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Environmental fate & pathways

Phototransformation in air

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Administrative data

Endpoint:
phototransformation in air
Type of information:
(Q)SAR
Adequacy of study:
disregarded due to major methodological deficiencies
Study period:
2008
Reliability:
4 (not assignable)
Rationale for reliability incl. deficiencies:
other: see 'Remark'
Remarks:
Derived using calculation method software. Current versions of EPIWIN, (Estimations Programs Interface for Windows) developed jointly by the Syracuse Research Corporation and the US Environmental Protection Agency, have not been validated for salts or chemicals that are of variable composition. This substance is a complex mixture comprising a number of molecules of varying structure with a distribution of carbon chain lengths with varying numbers of alkyl-phenol rings and sulfur bridging between those alkyl-phenol rings. As such the calculated value presented is based upon a theoretical structure and results are not considered to be representative of the values that would be predicted for the substance as a whole. As such the estimated values derived from the EPIWIN models have been disregarded for this submission as they are not considered to add any meaningful information to the data presented.
Justification for type of information:
QSAR prediction: migrated from IUCLID 5.6

Data source

Reference
Reference Type:
other: estimation model
Title:
Unnamed
Year:
2008

Materials and methods

Test guideline
Guideline:
other: REACH guidance on QSARS R.6, 2008
GLP compliance:
no
Remarks:
not applicable

Test material

Reference
Name:
Unnamed
Type:
Constituent
Details on test material:
122384-87-6 (mono-sulfur derivative)/68784-26-9/122384-86-5/68784-25-8
Phenol, tetrapropenyl-, sulfurized, carbonates, calcium salts, overbased
- Molecular formula: C36 H58 O10 S1 Ca4
- Molecular weight: 867.25
- Smiles notation: CC(C)CC(C)CC(C)CC(C)c1cc(Sc2cc(C(C)CC(C)CC(C)CC(C)C)ccc2O[Ca]OC(=O)(O[Ca]O))c(O[Ca]OC(=O)(O[Ca]O))cc1
- Physical state: solid
- Other: mono-sulfur derivative

Study design

Estimation method (if used):
PHOTOCHEMICAL REACTION WITH OH RADICALS
- Concentration of OH radicals: 1.5E6 OH/cm3 - 12 hour day
- Degradation rate constant: 83.3113e-12 cm3/molecule-sec
- Computer programme: AOPWIN V1.91 (EPIWIN V3.12)
- Other: Half-Life = 1.541 hours

Light source:
not specified

Results and discussion

Dissipation half-life of parent compound
DT50:
1.541 h

Applicant's summary and conclusion

Validity criteria fulfilled:
not specified
Conclusions:
EPISuite - AOPWIN version 1.91 estimates the half life to be 1.541 hours for the mono-sulfur derivative of the test material.
Executive summary:

EPISuite - AOPWIN version 1.91 estimates the half life to be 1.541 hours for the mono-sulfur derivative of the test material.