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Chlorine Dioxide

Chlorine Dioxide
CAS No.:10049-04-4
Molecular Formula: ClO2
Molecular Weight: 67.45
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Product Introduction

Chlorine Dioxide (CAS# 10049-04-4), with the molecular formula ClO₂ and a molecular weight of 67.45. Under normal temperature and pressure, it appears as a yellowish-green to orange-yellow gas with a pungent odor. In liquid form, it is a reddish-brown liquid, and in solid form, it is an orange-red crystal. Because pure gas concentration exceeding 10% is prone to explosion, it is mostly applied in the form of stable chlorine dioxide solution or on-site preparation.


CHEMICAL PROPERTIES

PropertyValue
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)


SAFETY INFORMATION

PropertyValue
Hazard CodesO,T+,N
Risk Statements6-8-26-34-50
Safety Statements23-26-28-36/37/39-38-45-61
OEBC
OELTWA: 0.1 ppm (0.3 mg/m3), STEL: 0.3 ppm (0.9 mg/m3)
RIDADRUN 9191
Hazardous Substances Data10049-04-4(Hazardous Substances Data)
IDLA5 ppm


PRODUCT USAGE

Chlorine dioxide is a highly effective, broad-spectrum, and safe oxidizing disinfectant, classified as an A1-level disinfectant by the World Health Organization (WHO). In water treatment, it is widely used for sterilization and disinfection of drinking water, swimming pool water, and industrial recirculating cooling water, effectively killing bacteria, viruses, and spores while producing almost no harmful byproducts such as trihalomethanes. In the food industry, it is used for fruit and vegetable preservation, as well as for cleaning and disinfecting processing equipment and packaging materials. In medical and public health fields, it can be used for air purification and surface sterilization. Additionally, it is used as a bleaching agent in the pulp and textile industries, offering advantages of high brightness and low degradation.

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