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EC number: 231-868-0 | CAS number: 7772-99-8
- 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
- Endpoint:
- hydrolysis
- Type of information:
- other: modeling
- Study period:
- 1939-2006
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- other: Publication is a rewiew of measured data from 1939 to 1995 in the background of modeling tin in radioactive waste
- Data waiving:
- other justification
- Justification for data waiving:
- other:
Data source
Referenceopen allclose all
- Reference Type:
- publication
- Title:
- A critical rewiev of thermodynamic data for inorganic tin species
- Author:
- Séby et al.
- Year:
- 2 001
- Bibliographic source:
- Geochimica et Cosmochimica Acta Vol. 65, 3041-3053, 2001
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 1 981
- Reference Type:
- publication
- Title:
- On the role of Sulfate Ion in Acid Tin Methansulfonate Electrolytes
- Author:
- Martyak et al.
- Year:
- 2 006
- Bibliographic source:
- Galvanotechnik 1/2006 p.46ff
Materials and methods
Test guideline
- Qualifier:
- equivalent or similar to guideline
- Guideline:
- OECD Guideline 111 (Hydrolysis as a Function of pH)
- Deviations:
- not applicable
- Remarks:
- special methods see box "pronciples of methode if other than guideline"
- Principles of method if other than guideline:
- methodes used: potentiometry, Difference Pulse Cathodic Stripping Voltammetry, calculation, combination of thermodynamic formation data
- GLP compliance:
- no
Test material
- Reference substance name:
- 21651-19-4
- Cas Number:
- 21651-19-4
- IUPAC Name:
- 21651-19-4
- Reference substance name:
- 18282-10-5
- Cas Number:
- 18282-10-5
- IUPAC Name:
- 18282-10-5
- Reference substance name:
- Tin difluoride
- EC Number:
- 231-999-3
- EC Name:
- Tin difluoride
- Cas Number:
- 7783-47-3
- Reference substance name:
- Tin dichloride
- EC Number:
- 231-868-0
- EC Name:
- Tin dichloride
- Cas Number:
- 7772-99-8
- Molecular formula:
- [Cl-].[Cl-].[Sn++]
- IUPAC Name:
- tin dichloride
- Reference substance name:
- Tin dibromide
- EC Number:
- 233-087-0
- EC Name:
- Tin dibromide
- Cas Number:
- 10031-24-0
- Reference substance name:
- Tin diiodide
- EC Number:
- 233-667-3
- EC Name:
- Tin diiodide
- Cas Number:
- 10294-70-9
- Reference substance name:
- Tetrafluorostannane
- EC Number:
- 232-016-0
- EC Name:
- Tetrafluorostannane
- Cas Number:
- 7783-62-2
- IUPAC Name:
- tetrafluorostannane
- Reference substance name:
- Tin tetrachloride
- EC Number:
- 231-588-9
- EC Name:
- Tin tetrachloride
- Cas Number:
- 7646-78-8
- IUPAC Name:
- tin(4+) tetrachloride
- Reference substance name:
- Tin tetrabromide
- EC Number:
- 232-184-5
- EC Name:
- Tin tetrabromide
- Cas Number:
- 7789-67-5
- IUPAC Name:
- tin(4+) tetrabromide
- Reference substance name:
- Tin tetraiodide
- EC Number:
- 232-208-4
- EC Name:
- Tin tetraiodide
- Cas Number:
- 7790-47-8
- IUPAC Name:
- tin(4+) tetraiodide
Constituent 1
Constituent 2
Constituent 3
Constituent 4
Constituent 5
Constituent 6
Constituent 7
Constituent 8
Constituent 9
Constituent 10
- Radiolabelling:
- no
Study design
- Analytical monitoring:
- not specified
- Estimation method (if used):
- modeling at standard conditions (temperature: 25°C, pressure: 1 bar, ionic strenght: 0) using SIT methodology
Results and discussion
- Transformation products:
- yes
Any other information on results incl. tables
Sédy et al. pointed out that in the most studies to high concentrations of tin were used and so polytin complexes were formed. Further Sédy et al. show that there is a different in the species formed in a solution with and without halogeninde.
The values measured under standard conditions (25°C, 1bar)
Chemical equilibrium |
-log^{m}K° |
I (mol L^{-}) |
Remark |
Sn^{2+} + H_{2}O <=> SnOH^{+} + H^{+} |
3.8 +/- 0.2 |
0.1, 0.5, 1.0 |
Inorganic tin hydrolysis |
Sn^{2+} + 2H_{2}O <=> Sn(OH)^{0}_{2} + 2H^{+} |
7.8 +/- 0.2 |
0.1, 0.5, 1.0 |
Inorganic tin hydrolysis |
Sn^{2+} +3H_{2}O <=> SnOH^{-}_{3} + 3H^{+} |
-17.5 +/- 0.2 |
0.1, 0.5, 1.0 |
Inorganic tin hydrolysis |
Sn(OH)_{2}(s)óSn^{2+} + OH^{-} |
25.80 |
0_{corr} |
Precipitation Reactions |
SnO(s) + H_{2}O <=> Sn^{2+} + OH^{-} |
26.24 |
0_{corr} |
Precipitation Reactions |
The ion interaction coefficients are:
%epsilon |
Value (L mol^{-1} |
Sn^{2+}, NO_{3}^{-} |
0.4 +/- 0.1 |
SnOH^{+}, NO_{3}^{-} |
0.2 +/- 0.1 |
Sn(OH)_{2}, NO_{3}^{-} |
0.3 +/- 0.1 |
H^{+}, NO_{3}^{-} |
0.07 +/- 0.01 |
Distribution of various species of tin (II) as a function of pH
|
Sn^{2+} / % |
Sn(OH)^{+} / % |
Sn(OH)_{2} / % |
Sn(OH)_{3}^{-} / % |
4.0 |
30 |
40 |
30 |
0 |
4.5 |
7 |
34 |
59 |
0 |
5.0 |
2 |
11 |
87 |
0 |
5.5 |
0 |
4 |
96 |
0 |
6.0 |
0 |
2 |
98 |
0 |
6.5 |
0 |
1 |
99 |
0 |
7.0 |
0 |
0 |
100 |
0 |
7.5 |
0 |
0 |
99 |
1 |
8.0 |
0 |
0 |
98 |
2 |
8.5 |
0 |
0 |
95 |
5 |
9.0 |
0 |
0 |
80 |
20 |
9.5 |
0 |
0 |
50 |
50 |
10.0 |
0 |
0 |
30 |
70 |
Distribution of various species of tin (II) as a function of pH in present of 10^{-2} mol L^{-} [Cl^{-}]
|
Sn^{2+} / % |
SnCl^{+} / % |
SnCl_{2} / % |
Sn(OH)^{+} / % |
Sn(OH)_{2} / % |
Sn(OH)_{3}^{-} / % |
4.0 |
27 |
10 |
1 |
35 |
27 |
0 |
4.5 |
8 |
3 |
0 |
29 |
60 |
0 |
5.0 |
0 |
0 |
0 |
15 |
85 |
0 |
5.5 |
0 |
0 |
0 |
5 |
95 |
0 |
6.0 |
0 |
0 |
0 |
3 |
97 |
0 |
6.5 |
0 |
0 |
0 |
1 |
99 |
0 |
7.0 |
0 |
0 |
0 |
0 |
100 |
0 |
7.5 |
0 |
0 |
0 |
0 |
99 |
1 |
8.0 |
0 |
0 |
0 |
0 |
98 |
2 |
8.5 |
0 |
0 |
0 |
0 |
95 |
5 |
9.0 |
0 |
0 |
0 |
0 |
80 |
20 |
9.5 |
0 |
0 |
0 |
0 |
50 |
50 |
10.0 |
0 |
0 |
0 |
0 |
30 |
30 |
recovery of data: 95%
Martyak reports for the hydrolysis reaction of stannos sulfate a free energy of %DELTA G = -7.37 kcal/mol and a equilibrium constant of ~1.8 x 10^5.
Applicant's summary and conclusion
- Validity criteria fulfilled:
- yes
- Conclusions:
- Tin(II) can be hydrolysed into SnOH^{+}, Sn(OH)_{2} and Sn(OH)^{-}_{3}. In The pH frame according the guideline most of the Sn(II) exists as
Sn(OH)_{2}. The equilibrium constant for the dissioziation logK = 7.8 +/- 0.2 (@20°C)..
Martyak reports for the hydrolysis reaction of stannos sulfate a free energy of %DELTA G = -7.37 kcal/mol and a equilibrium constant of ~1.8 x 10^5.
So the stannous sulfate ist not stable in water. Under alkaline conditions (pH>8 ) changes immediately oxidation state 2 to 4.
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