Registration Dossier
Registration Dossier
Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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.
Use of this information is subject to copyright laws and may require the permission of the owner of the information, as described in the ECHA Legal Notice.
EC number: 269-944-0 | CAS number: 68391-32-2
Endpoint summary
Administrative data
Description of key information
Biodegradation in water
A 28-days Closed Bottle test following the OECD guideline 301 D to determine the ready biodegradability of[8-[(4-amino-3-nitrophenyl)azo]-7-hydroxy-2-naphthyl]trimethylammonium chloride(CAS No.68391-32-2) .The test system included control, test item and reference item. 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. 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 BOD28 value of [8-[(4-amino-3-nitrophenyl)azo]-7-hydroxy-2-naphthyl]trimethylammonium chloride(CAS No.68391-32-2) was observed to be 0.42 mgO2/mg. ThOD was calculated as 1.47 mgO2/mg. Accordingly, the % degradation of the test item after 28 days of incubation at 20 ± 1°C according to Closed Bottle test was found to be 28.57%. Based on the results, the test item, under the test conditions, was considered to be primary inherently biodegradable.
Biodegradation in water and sediment
Estimation Programs Interface (EPI) Suite (2017) prediction model was run to predict the half-life in water and sediment for the test compound (8 -((4 -Amino-3 -nitrophenyl)azo)-7 -hydroxy-2 -naphthyl)trimethylammonium chloride (CAS No. 68391 -32 -2). If released in to the environment, 4.75% of the chemical will partition into water according to the Mackay fugacity model level III and the half-life period of (8 -((4 -Amino-3 -nitrophenyl)azo)-7 -hydroxy-2 -naphthyl)trimethylammonium chloride in water is estimated to be 60 days (1440 hrs). The half-life (60 days estimated by EPI suite) indicates that the chemical is persistent in water and the exposure risk to aquatic animals is moderate to high whereas the half-life period of (8 -((4 -Amino-3 -nitrophenyl)azo)-7 -hydroxy-2 -naphthyl)trimethylammonium chloride in sediment is estimated to be 541.666 days (13000 hrs). Based on this half-life value (541.666 days), it indicates that the chemical (8 -((4 -Amino-3 -nitrophenyl)azo)-7 -hydroxy-2 -naphthyl)trimethylammonium chloride is persistent in sediment.
Biodegradation in soil
The half-life period of (8-((4-Amino-3-nitrophenyl)azo)-7-hydroxy-2-naphthyl)trimethylammonium chloride (CAS No. 68391 -32 -2) in soil was estimated using Level III Fugacity Model by EPI Suite version 4.1 estimation database (EPI suite, 2017). If released into the environment, 65.9% of the chemical will partition into soil according to the Mackay fugacity model level III. The half-life period of (8-((4-Amino-3-nitrophenyl)azo)-7-hydroxy-2-naphthyl)trimethylammonium chloride in soil is estimated to be 120 days (416 hrs). Based on this half-life value of (8-((4-Amino-3-nitrophenyl)azo)-7-hydroxy-2-naphthyl)trimethylammonium chloride, it is concluded that the chemical is not persistent in the soil environment and the exposure risk to soil dwelling animals is moderate to low.
Additional information
Biodegradation in water
A 28-days Closed Bottle test following the OECD guideline 301 D to determine the ready biodegradability of[8-[(4-amino-3-nitrophenyl)azo]-7-hydroxy-2-naphthyl]trimethylammonium chloride(CAS No.68391-32-2) .The test system included control, test item and reference item. 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. 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 BOD28 value of[8-[(4-amino-3-nitrophenyl)azo]-7-hydroxy-2-naphthyl]trimethylammonium chloride(CAS No.68391-32-2)was observed to be 0.42 mgO2/mg. ThOD was calculated as 1.47 mgO2/mg. Accordingly, the % degradation of the test item after 28 days of incubation at 20 ± 1°C according to Closed Bottle test was found to be 28.57%. Based on the results, the test item, under the test conditions, was considered to be primary inherently biodegradable.
Biodegradation in water and sediment
Estimation Programs Interface (EPI) Suite (2017) prediction model was run to predict the half-life in water and sediment for the test compound (8 -((4 -Amino-3 -nitrophenyl)azo)-7 -hydroxy-2 -naphthyl)trimethylammonium chloride (CAS No. 68391 -32 -2). If released in to the environment, 4.75% of the chemical will partition into water according to the Mackay fugacity model level III and the half-life period of (8 -((4 -Amino-3 -nitrophenyl)azo)-7 -hydroxy-2 -naphthyl)trimethylammonium chloride in water is estimated to be 60 days (1440 hrs). The half-life (60 days estimated by EPI suite) indicates that the chemical is persistent in water and the exposure risk to aquatic animals is moderate to high whereas the half-life period of (8 -((4 -Amino-3 -nitrophenyl)azo)-7 -hydroxy-2 -naphthyl)trimethylammonium chloride in sediment is estimated to be 541.666 days (13000 hrs). Based on this half-life value (541.666 days), it indicates that the chemical (8 -((4 -Amino-3 -nitrophenyl)azo)-7 -hydroxy-2 -naphthyl)trimethylammonium chloride is persistent in sediment.
Biodegradation in soil
The half-life period of (8-((4-Amino-3-nitrophenyl)azo)-7-hydroxy-2-naphthyl)trimethylammonium chloride (CAS No. 68391 -32 -2) in soil was estimated using Level III Fugacity Model by EPI Suite version 4.1 estimation database (EPI suite, 2017). If released into the environment, 65.9% of the chemical will partition into soil according to the Mackay fugacity model level III. The half-life period of (8-((4-Amino-3-nitrophenyl)azo)-7-hydroxy-2-naphthyl)trimethylammonium chloride in soil is estimated to be 120 days (416 hrs). Based on this half-life value of (8-((4-Amino-3-nitrophenyl)azo)-7-hydroxy-2-naphthyl)trimethylammonium chloride, it is concluded that the chemical is not persistent in the soil environment and the exposure risk to soil dwelling animals is moderate to low.
On the basis of available information, the test substance (8-((4-Amino-3-nitrophenyl)azo)-7-hydroxy-2-naphthyl)trimethylammonium chloride can be considered to be primary inherently biodegradable.
Information on Registered Substances comes from registration dossiers which have been assigned a registration number. The assignment of a registration number does however not guarantee that the information in the dossier is correct or that the dossier is compliant with Regulation (EC) No 1907/2006 (the REACH Regulation). This information has not been reviewed or verified by the Agency or any other authority. The content is subject to change without prior notice.
Reproduction or further distribution of this information may be subject to copyright protection. Use of the information without obtaining the permission from the owner(s) of the respective information might violate the rights of the owner.
