[No public or meaningful name is available]

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:

1974

Reliability:

2 (reliable with restrictions)

Rationale for reliability incl. deficiencies:

comparable to guideline study with acceptable restrictions

Qualifier:

according to guideline

Guideline:

other: internal SOP A.15

Version / remarks:

In-house CIBA methodology comparable to standard guideline accepted globally for BOD

Deviations:

not specified

GLP compliance:

no

Oxygen conditions:

aerobic

Inoculum or test system:

activated sludge (adaptation not specified)

Details on inoculum:

Not further specified.

Duration of test (contact time):

5 d

Parameter followed for biodegradation estimation:

O2 consumption

Details on study design:

see materials & methods below

Remarks on result:

not measured/tested

Details on results:

None

Parameter:

BOD5

Value:

24 mg O2/g test mat.

Validity criteria fulfilled:

not specified

Interpretation of results:

under test conditions no biodegradation observed

Conclusions:

The Biological Oxygen Demand of FAT 40069/A was determined to be 24 mg O2/g test mat.

Executive summary:

A study was performed to determine the biological oxygen demand of FAT 40069/A. The BOD5 of FAT 40069/A was determined to be 24 mg O2/g test material.

Reference 2

Endpoint:

biodegradation in water: ready biodegradability

Type of information:

experimental study

Adequacy of study:

key study

Study period:

1974

Reliability:

2 (reliable with restrictions)

Rationale for reliability incl. deficiencies:

comparable to guideline study with acceptable restrictions

Qualifier:

according to guideline

Guideline:

other: internal SOP A.16

Version / remarks:

In-house CIBA methodology comparable to standard guideline accepted globally for COD

Deviations:

not specified

GLP compliance:

no

Oxygen conditions:

other: Not required as COD is being determined

Inoculum or test system:

other: Not required as COD is being determined

Duration of test (contact time):

2 h

Remarks on result:

not measured/tested

Parameter:

COD

Value:

787.94 mg O2/g test mat.

Validity criteria fulfilled:

not specified

Interpretation of results:

other: COD is determined

Conclusions:

The Chemical Oxygen Demand of FAT 40069/A was determined to be 787.94 mg O2/g test material.

Executive summary:

This study describes the experimental techniques and the results obtained in a COD test of FAT 40069/A. The study was performed in accordance with DIN 38409-H41-1.

The COD of FAT 40069/A is 787.94 mg O2/g test material. Taking the results of the respective BOD5 determination into account, the BOD5/COD quotient is 24 mg/g divided by 787.94 mg/g = 0.03. Therefore, no biodegradation is expected at all.

Description of key information

The test substance FAT 40069 was found to be not readily biodegradable.

Key value for chemical safety assessment

Biodegradation in water:

under test conditions no biodegradation observed

Type of water:

freshwater

Additional information

A study was performed to determine the biodegradation of FAT 40069/A. The experiment was conducted following a procedure equivalent to OECD guideline 303 A (confirmatory test). The biological elimination of FAT 40069/A is found to be 0 %.

Several other studies showed the following results:

COD of 787.94 mg O2/g test material.

BOD5 of 24 mg O2/g test material.

The relevant BOD5/COD quotient is <0.5, therefore the substance is not indicative of rapid degradation.

Taking all data into account, the test substance FAT 40069 is considered to be not biodegradable.