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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

Diss Factsheets

Administrative data

Endpoint:
phototransformation in air
Type of information:
calculation (if not (Q)SAR)
Remarks:
Migrated phrase: estimated by calculation
Adequacy of study:
key study
Study period:
2013
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: calculation by EPIWIN 4.1

Data source

Reference
Reference Type:
other: calculation program
Title:
EPIWIN 401
Author:
Syracuse Research Corp. Syracuse NY
Year:
2012
Bibliographic source:
US Environmental protection Agency 2000-2012

Materials and methods

Test guideline
Qualifier:
according to guideline
Guideline:
other: Estimation using APOWIN v1.92 in EPIWIN 3.05
GLP compliance:
not specified

Test material

Constituent 1
Chemical structure
Reference substance name:
2,5-dichlorophenol
EC Number:
209-520-4
EC Name:
2,5-dichlorophenol
Cas Number:
583-78-8
Molecular formula:
C6H4Cl2O
IUPAC Name:
2,5-dichlorophenol
Constituent 2
Reference substance name:
Phenol, 2,5-dichloro-
IUPAC Name:
Phenol, 2,5-dichloro-

Study design

Light source:
other: calculated

Results and discussion

Degradation rate constant
Reaction with:
OH radicals
Rate constant:
0 cm³ molecule-1 s-1

Applicant's summary and conclusion

Executive summary:

The rate of indirect photolysis in Air via Hydroxyl radicals is estimated by calculation = 6.9851 E-12 cm3/molecule*sec.

Half life 1.531 days, calculated 12 h a day.

Moreover 2,5-Dichlorophenol contains chromophores that absorb at wavelengths >290 nm and therefore may be susceptible to direct photolysis by sunlight. (HSDB)