N-[2-[(2-cyano-4,6-dinitrophenyl)azo]-5-(diethylamino)phenyl]acetamide

Biodegradation in water: screening tests

Link to relevant study record(s)

Reference

Reference 1

Endpoint:

biodegradation in water: ready biodegradability

Type of information:

experimental study

Adequacy of study:

key study

Study period:

Study completion date: 09 December 1983

Reliability:

2 (reliable with restrictions)

Rationale for reliability incl. deficiencies:

comparable to guideline study with acceptable restrictions

Qualifier:

according to guideline

Guideline:

other: CIBA Internal method A-15

Version / remarks:

Comparable to Internationally accepted guideline.

Deviations:

no

GLP compliance:

no

Specific details on test material used for the study:

Name: FAT 36165/A
Purity: 18.04 %

Oxygen conditions:

aerobic

Inoculum or test system:

activated sludge (adaptation not specified)

Duration of test (contact time):

5 d

Parameter followed for biodegradation estimation:

O2 consumption

Remarks on result:

not measured/tested

Parameter:

BOD5

Value:

5.6 mg O2/g test mat.

Validity criteria fulfilled:

not specified

Interpretation of results:

under test conditions no biodegradation observed

Conclusions:

The Biological Oxygen Demand (BOD5) of FAT 36156/A was detremined to be 5.6 mg O2/g test mat.

Executive summary:

The Biological Oxygen Demand (BOD5) of FAT 36156/A was determined according to in house Ciba Geigy Method A.15, which is comparable to internationally accepted guidelines. Based on these investigations, the BOD5 of test substance was found to be 5.6 mg O2/g. Considering the COD value determined with the test substance which is 1134 mg O2/g, the resulting BOD5/COD quotient is 0.004, indicating that the test substance is not readily biodegradable.

Reference 2

Endpoint:

biodegradation in water: ready biodegradability

Type of information:

experimental study

Adequacy of study:

key study

Study period:

Study completion date: 28 November 1983

Reliability:

2 (reliable with restrictions)

Rationale for reliability incl. deficiencies:

comparable to guideline study with acceptable restrictions

Qualifier:

according to guideline

Guideline:

other: CIBA Internal guideline Method A-12

Version / remarks:

Comparable to internationally accepted guideline.

Deviations:

no

GLP compliance:

no

Specific details on test material used for the study:

Name: FAT 36156/A
Purity: 18.04 %

Oxygen conditions:

other: COD being determined, hence oxygen conditions are not required

Inoculum or test system:

water (not specified)

Duration of test (contact time):

2 h

Parameter followed for biodegradation estimation:

O2 consumption

Remarks on result:

not measured/tested

Parameter:

COD

Value:

1 134 mg O2/g test mat.

Validity criteria fulfilled:

not specified

Interpretation of results:

not readily biodegradable

Conclusions:

The Chemical Oxygen Demand of FAT 36156/A was determined to be 1134 mg O2/g test mat.

Executive summary:

The Chemical Oxygen Demand (COD) of FAT 36156/A was determined according to in house Ciba Geigy Methode A.16. Based on the findings of the study, the COD of test substance was found to be 1134 mg O2/g. For the test material, the BOD5 was determined to be 5.6 mg O2/g, which gives the BOD5/COD ratio of 0.004 indicating that the substance is not rapidly biodegradable.

Description of key information

In studies performed to determine the ready biodegradation of FAT 36156/A, the BOD5 and COD was estimated to be 5.6 mg/g O2 and 1134 mg/g O2, respectively. Relevant is the BOD5/COD quotient which is equal to 0, therefore, the substance is not indicative of rapid degradation. Disperse Blue 165:1 can be regarded as not biodegradable.

Key value for chemical safety assessment

Biodegradation in water:

under test conditions no biodegradation observed

Type of water:

freshwater