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Environmental fate & pathways

Endpoint summary

Administrative data

Description of key information

Stability:

Hydrolysis:

The half life of hydrolysis of test chemical Reaction mass of 3H-Indolium, 2-[2-[4-[(2-cyanoethyl)methylamino]phenyl]ethenyl]-1,3,3-trimethyl- & acetate was estimated by using EPI suite (2018). The half life of hydrolysis of test chemical was estimated to be 16.3 days and 1.63 days at pH 7 and 8 respectively. On the basis of this half life value it can be concluded that test chemical Reaction mass of 3H-Indolium, 2-[2-[4-[(2-cyanoethyl)methylamino]phenyl]ethenyl]-1,3,3-trimethyl- & acetate

shows negligible to slow hydrolysis.

Biodegradation:

Biodegradation in water:

Estimation Programs Interface Suite (EPI suite, 2018) was run to predict the biodegradation potential of the test compound Reaction mass of 3H-Indolium, 2-[2-[4-[(2-cyanoethyl)methylamino]phenyl]ethenyl]-1,3,3-trimethyl- & acetate in the presence of mixed populations of environmental microorganisms. The biodegradability of the substance was calculated using seven different models such as Linear Model, Non-Linear Model, Ultimate Biodegradation Timeframe, Primary Biodegradation Timeframe, MITI Linear Model, MITI Non-Linear Model and Anaerobic Model (called as Biowin 1-7, respectively) of the BIOWIN v4.10 software. The results indicate that chemical Reaction mass of 3H-Indolium, 2-[2-[4-[(2-cyanoethyl)methylamino]phenyl]ethenyl]-1,3,3-trimethyl- & acetate is expected to be not readily biodegradable.

Transport and distribution:

Adsorption/desorption:

The Adsorption Coefficient of test substance Reaction mass of 3H-Indolium, 2-[2-[4-[(2-cyanoethyl)methylamino]phenyl]ethenyl]-1,3,3-trimethyl- & acetate was determined as per the HPLC method (OECD Guideline-121). The Log Koc value was determined to be 2.169 dimensionless at 25°C. Thus based on the result it is concluded that the test substance (Reaction mass of 3H-Indolium, 2-[2-[4-[(2-cyanoethyl)methylamino]phenyl]ethenyl]-1,3,3-trimethyl- & acetate has a low sorption to soil and sediment and therefore has moderate migration potential to ground water.

Additional information

Stability:

Hydrolysis:

The half life of hydrolysis of test chemical Reaction mass of 3H-Indolium, 2-[2-[4-[(2-cyanoethyl)methylamino]phenyl]ethenyl]-1,3,3-trimethyl- & acetate was estimated by using EPI suite (2018). The half life of hydrolysis of test chemical was estimated to be 16.3 days and 1.63 days at pH 7 and 8 respectively. On the basis of this half life value it can be concluded that test chemical Reaction mass of 3H-Indolium, 2-[2-[4-[(2-cyanoethyl)methylamino]phenyl]ethenyl]-1,3,3-trimethyl- & acetate

shows negligible to slow hydrolysis.

Biodegradation:

Biodegradation in water:

Predicted data study for target chemical Reaction mass of 3H-Indolium, 2-[2-[4-[(2-cyanoethyl)methylamino]phenyl]ethenyl]-1,3,3-trimethyl- & acetate and experimental studies for its structurally similar read across chemicals have been conducted and their results are summarized below for biodegradation endpoint.

 

The first weight of evidence study was predicted data study in this study Estimation Programs Interface Suite (EPI suite, 2018) was run to predict the biodegradation potential of the test compound  Reaction mass of 3H-Indolium, 2-[2-[4-[(2-cyanoethyl)methylamino]phenyl]ethenyl]-1,3,3-trimethyl- & acetate in the presence of mixed populations of environmental microorganisms. The biodegradability of the substance was calculated using seven different models such as Linear Model, Non-Linear Model, Ultimate Biodegradation Timeframe, Primary Biodegradation Timeframe, MITI Linear Model, MITI Non-Linear Model and Anaerobic Model (called as Biowin 1-7, respectively) of the BIOWIN v4.10 software. The results indicate that chemical  Reaction mass of 3H-Indolium, 2-[2-[4-[(2-cyanoethyl)methylamino]phenyl]ethenyl]-1,3,3-trimethyl- & acetate is expected to be not readily biodegradable.

Further, to support above predicted data study experimental study was reviewed from study report in this study the 28-days Closed Bottle test following the OECD guideline 301 D was performed to determine the ready biodegradability of the test item. The study was performed at a temperature of 20°C. The test system included control, test item and reference item. Polyseed were used for this study. 1 polyseed capsule were added in 500 ml D.I water and then stirred for 1 hour for proper mixing and functioning of inoculum. This gave the bacterial count as 107 to 108 CFU/ml. At the regular interval microbial plating was also performed on agar to confirm the vitality and CFU count of microorganism. The concentration of test and reference item (Sodium Benzoate) chosen for both the study was 4 mg/L, while that of inoculum was 32 ml/l. OECD mineral medium was used for the study. ThOD (Theoretical oxygen demand) of test and reference item was determined by calculation. % degradation was calculated using the values of BOD and ThOD for test item and reference item. The % degradation of procedure control (reference item) was also calculated using BOD & ThOD and was determined to be 73.49%. Degradation of Sodium Benzoate exceeds 31.32% on 7 days & 49.39 on 14th day. The activity of the inoculum is thus verified and the test can be considered as valid. The BOD28 value of test chemical was observed to be 0.52 mgO2/mg. ThOD was calculated as 2.44 mgO2/mg. Accordingly, the % degradation of the test item after 28 days of incubation at 20 ± 1°C according to Closed Bottle test was determined to be 21.31%. Based on the results, the test item, under the test conditions, was not readily biodegradable in nature.

Last weight of evidence study was also experimental study reviewed from chemosphere journal in this study the aerobic biodegradation experiment was performed for test chemical using activated sludge at concentration 0.5 g/L dry material as inoculums and initial concentration of chemical taken was 100 mg/L for 42 days. By considering DOC removal parameter test chemical showed 16 % degradation in 42 days. The test chemical belongs to D category according to table 1 and 2 as its limit value falls in that range. This percentage value is very less therefore it is concluded that test chemical is not readily biodegradable.

By considering results of all above mentioned study it can be concluded that test chemical Reaction mass of 3H-Indolium, 2-[2-[4-[(2-cyanoethyl)methylamino]phenyl]ethenyl]-1,3,3-trimethyl- & acetate is expected to be not readily biodegradable.

Transport and distribution:

Adsorption/desorption:

The adsorption coefficient Koc in soil and in sewage sludge of test chemical Reaction mass of 3H-Indolium, 2-[2-[4-[(2-cyanoethyl)methylamino]phenyl]ethenyl]-1,3,3-trimethyl- & acetate was determined by the Reverse Phase High Performance Liquid Chromatographic method according to OECD Guideline No. 121 . The reference substances were chosen according to functional similarity with the test substance and calibration graph prepared. The reference substances were methylaniline(p-Tolouidine), N-methylaniline, Aniline, Xylene, Ethylbenzene, Toluene, Naphthalene having Koc value ranging from 1.9 to 2.75.The Log Koc value was determined to be 2.169 dimensionless at 25°C.

Thus based on the result it is concluded that the test substance Reaction mass of 3H-Indolium, 2-[2-[4-[(2-cyanoethyl)methylamino]phenyl]ethenyl]-1,3,3-trimethyl- & acetate has a low sorption to soil and sediment and therefore has moderate migration potential to ground water.