Registration Dossier
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EC number: 215-170-3 | CAS number: 1309-42-8
Biodegradation in water and sediment: simulation tests
Administrative data
Link to relevant study record(s)
- Endpoint:
- biodegradation in water: sediment simulation testing
- Data waiving:
- study technically not feasible
- Justification for data waiving:
- other:
- Transformation products:
- not specified
- Endpoint:
- biodegradation in water: simulation testing on ultimate degradation in surface water
- Data waiving:
- study technically not feasible
- Justification for data waiving:
- other:
- Transformation products:
- not specified
Referenceopen allclose all
Description of key information
Tests on biodegradation are not relevant for inorganic substances.
Key value for chemical safety assessment
Additional information
Biodegradation in sediment: simulation test:
The substance is an inorganic hydroxide and as such is not subject to biodegradation. According to Annex VII of Regulation (EC) 1907/2006, 9.2.1.1 substances have not to be tested for ready biodegradability if substances are inorganic. Furthermore, magnesium hydroxide has a very low propensity for adsorption to sediment (derived Kd value of 1.65). In accordance with REACH Annex IX, endpoint 9.2.1.4 sediment simulation testing is foreseen for substances with a high potential for adsorption to sediment. Thus, testing is neither technically possible for this inorganic substance nor required due to the low potential for adsorption.
Biodegradation in water: simulation tests:
The substance is an inorganic hydroxide and as such is not subject to biodegradation. According to Annex VII of Regulation (EC) 1907/2006, endpoint 9.2.1.1, colums 2, substances have not to be tested for ready biodegradability if substances are inorganic. In accordance with REACH Annex IX, endpoint 9.2.1.2, column 2, simulation testing on ultimated degradation in surface water can be waived for highly insolube or readily biodegradable substances. Both criteria do not apply to magnesium hydroxide. However, in accordance with REACH Annex XI, section 2, testing can nonetheless be omitted, as it is technically not possible to test inorganic substances for biodegradation in environmental compartments.
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