Registration Dossier
Registration Dossier
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EC number: 200-001-8 | CAS number: 50-00-0
Adsorption / desorption
Administrative data
Link to relevant study record(s)
- Endpoint:
- adsorption / desorption: screening
- Type of information:
- calculation (if not (Q)SAR)
- Adequacy of study:
- key study
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- accepted calculation method
- Qualifier:
- no guideline followed
- Principles of method if other than guideline:
- Calculation
- GLP compliance:
- no
- Type of method:
- other: calculation
- Media:
- soil
- Type:
- Koc
- Value:
- 15.9
- Type:
- log Koc
- Value:
- 1.202
Reference
Description of key information
Adsorption to solid soil phase is not expected.
Key value for chemical safety assessment
- Koc at 20 °C:
- 15.9
Additional information
There are no experimental studies available to assess the adsorption ability of the test. The value was calculated by a reliable calculation method instead. According to ECHAs TGD part 3 (2003) the log Koc was calculated based on the experimental determined log Kow of 0.35 (Hansch et a. 1995) with the formular for nonhydrophobics: log Koc= 0.52 * log Kow + 1.02. This calculation results in a log Koc of 1.202 (Koc = 15.9) (BASF SE, 2008). This observation is underlined by an assessment on soil adsorption properties of formaldehyde as given in Chénier 2003. In addition, calculations with the valid QSAR model KOCwin v2.00 in EPIwin v.4.11 from US EPA support these findings. Based on the experimental log Kow (Hansch et al. 1995) a log Koc of 0.8894 (Koc = 7.752) was calculated. Due to its low molecular weight (30.03 g/mol) the test item does not falling completely into the applicability domain. However, the result is within the same range as the previous calculations and underline the low adsorptive potential to the solid soil phase. No adsorption the solid soil phase is expected.
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