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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Environmental fate & pathways

Phototransformation in air

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Administrative data

Link to relevant study record(s)

Reference
Endpoint:
phototransformation in air
Type of information:
calculation (if not (Q)SAR)
Remarks:
estimated by calculation
Adequacy of study:
key study
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: Accepted calculation method.
Principles of method if other than guideline:
Calculated with AOP Program v1.92 of EPI-Suite Software. The Atmospheric Oxidation Program (AOPWIN) estimates the rate constant for the atmospheric, gas-phase reaction between photochemically produced hydroxyl radicals and organic chemicals. The rate constants are then used to calculate atmospheric half-lives for organic compounds based upon average atmospheric concentrations of hydroxyl radicals and ozone.
GLP compliance:
no
Estimation method (if used):
PHOTOCHEMICAL REACTION WITH OH RADICALS
- sensitiser for indirect photolysis: OH radicals
- Concentration of OH radicals: 0.5 E6 OH/cm³, 24 h/d
% Degr.:
50
DT50:
1.7 h

A 24-hour day and an OH radical concentration of 0.5 E06 OH/cm³ are assumed for the calculation.

Executive summary:

In the atmosphere a half-life of 1.7 h for N-(1,4-dimethylpentyl)-N'-phenylbenzene-1,4-diamine is estimated due to indirect photolysis reaction with hydroxyl radicals, considering an OH-concentration of 500,000 radicals/cm³ as a 24-h average.

Description of key information

In the atmosphere a half-life of 1.7 h for N-(1,4-dimethylpentyl)-N'-phenylbenzene-1,4-diamine is estimated due to indirect photolysis reaction with hydroxyl radicals, considering an OH-concentration of 500,000 radicals/cm³ as a 24-h average.

Key value for chemical safety assessment

Half-life in air:
1.7 h

Additional information