoms irritation eyes, nose, throat; cough, wheezing, bronchitis, pulmonary edema; chronic bronchitis |
Target Organs Eyes, respiratory system |
|
Personal Protection/Sanitation (See protection codes)
Skin: Prevent skin contact (liquid)
Eyes: Prevent eye contact (liquid)
Wash skin: When contaminated (liquid)
Remove: When wet (flammable)
Change: No recommendation
Provide: Eyewash (liquid), Quick drench (liquid) |
First Aid (See procedures)
Eye: Irrigate immediately (liquid)
Skin: Soap wash immediately (liquid)
Breathing: Respiratory support
Swallow: Medical attention immediately (liquid) |
Respirator Recommendations NIOSH/OSHA Up to 1 ppm:
(APF = 10) Any chemical cartridge respirator with cartridge(s) providing protection against the compound of concern
(APF = 10) Any supplied-air respirator Up to 2.5 ppm:
(APF = 25) Any supplied-air respirator operated in a continuous-flow mode£
(APF = 25) Any powered, air-purifying respirator with cartridge(s) providing protection against the compound of concern£ Up to 5 ppm:
(APF = 50) Any chemical cartridge respirator with a full facepiece and cartridge(s) providing protection against the compound of concern
(APF = 50) Any air-purifying, full-facepiece respirator (gas mask) with a chin-style, front- or back-mounted canister providing protection against the compound of concern
(APF = 50) Any self-contained breathing apparatus with a full facepiece
(APF = 50) Any supplied-air respirator with a full facepiece Emergency or planned entry into unknown concentrations or IDLH conditions:
(APF = 10,000) Any self-contained breathing apparatus that has a full facepiece and is operated in a pressure-demand or other positive-pressure mode
(APF = 10,000) Any supplied-air respirator that has a full facepiece and is operated in a pressure-demand or other positive-pressure mode in combination with an auxiliary self-contained positive-pressure breathing apparatus Escape:
(APF = 50) Any air-purifying, full-facepiece respirator (gas mask) with a chin-style, front- or back-mounted canister providing protection against the compound of concern¿
Any appropriate escape-type, self-contained breathing apparatus
Important additional information about respirator selection |
| See also: INTRODUCTION See ICSC CARD: 0127 See MEDICAL TESTS: 0045 |
