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Environmental fate & pathways

Phototransformation in air

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Description of key information

After evaporation or exposure to air, the test item (represented by its predominant compounds C13H29N, C23H49N, C26H55N and C29H61N) will be rapidly degraded by photochemical processes.

Key value for chemical safety assessment

Additional information

Di-tridecylamine, branched and linear (CAS 101012-97-9) is a mixture of (predominantly) di-alkyl amines with varying alkyl-chain length in a range between C13 and C29. The main fraction (81.2%) consists of di-tridecylamine (C26H55N; CAS 57157-80-9).

Using the EPISUITE model AOP v1.92 a degradation rate constant of 115.2 E-12 cm³/(molecule*sec) was estimated for C26H55N, based on a 24 -h day and an OH-radical concentration of 0.5 E06 OH/cm³. Following this, the substance is expected to be photodegraded by OH-radicals with a half-life of 0.139 d (BASF, 2011). Regarding the other compounds of the test item (CAS 101012 -97 -9), the range of the photodegradation half-life for molecules with a C-chain length between C13 and C29 is expected to be at a similar level (0.134 - 0.166 d for the C23 -C29 di-alkylamines and 0.340 d for the C13 mono alkyl amine). The substance is not stable when exposed to the atmosphere.

SMILES code

Mol. formula

CAS No.

OH rate constant [cm³/(molecule*sec)]
*E-12

DT50

[days]

NCCCCCCCCCCC(C)C

C13H29N1

35723-81-0

47.1222

0.340

C(C)(C)CCCCCCCCNCCCCCCCCCC(C)C

C23H49N1

-

111.0053

0.145

CC(C)CCCCCCCCCCNCCCCCCCCCCC(C)C

C26H55N1

57157-80-9

115.2444

0.139

CC(C)CCCCCCCCCCCCCCNCCCCCCCCCC(C)C

C29H61N1

-

119.4836

0.134