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Diss Factsheets
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EC number: 212-736-1 | CAS number: 865-33-8
- 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
Hydrolysis
Administrative data
Link to relevant study record(s)
- Endpoint:
- hydrolysis
- Data waiving:
- study technically not feasible
- Justification for data waiving:
- other:
- Endpoint:
- hydrolysis
- Type of information:
- experimental study
- Adequacy of study:
- supporting study
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- other: basic information given
- Qualifier:
- according to guideline
- Guideline:
- EU Method C.7 (Degradation: Abiotic Degradation: Hydrolysis as a Function of pH)
- Deviations:
- yes
- Remarks:
- the substance is water reactive, hydrolytically unstable.
- GLP compliance:
- no
- Analytical monitoring:
- yes
- Details on sampling:
- - Sampling intervals for the parent/transformation products: after 0, 0.75, 1.5 and 2.25 h
- Buffers:
- - pH: 4, 7 and 9
- Type and final molarity of buffer: 100 mL commercial buffer solution - Details on test conditions:
- TEST SYSTEM
Testing material has been weighed and dissolved in 100 mL commercial buffer solution and warmed to 50 °C. For quantification the warmed solutions have been cooled to room temperature rapidly.
OTHER TEST CONDITIONS
- Adjustment of pH: with a commercial buffer solution - Duration:
- 0 h
- pH:
- 4
- Initial conc. measured:
- 989 mg/L
- Duration:
- 0 h
- pH:
- 7
- Initial conc. measured:
- 108 mg/L
- Duration:
- 0 h
- pH:
- 9
- Initial conc. measured:
- 101 mg/L
- Duration:
- 2.25 h
- pH:
- 4
- Temp.:
- 50 °C
- Initial conc. measured:
- 989 mg/L
- Duration:
- 2.25 h
- pH:
- 7
- Temp.:
- 50 °C
- Initial conc. measured:
- 108 mg/L
- Duration:
- 2.25 h
- pH:
- 9
- Temp.:
- 50 °C
- Initial conc. measured:
- 101 mg/L
- Transformation products:
- yes
- No.:
- #1
- % Recovery:
- 0
- pH:
- 4
- Temp.:
- 50 °C
- Duration:
- 0.75 h
- % Recovery:
- 0
- pH:
- 7
- Temp.:
- 50 °C
- Duration:
- 0.75 h
- % Recovery:
- 0
- pH:
- 9
- Duration:
- 0.75 h
- pH:
- 4
- Remarks on result:
- other: The substance is hydrolysed immediately
- pH:
- 7
- Remarks on result:
- other: The substance is hydrolysed immediately
- pH:
- 9
- Remarks on result:
- other: The substance is hydrolysed immediately
Referenceopen allclose all
The substance is hydrolysed immediately to methanol at any pH both at room temeprature and at 50 °C.
Description of key information
Potassium methanolate reacts vigorously on contact with water forming methanol and potassium hydroxide.
Key value for chemical safety assessment
Additional information
Potassium methanolate is an extremely strong conjugated base. In
contact with water, potassium methanolate reacts violently exothermic
forming potassium hydroxide and methanol (OECD, 2002). The heat of this
exothermic reaction may be sufficient to ignite surrounding combustible
materials or potassium methanolate itself, particularly if there is only
little water available. A study investigating the hydrolyis of potassium
methanolate according to EU Method C7 determined an immediate hydrolyses
of the substance to methanol at the tested pH values 4, 7 and 9 (0%
recovery after 0.75 h).
The spontaneous degradation products methanol and potassium hydroxide
are hydrolytically stable since they do not contain any chemical groups
associated with hydrolysis. In addition, methanol is considered to be
readily biodegradable. Thus, in accordance with Annex VIII, column 2 no
hydrolysis testing is needed.
Information on Registered Substances comes from registration dossiers which have been assigned a registration number. The assignment of a registration number does however not guarantee that the information in the dossier is correct or that the dossier is compliant with Regulation (EC) No 1907/2006 (the REACH Regulation). This information has not been reviewed or verified by the Agency or any other authority. The content is subject to change without prior notice.
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