Sodium bis[2-chloro-4-[(4,5-dihydro-3-methyl-5-oxo-1-phenyl-1H-pyrazol-4-yl)azo]-5-hydroxybenzenesulphonamidato(2-)]chromate(1-)

Biodegradation in water: screening tests

Link to relevant study record(s)

Reference

Reference 1

Endpoint:

biodegradation in water: screening test, other

Type of information:

experimental study

Adequacy of study:

supporting study

Reliability:

2 (reliable with restrictions)

Rationale for reliability incl. deficiencies:

comparable to guideline study with acceptable restrictions

Qualifier:

according to guideline

Guideline:

other: In house SOP (method A.15) validated by Ciba which is comparable to standard guideline.

Deviations:

not specified

Principles of method if other than guideline:

The test was done before international testing guidelines habe been developed, therefore the test was done according to an internal standard operating prcedure.

GLP compliance:

no

Oxygen conditions:

aerobic

Inoculum or test system:

not specified

Duration of test (contact time):

5 d

Initial conc.:

50 mg/L

Parameter followed for biodegradation estimation:

O2 consumption

Remarks on result:

not measured/tested

Parameter:

BOD5

Value:

82 other: O2 mg/g

Interpretation of results:

other: BOD5

Conclusions:

BOD5 of FAT 20028/B is 82 mg O2/g.

Executive summary:

The test was carried out according to in-house CIBA SOP (Method A.15) comparable to standard guideline accepted globally for BOD. Based on test results the BOD₅ of FAT 20028/B is 82 mg O₂/g.

Reference 2

Endpoint:

biodegradation in water: screening tests

Type of information:

experimental study

Adequacy of study:

weight of evidence

Study period:

1977

Reliability:

2 (reliable with restrictions)

Rationale for reliability incl. deficiencies:

comparable to guideline study with acceptable restrictions

Qualifier:

according to guideline

Guideline:

other:

Version / remarks:

In house SOP (method A.16) validated by Ciba which is comparable to standard guideline.

Deviations:

not specified

Principles of method if other than guideline:

The test was done before international testing guidelines habe been developed, therefore, the test was done according to an internal standard operating procedure (Method A.16).

GLP compliance:

no

Oxygen conditions:

not specified

Inoculum or test system:

not specified

Duration of test (contact time):

5 d

Initial conc.:

5 mg/L

Parameter followed for biodegradation estimation:

CO2 evolution

Remarks on result:

other: no details provided

Details on results:

-Chlorid:
2.96 mg COD/Cl
pH=10.15

-pH= 10.15

Parameter:

COD

Value:

1 071.24 other: mg COD/g

Interpretation of results:

other: COD

Conclusions:

COD of FAT 20028/B is 1071.24 mg COD/g.

Executive summary:

The test was carried out with FAT 20028/B according to an internal standard operating procedure (Method A.16).Based on the test results, COD of FAT 20028/B is 1071.24 mg COD/g.

Description of key information

For Acid Red 211 only few data on biodegradation in water are available to cover this endpoint. Among these two studies were selected as key study to cover this endpoint. FAT 20028/B was investigated to determine the biological oxygen demand (BOD₅) and the chemical oxygen demand (COD). BOD₅of FAT 20028/B was found to be 80 mg/g O₂and COD was found to be 1071.24 mg/g O₂. The corresponding BOD₅/COD quotient can be calculated to 0.077, which demonstrates the substance to be not biodegradable.In another supporting study with FAT 20028/A, the inherent elimination after 21 days is 71 %. Additionally, few supporting studies available also consider the substance to be not biodegradable. Therefore, based on the biodegradation in water -screening tests, Acid Red 211 was considered as non-biodegradable.

Key value for chemical safety assessment

Biodegradation in water:

not biodegradable

Type of water:

freshwater