Benzenemethanamine, .alpha.,4-dimethyl-, (.alpha.R)-

Biodegradation in water: screening tests

Administrative data

Endpoint:

biodegradation in water: ready biodegradability

Type of information:

experimental study

Adequacy of study:

key study

Study period:

16 Dec. 2002 to 16 Jan. 2003

Reliability:

2 (reliable with restrictions)

Rationale for reliability incl. deficiencies:

other: Screening test following OECD guideline, basic data given

Data source

Reference

Reference Type:

study report

Title:

Unnamed

Year:

2003

Report date:

2003

Materials and methods

Test guideline

Qualifier:

according to guideline

Guideline:

OECD Guideline 301 A (Ready Biodegradability: DOC Die Away Test)

GLP compliance:

no

Test material

Test material information

Constituent 1

Reference substance name:

D-α-methylbenzylamine

EC Number:

223-423-4

EC Name:

D-α-methylbenzylamine

Cas Number:

3886-69-9

Molecular formula:

C8H11N

IUPAC Name:

1-phenylethanamine

Details on test material:

- Name of test material (as cited in study report):(R)-(+)-Phenylethylamin
- TOC = 785 mg/g
- DOC = 769 mg/g

Study design

Oxygen conditions:

aerobic

Inoculum or test system:

activated sludge, domestic, non-adapted

Details on inoculum:

- Source of inoculum/activated sludge: activated sludge taken from a laboratory wastewater treatment plant fed with municipal sewage.
- Laboratory culture: yes (washed and aerated for 24 hours before being added to the test vessels)
- Concentration of sludge: 30 mg/L (dry substance)

Duration of test (contact time):

28 d

Initial test substance concentration

Initial test substance concentration 1

Initial conc.:

10 mg/L

Based on:

DOC

Initial test substance concentration 2

Initial conc.:

12 mg/L

Based on:

test mat.

Parameter followed for biodegradation estimation

Parameter followed for biodegradation estimation:

DOC removal

Reference substance

Reference substance:

aniline

Results and discussion

% Degradation

% Degradation 1

Parameter:

% degradation (DOC removal)

Value:

< 10

Sampling time:

10 d

% Degradation 2

Parameter:

% degradation (DOC removal)

Value:

ca. 47

Sampling time:

14 d

% Degradation 3

Parameter:

% degradation (DOC removal)

Value:

ca. 98

Sampling time:

17 d

% Degradation 4

Parameter:

% degradation (DOC removal)

Value:

ca. 98

Sampling time:

28 d

BOD5 / COD results

Results with reference substance:

Kinetic of control substance (in %): ca. 90 to 100 after 3 day(s)

Any other information on results incl. tables

- 10-days-window met: yes
- Adaptation phase: 11 days
- Degradation phase: 6 days

Applicant's summary and conclusion

Interpretation of results:

readily biodegradable