Registration Dossier
Registration Dossier
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EC number: 215-199-1 | CAS number: 1312-76-1
Viscosity
Administrative data
Link to relevant study record(s)
- Endpoint:
- viscosity
- Data waiving:
- study scientifically not necessary / other information available
- Justification for data waiving:
- other:
- Endpoint:
- viscosity
- Type of information:
- other: Secondary data from review article
- Adequacy of study:
- other information
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- other: Collection of data
- Guideline:
- other: no data
- Key result
- Temp.:
- 20°C
- Parameter:
- dynamic viscosity (in mPa s)
- Value:
- >= 50 - <= 280
- Endpoint:
- viscosity
- Type of information:
- other: Handbook data
- Adequacy of study:
- other information
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- other: Handbook data
- Principles of method if other than guideline:
- Handbook data, no information on test details.
- Key result
- Temp.:
- 20°C
- Parameter:
- dynamic viscosity (in mPa s)
- Value:
- >= 30 - <= 200
Referenceopen allclose all
In addition to the temperature, the viscosity of a potassium silicate solution depends to a large degree on the concentration and the molar ratio SiO2/K2O.
For typical commercial silicate solutions the following viscosities are observed:
Solids content Molar ratio Viscosity
% SiO2/K2O mPa.s at 20°C
-------------------------------------------------
29.1 4.06 50
34.4 3.46 45
39.5 3.28 950 (at 25°C)
40.5 3.14 280
41.1 2.87 45
RM-Freetext:
In addition to the temperature, the viscosity of a potassium silicate solution depends to a large degree on the concentration and the molar ratio SiO2/K2O.
Viscosities reported for typical commercial silicate solutions:
Total solids Molar ratio Viscosity
wt % SiO2/K2O mPa.s at 20°C
-------------------------------------------------
29.9 3.89 180
34.8 3.21 30
52.4 2.24 200
Description of key information
Not applicable for solids.
Key value for chemical safety assessment
Additional information
The test substance is a solid material.
The aqueous solutions (of different concentrations, and with different K2O / SiO2 molar ratios) indicate to have a dynamic viscosity of 30 - 280 mPa * s, at 20 °C.
At 25 °C a dynamic viscosity of 950 mPa * s was determined for an aqueous solution with MR = 3.28.
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