1-[(2-chloro-4-nitrophenyl)azo]-2-naphthol

Biodegradation in water: screening tests

Administrative data

Endpoint:

biodegradation in water: ready biodegradability

Type of information:

migrated information: read-across based on grouping of substances (category approach)

Adequacy of study:

key study

Study period:

1998

Reliability:

2 (reliable with restrictions)

Rationale for reliability incl. deficiencies:

other: Read across to Pigment Red 3– this is another substance in the Monoazo Red consortium which is a structural analogue

Data source

Reference

Reference Type:

publication

Title:

Biodegradation and bioconcentration of existing chemical substances

Author:

Unknown

Year:

1998

Bibliographic source:

National Insitute of Technology and Evaluation

Report date:

1998

Materials and methods

Test guideline

Qualifier:

according to guideline

Guideline:

OECD Guideline 301 C (Ready Biodegradability: Modified MITI Test (I))

GLP compliance:

not specified

Test material

Test material information

Constituent 1

Reference substance name:

1-(4-methyl-2-nitrophenylazo)-2-naphthol

EC Number:

219-372-2

EC Name:

1-(4-methyl-2-nitrophenylazo)-2-naphthol

Cas Number:

2425-85-6

Molecular formula:

C17H13N3O3

IUPAC Name:

1-[(4-methyl-2-nitrophenyl)diazenyl]-2-naphthol

Details on test material:

Purity: 96.8%

Study design

Oxygen conditions:

aerobic

Inoculum or test system:

activated sludge (adaptation not specified)

Duration of test (contact time):

28 d

Initial test substance concentration

Initial conc.:

100 mg/L

Based on:

test mat.

Results and discussion

% Degradation

% Degradation 1

Parameter:

% degradation (O2 consumption)

Value:

ca. 0

Sampling time:

28 d

% Degradation 2

Parameter:

% degradation (test mat. analysis)

Value:

0 - < 1

Sampling time:

28 d

Applicant's summary and conclusion

Validity criteria fulfilled:

yes

Interpretation of results:

under test conditions no biodegradation observed

Conclusions:

Not ready biodegradable.