Alkenes, C11-12, hydroformylation products, low boiling

Phototransformation in soil

Administrative data

Endpoint:

phototransformation in soil

Type of information:

other: Technical discussion

Adequacy of study:

supporting study

Study period:

Not available

Reliability:

2 (reliable with restrictions)

Rationale for reliability incl. deficiencies:

other: Well documented discussion on substance properties

Data source

Reference

Reference 1

Reference Type:

publication

Title:

Rates of direct photolysis in the aqueous environment

Author:

Zepp, R., Cline, D.

Year:

1977

Bibliographic source:

Environmental Science and Technology 11: 359-366

Reference 2

Reference Type:

review article or handbook

Title:

Chapter 8. Rate of aqueous photolysis

Author:

Harris, J.C.

Year:

1982

Bibliographic source:

In: "Handbook of chemical property estimation methods", Lyman, W.J., Reehl, W.F., Rosenblatt, D.H., eds. McGraw-Hill Book Company, New York, USA

Reference 3

Reference Type:

review article or handbook

Title:

Handbook of property estimation methods for chemicals

Author:

Boethling, R., Mackay, D.

Year:

2000

Bibliographic source:

CRC Press, Boca Raton, FL, USA. CRC Press, Boca Raton, FL, USA

Materials and methods

Test guideline

Qualifier:

no guideline followed

Principles of method if other than guideline:

Technical discussion

Test material

Test material information

Constituent 1

Reference substance name:

Hydrocarbons, C11-C14, n-alkanes, isoalkanes, cyclics, aromatics (2-25%)

EC Number:

925-653-7

Molecular formula:

None available- not a single isomer

IUPAC Name:

Hydrocarbons, C11-C14, n-alkanes, isoalkanes, cyclics, aromatics (2-25%)

Applicant's summary and conclusion

Validity criteria fulfilled:

not specified

Conclusions:

The substance does not exhibit any potential to undergo phototransformation in soil.

Executive summary:

The direct photolysis of an organic molecule occurs when it absorbs sufficient light energy to result in a structural transformation. The absorption of light in the ultra violet (UV) -visible range, 110-750 nm, can result in the electronic excitation of an organic molecule. The stratospheric ozone layer prevents UV light of less than 290 nm from reaching the earth's surface. Therefore, only light at wavelengths between 290 and 750 nm can result in photochemical transformations in the environment.

A conservative approach to estimating a photochemical degradation rate is to assume that degradation will occur in proportion to the amount of light wavelengths >290 nm absorbed by the molecule. Hydrocarbons, C9-C14, n-alkanes, isoalkanes, cyclics, contains hydrocarbon molecules that absorb UV light below 290 nm, a range of UV light that does not reach the earth's surface. Therefore, this substance does not have the potential to undergo photolysis in water and soil, and this fate process will not contribute to a measurable degradative loss of this substance from the environment.