Name: Chlorine Dioxide CAS#10049-04-4
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Chlorine Dioxide CAS#10049-04-4

Chlorine Dioxide CAS#10049-04-4
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Chemical Name：Chlorine Dioxide
CAS No.:10049-04-4
Molecular Formula：ClO2
Sample: Available
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Chlorine Dioxide CAS#10049-04-4

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.

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)

Safety Information

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

Wood-pulp bleaching is the largest use of chlorine dioxide, which is a uniquely selective oxidizer for lignin. In general, the trend in the pulp industry has been to eliminate chlorine and hypochochlorite as bleaching agents and replace them with chlorine dioxide.

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