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Diss Factsheets
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EC number: 255-288-2 | CAS number: 41272-40-6
- 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
pH
Administrative data
- Endpoint:
- pH
- Type of information:
- migrated information: read-across from supporting substance (structural analogue or surrogate)
- Adequacy of study:
- key study
- Study period:
- 1953
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- other: No GLP, no guidelines followed Read across from a similar substance which has the same main component and with a different counter ion that doesn't influence the characteristics related to the specific end-point
Data source
Referenceopen allclose all
- Reference Type:
- secondary source
- Title:
- Unnamed
- Year:
- 1 957
- Report date:
- 1969
- Reference Type:
- other: originary study
- Title:
- On the dissociation of the triarylcarbinol
- Author:
- Ginzburg O.F.
- Year:
- 1 953
- Bibliographic source:
- J. Gan. Chem. USSR, 23, (1953), 9, 1504-1509
Materials and methods
- Principles of method if other than guideline:
- Having produced in chemically pure form hydrobromide salts of Malachite Green, it was determined the pH's of its aqueous solution at temperature 19 ± 1°C. Then a weighed sample of the substance is dissolved in 70 ml of 60% aqueous acetone, added 0.5 equivalents of NaOH and was determined the solution pH .
- GLP compliance:
- not specified
Test material
- Reference substance name:
- Malachite Green Hydrobromide
- IUPAC Name:
- Malachite Green Hydrobromide
- Details on test material:
- - Name of test material: hydrobromide of Malachite Green
Constituent 1
Results and discussion
pH valueopen allclose all
- pH value:
- ca. 4.95
- Temp.:
- 19 °C
- Concentration:
- ca. 0.001 other: mol/L
- Remarks on result:
- other: Calculated for 25°C: 4.86
- pH value:
- ca. 5.02
- Temp.:
- 19 °C
- Concentration:
- ca. 0.001 other: mol/L
- Remarks on result:
- other: Calculated for 25°C: 4.94
Any other information on results incl. tables
Sample in water
Dissolved salt | Sample [g] | Concentration[mole/L) | Quantity of water [ml] | pH found | pH calculated for 25°C |
Hydrobromide of Malachite Green | 0.0607 | 1.48 x 10 -3 | 100 | 4.95 | 4.86 |
Hydrobromide of Malachite Green | 0.0481 | 1.05 x 10 -3 | 100 | 5.02 | 4.94 |
Sample in aqueous solution
Dissolved salt | Sample[g] | 0.1 n solution added; NaOH[ml] | pH |
Hydrobromide of Malachite Green | 0.0588 | 0.72 | 6.05 |
Applicant's summary and conclusion
- Conclusions:
- pH's aqueous solution of Hydrobromide of Malachite Green at 19°C ± 1°C: 4.95 a Conc. of 1.48 x 10^-3 mole/L; 5.02 a Conc. of 1.05 x 10^-3 mole/L.
- Executive summary:
Having produced in chemically pure form hydrobromide salts of Malachite Green, it was determined the pH's of its aqueous solution at temperature 19 ± 1°C.
Then a weighed sample of the substance is dissolved in 70 ml of 60% aqueous acetone, added 0.5 equivalents of NaOH and was determined the solution pH .
Results:
Aqueous solution of Hydrobromide of Malachite Green at 19°C ± 1°C:
4.95 a Conc. of 1.48 x 10^-3 mole/L
5.02 a Conc. of 1.05 x 10^-3 mole/L
Aqueous acetone of Malachite Green at 19°C ± 1°C:
6.05 a conc. 0.0588 g in 0.72 ml of NAOH
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