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EC number: 911-428-0 | CAS number: -
- Life Cycle description
- Uses advised against
- Endpoint summary
- Appearance / physical state / colour
- Melting point / freezing point
- Boiling point
- Density
- Particle size distribution (Granulometry)
- Vapour pressure
- Partition coefficient
- Water solubility
- Solubility in organic solvents / fat solubility
- Surface tension
- Flash point
- Auto flammability
- Flammability
- Explosiveness
- Oxidising properties
- Oxidation reduction potential
- Stability in organic solvents and identity of relevant degradation products
- Storage stability and reactivity towards container material
- Stability: thermal, sunlight, metals
- pH
- Dissociation constant
- Viscosity
- Additional physico-chemical information
- Additional physico-chemical properties of nanomaterials
- Nanomaterial agglomeration / aggregation
- Nanomaterial crystalline phase
- Nanomaterial crystallite and grain size
- Nanomaterial aspect ratio / shape
- Nanomaterial specific surface area
- Nanomaterial Zeta potential
- Nanomaterial surface chemistry
- Nanomaterial dustiness
- Nanomaterial porosity
- Nanomaterial pour density
- Nanomaterial photocatalytic activity
- Nanomaterial radical formation potential
- Nanomaterial catalytic activity
- Endpoint summary
- Stability
- Biodegradation
- Bioaccumulation
- Transport and distribution
- Environmental data
- Additional information on environmental fate and behaviour
- Ecotoxicological Summary
- Aquatic toxicity
- Endpoint summary
- Short-term toxicity to fish
- Long-term toxicity to fish
- Short-term toxicity to aquatic invertebrates
- Long-term toxicity to aquatic invertebrates
- Toxicity to aquatic algae and cyanobacteria
- Toxicity to aquatic plants other than algae
- Toxicity to microorganisms
- Endocrine disrupter testing in aquatic vertebrates – in vivo
- Toxicity to other aquatic organisms
- Sediment toxicity
- Terrestrial toxicity
- Biological effects monitoring
- Biotransformation and kinetics
- Additional ecotoxological information
- Toxicological Summary
- Toxicokinetics, metabolism and distribution
- Acute Toxicity
- Irritation / corrosion
- Sensitisation
- Repeated dose toxicity
- Genetic toxicity
- Carcinogenicity
- Toxicity to reproduction
- Specific investigations
- Exposure related observations in humans
- Toxic effects on livestock and pets
- Additional toxicological data

Biodegradation in water: screening tests
Administrative data
Link to relevant study record(s)
- Endpoint:
- biodegradation in water: ready biodegradability
- Type of information:
- read-across based on grouping of substances (category approach)
- Adequacy of study:
- key study
- Justification for type of information:
- For details on endpoint specific justification please see read-across report in section 13 or find a link in cross-reference “assessment report”.
- Reason / purpose for cross-reference:
- assessment report
- Key result
- Parameter:
- % degradation (O2 consumption)
- Value:
- 54
- Sampling time:
- 28 d
- Remarks on result:
- other: Montan wax Type E
- Remarks:
- in a 10 day window, about 38% had been degraded
- Key result
- Parameter:
- % degradation (CO2 evolution)
- Value:
- 8
- Sampling time:
- 28 d
- Remarks on result:
- other: Montan wax Type S
- Key result
- Parameter:
- % degradation (O2 consumption)
- Value:
- 22
- Sampling time:
- 28 d
- Remarks on result:
- other: Montan wax Type OP
- Remarks:
- in a 10 day window, about 10% had been degraded
- Validity criteria fulfilled:
- yes
- Interpretation of results:
- not readily biodegradable
- Conclusions:
- In reliable studies members of the category of Montan waxes proved to be not readily biodegradable.
- Executive summary:
The studies used as source investigated the ready biodegradability of the category of Montan waxes. The study results of the source compound were considered applicable to the target compound and were used for classification and labelling acc. to REGULATION (EC) No 1272/2008. Justification and applicability of the read-across approach (category approach) is outlined in the read-across report in section 13 or find a link in cross reference “assessment report”.
Reference
Description of key information
In reliable studies members of the category of montan waxes proved to be not readily biodegradable.
The submission substance is not readily biodegradable.
Note, the key value for CSA was chosen as 'under test conditions no biodegradation observed' based on conservative pre-assumption. However, the key value is not necessary, because no exposure assessment is performed (please refer to chapter 9 and 10 of the CSA).
Key value for chemical safety assessment
- Biodegradation in water:
- under test conditions no biodegradation observed
- Type of water:
- freshwater
Additional information
Please refer to CSR for further details on study summaries of different members of the Montan waxes category as well as Read-across justification in section 13 'assessment reports'.
Six reliable (four RL 1, two RL 2) OECD 301 studies for different members of the Montan waxes category consistently demonstrate members of the Montan waxes category to be not readily biodegradable.
Six tests on ready biodegradability (according to OECD 301, all performed compliant to GLP) for different members of the Montan waxes category are available: Montan waxes, types S and NaV 101 were tested in the Modified Sturm Test (OECD 301B, CO2-evolution), and Montan waxes types CaV 102, OP, WE4 and E in the Closed Bottle Test (OECD 301D, O2-consumption). Depending on the results, three groups in regard to biodegradability potential may be formed:
Under test conditions no biodegradation observed (below 10%): This was the case for Montan waxes, type S only. The determined mean biodegradation rate after 28 days was 8 %. No inhibitory action towards biodegradation of reference item was observed (RL 1).
Inherent primary biodegradability: According to criteria set by the OECD (OECD/OCDE, 2006) a biodegradation rate above 20% may be interpreted as sign for inherent primary biodegradation. This holds true for Montan waxes, types NaV 101 (RL 1), CaV 102 (RL 1) and OP (RL2). For type NaV 101, a mean biodegradation after 28 days of 21 % was determined and no inhibitory action towards biodegradation of reference item was observed. For type CaV 102, 26.1 % and for type OP, 22% biodegradation was reached within 28 days.
Inherent biodegradability: According to ECHA Guidance on Information Requirements, part R.7B, R.7.9.4, results of ready biodegradability tests almost fulfilling the pass level criterion (60% for ThOD) can be used to prove inherent biodegradability, eliminating the need of further inherent tests. This applies to Montan waxes, type WE 4 (RL 1) and type E (RL 2). For these waxes, biodegradation to 60% and 54%, respectively, within 28 days were determined.
Observed differences in biodegradability might be due to the different tests applied: The least biodegradable Montan waxes, types S (8% biodegradation) and NaV 101 (21% biodegradation) were assessed in the Modified Sturm Test, whereas the other Montan waxes types with biodegradation degrees between 22% and 60% were tested in the Closed Bottle Test.
In conclusion, the members of the Montan waxes category are considered to be not readily biodegradable. However, some biodegradation was observed at least for some of the category members: two from six tested category members are inherently biodegradable and another three may be regarded as inherently primary biodegradable.
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