Sodium 2-(2-dodecyloxyethoxy)ethyl sulphate

Endpoint summary

Additional information

Stability

Phototransformation in air :

The atmospheric oxidation half-life of sodium 2-(2-dodecyloxyethoxy) ethyl sulphate was estimated using the level III multimedia model. It was estimated that the substance is not persistent in air medium as the half life period of sodium 2-(2-dodecyloxyethoxy)ethyl sulphate in air is only 0.35 days. This indicates that sodium 2-(2-dodecyloxyethoxy)ethyl sulphate is rapidly phototransformed in air.

OVERALL OH Rate Constant =0.000000000045cm3/molecule-sec at 25 degC.

Hydrolysis :

The Hydrolysis rate constant of sodium 2-(2-dodecyloxyethoxy) ethyl sulphate is estimated to be 0.0000000000454767 cm3/molecule-sec. at half life of 2.822 hrs.The estimated half life of the substance indicates that the substance is moderately hydrolysable.

Phototransformation in water

No experimental data available. As this study is not a standard information requirement in REACH and there is no indication from the CSA on the need to investigate further the fate and behaviour of the substance (Annex X requirement), no further testing is considered necessary.

Phototransformation in soil

No experimental data available. As this study is not a standard information requirement in REACH and there is no indication from the CSA on the need to investigate further the fate and behaviour of the substance (Annex X requirement), no further testing is considered necessary.

Biodegradation

Biodegradation in water :

Based on studies of target substance sodium 2-(2-dodecyloxyethoxy) ethyl sulphate reviewed for Biodegradation in water: screening tests from reliable sources having Klimisch rating 2.

The summary of the results are presented below

Sr.No	Endpoint	Half life	Parameter	Sources
1	ready biodegradability	50% degradation in 38 days	Test mat. analysis	Predicted data from PBT profiler
2	ready biodegradability	71.199% degradation	O2 consumption	Predicted data from QSAR

 

 

By applying weight of evidence approach the target chemical found to be readily biodegradable with 50% to 71.199 % percentage degradation.Thus it is concluded that sodium 2-(2-dodecyloxyethoxy) ethyl sulphate is readily biodegradable in water.

Biodegradation in water and sediment :

The half life period of sodium 2-(2-dodecyloxyethoxy)ethyl sulphate in water is 38 days and based on this value it can be concluded that the chemical is not persistent in water medium since the half life is less than the threshold of 40 days (to qualify the chemical as persistent). Also the diffusion percentage of sodium 2-(2-dodecyloxyethoxy)ethyl sulphate in water medium is 15 %. This coupled with the dilution of water shall result in ready biodegradabililty of the chemical.

Media	Half-Life (days)	Percent in Each Medium
Water	38	15%
Sediment	340	2%

Biodegradation in soil :

Based on studies of target substance sodium 2-(2-dodecyloxyethoxy) ethyl sulphate reviewed for Biodegradation in water: screening tests from reliable sources having Klimisch rating 2.

 The summary of the results are presented below

 

of target substancesodium 2-(2-dodecyloxyethoxy) ethyl sulphatereviewed for Biodegradation in soil from reliable sources having Klimisch rating 2.

 

The summary of the results are presented below

 

 

Sr.No	Endpoint	Half life	Parameter	result	Sources
1	ready biodegradability	75 days	Test mat. analysis	Readily biodegradable	Predicted data from PBT profiler and EPI suite
2	ready biodegradability	68 days	-	Readily biodegradable	Predicted data from QSAR

 

By applying weight of evidence approach the target chemical found to be not persistent with half life 68 to 75 days which does not exceeds the threshold (120 days) of not being persistent in soil.Thus it is concluded that sodium 2-(2-dodecyloxyethoxy) ethyl sulphate is biodegradable in soil.

Bioaccumulation

Based on studies reviewed for bioaccumulation from reliable sources having Klimisch rating 2.

The summary of the results are presented below

 

Sr.No	Endpoint	Effect values	Interpretation of results	Species	Sources
1	BCF	71	Non -bioaccumulative	Fish	Predicted data from PBT Profiler
2	BCF	70.79L/kg	Non -bioaccumulative	Fish	Predicted data from EPI Suite
3	BCF	72.127L/kg	Non -bioaccumulative	Cyprinus carpio	Predicted data from QSAR

 

By applying weight of evidence approach to the target substance sodium 2-(2-dodecyloxyethoxy) ethyl sulphate,the endpoint value of bioaccumulation was found to vary between BCF = 70.79 to 72.127 in aquatic organisms /fish.Thus it is concluded that the test substance sodium 2-(2-dodecyloxyethoxy) ethyl sulphate is not expected to bioaccumulate in the food chain because it does not exceed the BCF criteria.

Adsorption / desorption :

Soil Adsorption Coefficient i.e Koc value of sodium 2-(2-dodecyloxyethoxy) ethyl sulphate was estimated as 2111 L/kg by means of MCI method. This indicates that sodium 2-(2-dodecyloxyethoxy) ethyl sulphate will have a moderate tendency of sorption to soil and have slow migration potential to groundwater.This koc value is equivalent to 1688.8 (log koc as 3.23) at 20 deg C.

Henry's Law constant :

Henry's Law states that at a constant temperature, the amount of a given gas that dissolves in a given type and volume of liquid is directly proportional to the partial pressure of that gas in equilibrium with that liquid. Henrys Law Constant of sodium 2-(2-dodecyloxyethoxy) ethyl sulphate at 25 deg C is 0.00000451 Pa m³/mol.