CAS#10049-04-4 Chlorine Dioxide Products Description
With a molecular weight of 67.45 and the chemical formula ClO₂, chlorine dioxide (CAS#10049-04-4) is an inorganic molecule with potent oxidizing capabilities. It appears as a yellowish-green to orange-yellow gas with a strong, overpowering smell at normal temperature and pressure conditions. It appears as a reddish-brown solution when it is liquid and as orange-red crystals when it is solid.
Because pure chlorine dioxide gas can explode when its concentration rises above 10%, it is typically employed in stabilized chlorine dioxide solutions or produced on-site for safer and more useful uses.
Chlorine dioxide Chemical Properties
| Melting point | -59°C |
| Boiling point | 11°C |
| density | 3.09g/L |
| vapor pressure | 0-22900Pa at 20-25℃ |
| solubility | slightly soluble in H2O |
| form | orange-green gas |
| color | orange-green |
| Water Solubility | Soluble ºC |
| Exposure limits | TLV-TWA 0.1 ppm (0.3 mg/m3); (ACGIH, MSHA, OSHA, and NIOSH); TLV-STEL 0.3 ppm (ACGIH); IDLH 10 ppm (NIOSH). |
| Dielectric constant | 1.7（77.0℃） |
| Stability: | May decompose explosively on shock, friction or concussion, or on heating rapidly. Strong oxidant - reacts violently with combustible and reducing materials, and with mercury, ammonia, sulphur and many organic compounds. |
| LogP | -3.22--2.9 at 20℃ |
| CAS DataBase Reference | 10049-04-4(CAS DataBase Reference) |
| NIST Chemistry Reference | Chlorine dioxide(10049-04-4) |
| EPA Substance Registry System | Chlorine dioxide (10049-04-4) |
| Hazard Codes | O,T+,N |
| Risk Statements | 6-8-26-34-50 |
| Safety Statements | 23-26-28-36/37/39-38-45-61 |
| OEB | C |
| OEL | TWA: 0.1 ppm (0.3 mg/m3), STEL: 0.3 ppm (0.9 mg/m3) |
| RIDADR | UN 9191 |
| Hazardous Substances Data | 10049-04-4(Hazardous Substances Data) |
| IDLA | 5 ppm |
Product Usage
Chlorine dioxide is most commonly used in wood pulp bleaching, where it functions as a highly selective oxidizing agent to remove lignin. Due to its higher selectivity and efficacy, chlorine dioxide is increasingly being used in the pulp and paper sector to replace conventional bleaching chemicals like chlorine and hypochlorite.
