Resin acids and Rosin acids, ammonium salts

Endpoint summary

Description of key information

Stability:

Hydrolysis:

The hydrolysis half life at different  pH and rate constant of test chemical Resin acids and Rosin acids, ammonium salts was estimated by EPI  Suite (HydroWin). The Half life estimated at pH 7 was 172.497 days and at pH 8 half life was 17.250 days at temperature 25 oC. The rate Constant at pH > 8 was 0.4651 L/Mol/Sec  at 25 oC.Since, half life of hydrolysis of chemical Resin acids and Rosin acids, ammonium salts is more than 10 days it shows negligible hydrolysis in water.

Biodegradation:

Biodegradation in water:

Biodegradability of test chemical Resin acids and Rosin acids, ammonium salts (CAS no. 68649-89-8) is predicted using OECD QSAR tool box v3.3 using log Kow as primary descriptor. The test chemical Resin acids and Rosin acids, ammonium salts undergoes 72% biodegradation by considering BOD as parameter and microorganisms as inoculum in 28 days. Therefore it is concluded that test chemical Resin acids and Rosin acids, ammonium salts is readily biodegradable.

Bioaccumulation:

Bioaccumulation: aquatic/sediments:

Using BCFBAF Program (v3.00) model of EPI suite 2017 the estimated bio concentration factor (BCF) for Resin acids and Rosin acids, ammonium salts (CAS No. 68649-89-8) is 3.162 L/kg wet-wt at 25 deg. c which does not exceed the bioconcentration threshold of 2000. Therefore it is concluded that test chemical Resin acids and Rosin acids, ammonium salts is non bioaccumulative in food chain.

Transport and distribution:

Adsorption/desorption:

The Soil Adsorption Coefficient i.e. Koc value of test chemical Resin acids and Rosin acids, ammonium salts (CAS No. 68649-89-8) was estimated using EPI suite KOCWIN Program (v2.00) as 78660 L/kg (log Koc= 4.8958) by means of MCI method at 25 deg. C. This log Koc value indicates that test chemical Resin acids and Rosin acids, ammonium salts has very strong sorption to soil and therefore have negligible migration potential to ground water.

Additional information

Stability:

Hydrolysis:

The hydrolysis half life at different  pH and rate constant of test chemical Resin acids and Rosin acids, ammonium salts was estimated by EPI  Suite (HydroWin). The Half life estimated at pH 7 was 172.497 days and at pH 8 half life was 17.250 days at temperature 25 oC. The rate Constant at pH > 8 was 0.4651 L/Mol/Sec  at 25 oC.Since, half life of hydrolysis of chemical Resin acids and Rosin acids, ammonium salts is more than 10 days it shows negligible hydrolysis in water.

Biodegradation:

Biodegradation in water:

Predicted data for target compound Resin acids and Rosin acids, ammonium salts (CAS no. 68649-89-8) and supporting weight of evidence studies for its closest read across chemicals with log Kow as a primary descriptor were reviewed for the biodegradation endpoint which are summarized as below.

Biodegradability of test chemical Resin acids and Rosin acids, ammonium salts (CAS no. 68649-89-8) is predicted using OECD QSAR tool box v3.3 using log Kow as primary descriptor. The test chemical Resin acids and Rosin acids, ammonium salts undergoes 72 % biodegradation by considering BOD as parameter and microorganisms as inoculum in 28 days. Therefore it is concluded that test chemical Resin acids and Rosin acids, ammonium salts is readily biodegradable.

In a supporting weight of evidence study from authoritative database (J Check, 2017) for read across chemical 2-Ethylhexanoate; lead (2+) (CAS no. 301-08-6) biodegradation experiment was performed by taking activated sludge as inoculums at 30 mg/L concentration. Biodegradation was analysed by using BOD parameter. The initial concentration of read across chemical taken was 100 mg/L. The read across chemical 2-Ethylhexanoate; lead (2+) showed 98% biodegradation by BOD parameter in 28 days. Based on percent biodegradability it is concluded that read across chemical 2-Ethylhexanoate; lead (2+) is readily biodegradable.

In another supporting weight of evidence study from same source as mentioned above (J check, 2017) for read across chemical 2-Propanol, titanium (4+) salt (CAS no. 546-68-9) biodegradation test was carried out by taking sludge as inoculums at 30 mg/L concentration. Biodegradation was analysed by using BOD and TOC parameters. The initial concentration of read across chemical was 100 mg/L.The read across chemical 2-Propanol, titanium (4+) salt showed 87% biodegradation by BOD parameter and 97% biodegradation by TOC parameter in 28 days. Based on percent biodegradability it is concluded that read across chemical 2-Propanol, titanium(4+) salt is readily biodegradable.

On the basis of above results for target chemical Resin acids and Rosin acids, ammonium salts (CAS no. 68649-89-8) from OECD QSAR tool box v3.3, 2017 and for its read across substances (from authoritative database) the target chemical Resin acids and Rosin acids, ammonium salts can be expected to be readily biodegradable.

Bioaccumulation:

Bioaccumulation: aquatic/sediments:

Using BCFBAF Program (v3.00) model of EPI suite 2017 the estimated bio concentration factor (BCF) for Resin acids and Rosin acids, ammonium salts (CAS No. 68649-89-8) is 3.162 L/kg wet-wt at 25 deg. c which does not exceed the bioconcentration threshold of 2000. Therefore it is concluded that test chemical Resin acids and Rosin acids, ammonium salts is non bioaccumulative in food chain.

Transport and distribution:

Adsorption/desorption:

The Soil Adsorption Coefficient i.e. Koc value of test chemical  Resin acids and Rosin acids, ammonium salts (CAS No. 68649-89-8) was estimated using EPI suite KOCWIN Program (v2.00) as 78660 L/kg (log Koc= 4.8958) by means of MCI method at 25 deg. C. This log Koc value indicates that test chemical Resin acids and Rosin acids, ammonium salts has very strong sorption to soil and therefore have negligible migration potential to ground water.