Chlorine dioxide

Melting point / freezing point

Link to relevant study record(s)

Reference

Reference 1

Endpoint:

melting point/freezing point

Data waiving:

study scientifically not necessary / other information available

Justification for data waiving:

other:

Reference 2

Endpoint:

melting point/freezing point

Type of information:

other: handbook data

Adequacy of study:

other information

Reliability:

4 (not assignable)

Rationale for reliability incl. deficiencies:

documentation insufficient for assessment

Justification for type of information:

The information does not come from a test report, and the minimum fields required cannot be filled in. Data comes from a handbook cited among "reference books containing peer reviewed physico-chemical data" in the ECHA guidance document on information requirements (R7a). However documentation is considered as insufficient for assessment.

Reason / purpose for cross-reference:

reference to same study

Reason / purpose for cross-reference:

reference to other study

Principles of method if other than guideline:

No data.

Melting / freezing pt.:

-59 °C

Remarks on result:

other: Normal melting point.

Executive summary:

The peer-reviewed CRC Handbook of Chemistry and Physics provides a normal Melting Point of -59°C for the substance Chlorine dioxide.

Reference 3

Endpoint:

melting point/freezing point

Type of information:

other: secondary source

Adequacy of study:

other information

Reliability:

4 (not assignable)

Rationale for reliability incl. deficiencies:

documentation insufficient for assessment

Justification for type of information:

The information does not come from a test report, and the minimum fields required cannot be filled in. Data comes from a book dedicated to chlorine dioxide, compiling very numerous literature references, but few experimental details are provided (atmospheric pressure and details on the identity/composition of the test substance are not provided). Therefore it cannot be assigned as reliable.

Reason / purpose for cross-reference:

reference to same study

Principles of method if other than guideline:

No data.

GLP compliance:

not specified

Melting / freezing pt.:

-59 °C

Remarks on result:

other: (-74 °F)

ClO₂ exists as a solid below about -59°C.

Executive summary:

The Simpson's book, dedicated to chlorine dioxide, provides a melting point of -59°C. Atmospheric pressure and details on Identity / Composition of the substance not provided.

Reference 4

Endpoint:

melting point/freezing point

Type of information:

experimental study

Remarks:

reported in a publication

Adequacy of study:

other information

Reliability:

4 (not assignable)

Rationale for reliability incl. deficiencies:

documentation insufficient for assessment

Justification for type of information:

Melting point was observed when measuring vapour pressure, with a method that cannot be fully related to a recognised guideline, and the identity of the test substance is discussed. Therefore, documentation is considered as insufficient for assessment.

Reason / purpose for cross-reference:

reference to same study

Principles of method if other than guideline:

Melting point observed at a reduced pressure of 10 mm Hg from the vapour pressure measurement with a method based on static method principle.

Melting / freezing pt.:

214 K

Atm. press.:

10 mm Hg

Remarks on result:

other: corresponding to -59°C at 1333 Pa

Melting occured sharply at -59°C, both solid and liquid being at first present, and all the solid melted at this temperature.

Executive summary:

This publication deals with measurement of vapour pressure of chlorine dioxide, from melting point to boiling point. Melting was observed at 214K (-59°C), under the reduced pressure of 10 mm Hg (1333 Pa). Information on the identity/composition of the test substance are discussed.

Reference 5

Endpoint:

melting point/freezing point

Type of information:

other: secondary source

Adequacy of study:

other information

Reliability:

4 (not assignable)

Rationale for reliability incl. deficiencies:

documentation insufficient for assessment

Justification for type of information:

The information does not come from a test report, and the minimum fields required cannot be filled in (atmospheric pressure and details on the identity/composition of the substance not provided). Data comes from an online compilation and two toxicological profiles citing other data sources, and therefore cannot be assigned as reliable, even if the original data source is cited among "reference books containing peer reviewed physico-chemical data" in the ECHA guidance document on information requirements (R7a), and the data may be considered as peer reviewed.

Reason / purpose for cross-reference:

reference to same study

Reason / purpose for cross-reference:

reference to other study

Principles of method if other than guideline:

No data.

Melting / freezing pt.:

-59 °C

Executive summary:

The HSDB database, the ATSDR profile and the EPA IRIS review provide a peer-reviewed Melting Point of -59°C for the substance Chlorine dioxide, cited from the Merck Index handbook. However, atmospheric pressure and details on the identity/composition of the substance are not provided.

Reference 6

Endpoint:

melting point/freezing point

Type of information:

other: secondary source

Adequacy of study:

other information

Reliability:

4 (not assignable)

Rationale for reliability incl. deficiencies:

documentation insufficient for assessment

Justification for type of information:

Data comes from a review using secondary data sources and atmospheric pressure not reported. Therefore the data cannot be assigned as reliable.

Reason / purpose for cross-reference:

reference to same study

Principles of method if other than guideline:

No data.

Melting / freezing pt.:

-59 °C

Remarks on result:

other: atmospheric pressure not reported

Executive summary:

The international CICAD review provides a Melting Point of -59°C for the substance Chlorine dioxide. Atmospheric pressure and details on the identity/composition of the substance not provided.

Reference 7

Endpoint:

melting point/freezing point

Type of information:

other: secondary source

Adequacy of study:

other information

Reliability:

4 (not assignable)

Rationale for reliability incl. deficiencies:

documentation insufficient for assessment

Justification for type of information:

The information does not come from a test report, and the minimum fields required cannot be filled in. The reference cites only endpoint value as a secondary source, and therefore cannot be assigned as reliable(atmospheric pressure and details on the identity/composition of the substance not provided)

Reason / purpose for cross-reference:

reference to same study

Reason / purpose for cross-reference:

reference to other study

Principles of method if other than guideline:

No data.

Melting / freezing pt.:

-59 °C

Remarks on result:

other: gas

Executive summary:

This publication cites, as a secondary source, some physico-chemical properties for the substance chlorine dioxide, including a melting point of -59°C for the gas state.(atmospheric pressure and details on the identity/composition of the substance not provided)

Reference 8

Endpoint:

melting point/freezing point

Type of information:

other: secondary source

Adequacy of study:

other information

Reliability:

4 (not assignable)

Rationale for reliability incl. deficiencies:

documentation insufficient for assessment

Justification for type of information:

The information does not come from a test report, and the minimum fields required cannot be filled in. The reference cites only endpoint value as a secondary source, and therefore cannot be assigned as reliable.(atmospheric pressure and details on the identity/composition of the substance not provided)

Reason / purpose for cross-reference:

reference to same study

Reason / purpose for cross-reference:

reference to other study

Principles of method if other than guideline:

No data.

Melting / freezing pt.:

-59 °C

Remarks on result:

other: gas

ClO₂ freezes at -59°C forming a red, highly unstable liquid.

Executive summary:

This publication cites, as a secondary source, some physico-chemical properties for the substance chlorine dioxide, including a freezing point of -59°C. (atmospheric pressure and details on the identity/composition of the substance not provided)

Reference 9

Endpoint:

melting point/freezing point

Type of information:

other: secondary source

Adequacy of study:

other information

Reliability:

4 (not assignable)

Rationale for reliability incl. deficiencies:

documentation insufficient for assessment

Justification for type of information:

The information does not come from a test report, and the minimum fields required cannot be filled in, such as atmospheric pressure and details on the identity/composition of the substance. Data comes from a review citing other data sources, and therefore cannot be assigned as reliable. However, please note that the secondary source is considered as peer reviewed.

Reason / purpose for cross-reference:

reference to same study

Reason / purpose for cross-reference:

reference to other study

Principles of method if other than guideline:

No data.

Melting / freezing pt.:

-59 °C

Executive summary:

The OECD SIDS report provides a Melting Point of -59°C for the substance Chlorine dioxide, cited from the Kirk-Othmer encyclopedia, but atmospheric pressure and details on the identity/composition of the substance are not provided.

Reference 10

Endpoint:

melting point/freezing point

Type of information:

other: secondary source

Adequacy of study:

other information

Reliability:

4 (not assignable)

Rationale for reliability incl. deficiencies:

documentation insufficient for assessment

Justification for type of information:

Data comes from a sheet with no reference to data sources, and therefore cannot be assigned as reliable.(atmospheric pressure and details on identity/composition of the substance not provided).

Reason / purpose for cross-reference:

reference to same study

Principles of method if other than guideline:

No data.

Melting / freezing pt.:

-59 °C

Executive summary:

The ICSC provides a Melting Point of -59°C for the substance Chlorine dioxide.(atmospheric pressure and details on identity/composition of the substance not provided).

 

Description of key information

Solution of chlorine dioxine generated in-situ at less than 2% in water

(as registered): MP < = 0°C (close to the MP of water)

 

 

Key value for chemical safety assessment

Melting / freezing point at 101 325 Pa:

0 °C

Additional information

The substance as registered is always generated in situ as a gas dissolved in water, with concentration not exceeding 2%. No study was conducted to determine the melting/freezing point of the substance considering the melting /freezing point of the substance as very close to that of pure water, i.e. <=0°C. Therefore, a further assessment of the melting point is scientifically unjustified and this data is considered as key data for CSA purpose.

Other information : An experimental data reports the a value of 214 K (-59°C) at 10 mm Hg (1333 Pa) but composition of the substance is discussed. In addition, several literature data, mainly from different handbooks, provide the same value of -59°C for pure chlorine dioxide (gas). However, no information on atmospheric pressure and details on identity/composition of the test item were provided.