N-ethyl-4-[[4-(ethylamino)-m-tolylphenyl][4-(ethylimino)-3-methylcyclohexa-2,5-dien-1-ylidene]methyl]-m-toluidine monoacetate

Additional information on environmental fate and behaviour

Administrative data

Endpoint:

additional information on environmental fate and behaviour

Type of information:

experimental study

Adequacy of study:

supporting study

Study period:

from 1999-04-27 to 1999-04-28

Reliability:

2 (reliable with restrictions)

Rationale for reliability incl. deficiencies:

other: GLP study but not performed according to internationally accepted guidelines.

Data source

Reference

Reference 1

Reference Type:

study report

Title:

Unnamed

Year:

1999

Report date:

1999

Reference 2

Reference Type:

publication

Title:

Development of a method for adsorption of dyestuffs on activated sludge

Author:

Pagga et al.

Year:

1994

Bibliographic source:

Water Research No. 28 (Pages 1051 -1057)

Materials and methods

Test guideline

Qualifier:

no guideline available

Principles of method if other than guideline:

The test was performed according to Pagga el al. (1994): Development of a method for adsorption of dyestuffs on activated sludge in Water Research No. 28, pages 1051 -1057. The adsorption test is a static method to evaluate the adsorption potential of dyestuffs (water soluble dyestuffs and stable dispersions) on activated sludge. The dyestuffs were incubated in a defined test mixture with activated sludge from a biological waste water treatment plant. After 24 hours and after up to 6 days, samples were taken and analysed for their colour and dissolved organic carbon (DOC). For dispersions only a colour measurement was performed after dissolving in a suitable solvent. The measured values were compared with the values for the dyestuffs before the sludge was added. The elimination was calculated and reported in per cent.

GLP compliance:

yes

Test material

Test material information

Constituent 1

Reference substance name:

N-ethyl-4-[[4-(ethylamino)-m-tolylphenyl][4-(ethylimino)-3-methylcyclohexa-2,5-dien-1-ylidene]methyl]-m-toluidine monoacetate

EC Number:

305-170-2

EC Name:

N-ethyl-4-[[4-(ethylamino)-m-tolylphenyl][4-(ethylimino)-3-methylcyclohexa-2,5-dien-1-ylidene]methyl]-m-toluidine monoacetate

Cas Number:

94349-52-7

Molecular formula:

C28H38N3.C2H3O2

IUPAC Name:

[4-[bis[4-(ethylamino)-3-methyl-phenyl]methylene]-2-methyl-cyclohexa-2,5-dien-1-ylidene]-ethyl-ammonium;acetate

Details on test material:

- Chemical name: Benzenamine, N-ethyl-4-[[4-(ethylamino)-3-methylphenyl][4-(ethylimino)-3 methyl-2,5-cyclohexadien-1 -ylidene]methyl]-2-methyl-, monoacetate
- Purity of the test substance: Please refer Section 1.1 and 1.2
- Date of production: 13/14 Dec. 1998
- Aggregate state: liquid
- Water solubility: infinitely miscible
- Colour: dark violet
- Homogeneity: homogeneous
- Instable against:
a) heat: yes, up to 500 °C;
b) light: not known;
c) O2: not known;
d) water: not known;
e) acid: not known
f) alkali: yes
- Limitation for storage: Yes: 12 months
- Special conditions for storage: No

Results and discussion

Any other information on results incl. tables

95 % colour decreased after 3 hours and 97 % colour decreased after 24 hours. In this case DOC-elimination was not determined. It can be assumed that there will be sufficient elimination of the test substance (dyestuff) in waste water treatments plants.

Applicant's summary and conclusion

Conclusions:

The adsorption/desorption test was performed according to an internal BASF method. The adsorption of the test substance on activated sludge was measured dependent on the decrease in colour and DOC on activated sludge. 95 % colour decreased after 3 hours and 97 % colour decreased after incubation for 24 hours. Therefore it can be assumed that there will be sufficient elimination of the test substance (dyestuff) in waste water treatments plants.

Executive summary:

The adsorption/desorption test was performed according to an internal BASF method in static conditions to evaluate the adsorption potential of the test substance (water soluble dyestuffs and stable dispersion) on activated sludge (BASF AG, 1999). The test substance was incubated in a defined test mixture with activated sludge from a biological waste water treatment plant. The adsorption of the test substance on activated sludge was measured dependent on the decrease in colour and DOC on activated sludge.

The activated sludge used came from a laboratory wastewater plants treating municipal and synthetic sewage. The concentration of the activated sludge (dry substance) was 3 g/L and the concentration of the test substance was 556 mg/L TOC value (equivalent to 549 mg/L DOC). The adsorption degree at 573 nm (0.9 Extinction value) was equivalent to 12 mg/L test substance.

The test substance was sufficiently eliminable from water, therefore it can be assumed that there will be sufficient elimination of the test substance (dyestuff) in waste water treatments plants. At the end of the test 95 % colour decreased after 3 hours and 97 % colour decreased after incubation for 24 hours.