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Diss Factsheets
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EC number: 242-958-4 | CAS number: 19321-38-1
- 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
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- JUN 2020
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- study well documented, meets generally accepted scientific principles, acceptable for assessment
- Reason / purpose for cross-reference:
- reference to same study
- Principles of method if other than guideline:
- Standard production material is hydrolyzed with water, then titrated with 0.5 N HCl to determine the base concentration of the solution. Exhibit the complete hydrolysis of the material within a set period of time.
- GLP compliance:
- no
- Remarks:
- Test was done in-house because chemical behaviour of the substance is commonly known. Test was done to support the RA-approach, that the hydrolysis products have to be assessed in ecotoxicology testing instead of the parent substance.
- Radiolabelling:
- no
- Analytical monitoring:
- no
- Transformation products:
- yes
- No.:
- #1
- No.:
- #2
- % Recovery:
- 0
- pH:
- 8.48
- Duration:
- 144 s
- Remarks on result:
- other: see 'Remarks'
- Remarks:
- As the substance undergoes fast hydrolysis (within < 5 minutes) the half-life time of the hydroylsis was not determined
- Validity criteria fulfilled:
- yes
- Conclusions:
- The test substance undergoes very fast hydrolysis within 144 seconds.
- Executive summary:
The hydrolytical behaviour of the test substance was assessed in-house via titration method by company:
Standard production material is hydrolyzed with water, then titrated with 0.5 N HCl to determine the base concentration of the solution. Exhibit the complete hydrolysis of the material within a set period of time. The time needed to complete the titration is 3 minutes and 16 seconds. There are two endpoints:
1. NaOH titration (NaM hydrolysis) 2 minutes, 24 seconds. pH = 8.48
2. Sodium Carbonate titration (by-product of air exposure). 3 minutes, 16 seconds. pH = 6.02
The starting pH of the alkoxide solution is 12.5 as a 1:1 dilution in deionized water.
Reference
The time needed to complete the titration is 3 minutes and 16 seconds. There are two endpoints:
1. NaOH titration (NaM hydrolysis) 2 minutes, 24 seconds. pH = 8.48
2. Sodium Carbonate titration (by-product of air exposure). 3 minutes, 16 seconds. pH = 6.02
The starting pH of the alkoxide solution is 12.5 as a 1:1 dilution in deionized water.
Description of key information
The hydrolytical behaviour of the test substance was assessed in-house via titration method by company:
Standard production material is hydrolyzed with water, then titrated with 0.5 N HCl to determine the base concentration of the solution. Exhibit the complete hydrolysis of the material within a set period of time. The time needed to complete the titration is 3 minutes and 16 seconds. There are two endpoints:
1. NaOH titration (NaM hydrolysis) 2 minutes, 24 seconds. pH = 8.48
2. Sodium Carbonate titration (by-product of air exposure). 3 minutes, 16 seconds. pH = 6.02
The starting pH of the alkoxide solution is 12.5 as a 1:1 dilution in deionized water.
Key value for chemical safety assessment
Additional information
In-house testing took place at ambient conditions, which was assumed to be 25 °C and 1013 hPa. Nevertheless the exact value for the temperature does not affect the hydrolysis rate significantly because hydrolysis occurs in any case within seconds. As the substance undergoes fast hydrolysis (within < 5 minutes) the half-life time of the hydroylsis was not determined.
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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