Registration Dossier

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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

Diss Factsheets

Environmental fate & pathways

Endpoint summary

Administrative data

Description of key information

Additional information

Hydrolysis

A study was conducted according to OECD TG 111 adopted 12 May 1981. A preliminary test was performed on the test substance at a pH of 4.9, 7.0 and 9.0 for 5 days at 50°C. Less then 10% of the test item degraded, by means of a hydrolysis pathway, after 5 days of storage at 50 °C +/- 1°C. Thus, the test item is considered to be hydrolytically stable and no additional test was performed.

Biodegradation

CO2 Evolution modified Sturm Test

A study was performed to determine the potential for biodegradation of the test item in water by the carbon dioxide evolution method following OECD Test Guideline 301B adopted 17 July 1992. The amount of carbon dioxide (CO2) released upon biodegradation of the test item and a reference substance, sodium benzoate, was measured. Two blank controls containing inoculum, a metabolically inhibited or abiotic control (containing test substance and a sterilant), and toxicity control (containing inoculum, reference and test substances) were also established to account for background CO2 production, abiotic degradation, and toxicity of the test item, respectively. Based on the CO2 analysis results, the test item cannot be classified as readily biodegradable since the test item degradation during the study was determined to be 19.42 % within 28 days and the degradation of the test item was less than the guideline criteria of 60% degradation within 28 days. The sodium benzoate procedural controls had degraded by 86.4% of the theoretical amount in 28 days. All validation criteria were fulfilled.

 

Zahn-Wellens Test / EMPA-Test

A study was performed to determine the potential for inherent biodegradation of the test item in water by the Zahn-Wellens Test method according to OEDC Test Guideline 302B adopted 17. July 1992. A mixture of a total test volume of 2 litres each containing test item, mineral medium and activated sludge was agitated and aerated at 20 - 25 °C in two glass vessels for 28 days. A reference control running in duplicate containing activated sludge, mineral medium and the reference item, and a blank control containing activated sludge and mineral medium were run under the same test conditions. The biodegradation process was monitored by determination of the dissolved organic carbon concentrations (DOC). The ratio of eliminated DOC, corrected for the blank after each time interval, to the initial DOC value was expressed as the percentage biodegradation at each sampling time. Based on the ratio of eliminated DOC, the test item was classified as inherently biodegradable since the test item degradation during the study was determined to be 77 % after 28. The degradation of the reference item was 100% after 28 days and all validation criteria were fulfilled.

Adsorption / desorption

A study was performed for the Determination of the Adsorption Coefficient according to OECD TG 106. The adsorption test with the test item was conducted in acidic sandy soil (SC-1), loamy sand (Roger Myron-North) and alkaline sandy loam (Mutchler) and 0.01 M CaCl2 at a 5:1 solution to soil ratio. The Koc values was determined to be 351 (acidic sandy soil), 395 (loamy sand) and 183 (alkaline sandy loam) respectively. The results indicate that the test item, adsorbed to the SC-1, Roger Myron-North and Mutchler soils. The test item adsorbed between 25 - 53% for the three soils, but did not desorb readily from any of the soils. The Koc values for each of the three soils are between 100 and 1000, therefore, the test item is not expected to be strongly immobile or strongly mobile in soil.