Sodium cumenesulphonate

Biodegradation in water and sediment: simulation tests

Link to relevant study record(s)

Reference

Reference 1

Endpoint:

biodegradation in water: sewage treatment simulation testing

Type of information:

other: published data

Adequacy of study:

key study

Reliability:

2 (reliable with restrictions)

Rationale for reliability incl. deficiencies:

study well documented, meets generally accepted scientific principles, acceptable for assessment

Justification for type of information:

Dodecylbenzenesulfonate as a read across for Sodium cumenesulphonate

Qualifier:

equivalent or similar to guideline

Guideline:

OECD Guideline 303 A (Simulation Test - Aerobic Sewage Treatment. A: Activated Sludge Units)

GLP compliance:

not specified

Radiolabelling:

yes

Oxygen conditions:

anaerobic

Inoculum or test system:

activated sludge, adapted

Duration of test (contact time):

120 h

Initial conc.:

76 other: ppm

Based on:

test mat.

Details on study design:

This study showed the biodegradation of LAS (DBS-14C) and the decomposition products of DBS-14C. The composition products of DBS-14C were identified by GLC and GC-MS spectrometry.(GLC column ; 0.3 cm×1.7 m, stationary phase; PEG-20M, temp; 200 deg C). And The biodegradation values of DBS-14C was obtained by methlene blue method.

% Degr.:

> 90

Parameter:

test mat. analysis

Sampling time:

90 h

Transformation products:

yes

No.:

#1

No.:

#2

No.:

#3

No.:

#4

Details on transformation products:

1-Tetralone, 1-indanone, 4-methyl-1-tetralone, naphthalene were the decomposition products.

Details on results:

The test substance decreased from 76.0 ppm to less than 0.6 ppmat 90h(Readily degradation).The biodegradation of the substance has three periods of rapid adsorption period, acclimation period, and degradation process. 1-Tetralone, 1-indanone, 4-methyl-1-tetralone, naphthalene were the decomposition products

Validity criteria fulfilled:

yes

Conclusions:

The test substance (Dodecylbenzenesulfonate as a read across for Sodium cumenesulphonate) decreased from 76.0 ppm to less than 0.6 ppmat 90h(Readily degradation).The biodegradation of the substance has three periods of rapid adsorption period, acclimation period, and degradation process. 1-Tetralone, 1-indanone, 4-methyl-1-tetralone, naphthalene were the decomposition products.

Reference 2

Endpoint:

biodegradation in water: sediment simulation testing

Data waiving:

study scientifically not necessary / other information available

Justification for data waiving:

the study does not need to be conducted because the substance is readily biodegradable

Description of key information

The study does not need to be conducted because the substance is ready biodegradable.

The test substance (Dodecylbenzenesulfonate as a read across for Sodium cumenesulphonate) decreased from 76.0 ppm to less than 0.6 ppm at 90h (Readily degradation).The biodegradation of the substance has three periods of rapid adsorption period, acclimation period, and degradation process. 1-Tetralone, 1-indanone, 4-methyl-1-tetralone, naphthalene were the decomposition products.