Reaction mass of 1,3-dichloropropene and 2-chloropropane and 2-chloropropene and 3-chloropropene

Phototransformation in air

Administrative data

Endpoint:

phototransformation in air

Type of information:

migrated information: read-across from supporting substance (structural analogue or surrogate)

Adequacy of study:

key study

Reliability:

2 (reliable with restrictions)

Rationale for reliability incl. deficiencies:

other: The studies were performed in accordance with methods developed by the California Statewide Air Pollution Reserach Center (SAPRC) and also in cooperation with the US Environmental Protection Agency. It was not conducted according to GLP.

Data source

Reference

Reference Type:

publication

Title:

Unnamed

Year:

1987

Materials and methods

Test guideline

Qualifier:

equivalent or similar to guideline

Guideline:

EPA OPPTS 835.2310 (Maximum Direct Photolysis Rate in Air from UV/Visible Spectroscopy)

GLP compliance:

no

Test material

Test material information

Constituent 1

Reference substance name:

3-chloropropene

EC Number:

203-457-6

EC Name:

3-chloropropene

Cas Number:

107-05-1

Molecular formula:

C3H5Cl

IUPAC Name:

3-chloroprop-1-ene

Constituent 2

Reference substance name:

. 203-457-6

IUPAC Name:

. 203-457-6

Details on test material:

As per the IUCLID5 Sections 1.1. - 1.4. for 3-chloropropene.

Specific details on test material used for the study:

Details on properties of test surrogate or analogue material (migrated information):
As per the IUCLID5 Sections 1.1. - 1.4. for 3-chloropropene.

Study design

Light source:

Xenon lamp

Light spectrum: wavelength in nm:

ca. 290 - ca. 900

Details on test conditions:

The tests were performed at room temperature in evacuable Teflon-coated or all-Teflon environmental chambers or reaction bags. The 3-chloropropene concentrations for studies on reaction with O3 were 2.13, 4.78, 7.24 and 9.73e-14 molecules per cm3. Ethene was used as the reference substance in the experiments for the investigation of the reaction with NO3. The reaction with OH radical was studied with propene as the reference substance. The initial concentrations of the reactants were 2.4e14 molecules of CH3ONO per cm3, 1.2 to 2.4 e14 molecules of NO per cm3, 3.8 to 4.8 e14 molecules of allyl chloride per cm3 and 3.6 to 4.8e14 molecules of propene per cm3.

Reference substance:

yes

Remarks:

Ethene and propene.

Results and discussion

Dissipation half-life of parent compound

Dissipation half-life of parent compound 1

DT50:

1.4 d

Test condition:

OH radical

Dissipation half-life of parent compound 2

DT50:

10 d

Test condition:

O3 reaction

Dissipation half-life of parent compound 3

DT50:

160 d

Test condition:

NO3 radical reaction

Results with reference substance:

Decayed as expected.

Applicant's summary and conclusion

Validity criteria fulfilled:

yes

Conclusions:

The experiments performed with 3-chloropropene indicated that reaction with photolytically produced OH radical is the main process of removal of the substance from the atmosphere with an experimentally determined half-life of 1.4 days. Reaction with ozone was less important with a half-lfe of 10 days. Reaction with NO3 radical was negligible with a half-life of 160 days

Executive summary:

3 -chloropropene is primarily degraded in the atmosphere by reaction with OH radical with a half-life of approximately 1.4 days.