Sodium 2-hydroxypropane-2-sulphonate

Biodegradation in water: screening tests

Link to relevant study record(s)

Reference

Endpoint:

biodegradation in water: ready biodegradability

Type of information:

experimental study

Adequacy of study:

key study

Study period:

19 January 2001 until 6 September 2001

Reliability:

2 (reliable with restrictions)

Rationale for reliability incl. deficiencies:

guideline study without detailed documentation

Qualifier:

according to guideline

Guideline:

ISO 14593:1999 (Water quality - Evaluation of ultimate aerobic biodegradability of organic compounds in aqueous medium - Method by analysis of inorganic carbon in sealed vessels (CO2 headspace test))

GLP compliance:

yes

Oxygen conditions:

aerobic

Inoculum or test system:

activated sludge (adaptation not specified)

Duration of test (contact time):

28 d

Initial conc.:

656 mg/L

Based on:

test mat.

Parameter followed for biodegradation estimation:

CO2 evolution

Reference substance:

aniline

Key result

Parameter:

% degradation (CO2 evolution)

Value:

>= 80 - <= 90

Sampling time:

28 d

Validity criteria fulfilled:

yes

Interpretation of results:

readily biodegradable

Conclusions:

The degradation after 28 days was determined to be between 80 and 90%.

Executive summary:

The goal of this study was to determine the aerobic biodegradability of sodium 2-hydroxypropane-2-sulphonate. The degradation after 28 days was determined to be between 80 and 90%. Therefor,the substance was determined to be readily biodegradable.

Description of key information

In a CO2-Headspace Test according to ISO 14593 (BASF, 00/0802/27/1) the degradation of sodium 2-hydroxypropane-2-sulphonate was determined to be between 80 - 90% after 28 days. Therefor, the substance was determined to be readily biodegradable.

Key value for chemical safety assessment

Biodegradation in water:

readily biodegradable

Type of water:

freshwater