Silicic acid, sodium salt

Distribution modelling

Administrative data

Endpoint:

distribution modelling

Data waiving:

study scientifically not necessary / other information available

Justification for data waiving:

other:

Data source

Reference

Reference Type:

review article or handbook

Title:

Silicon compounds - Synthetic inorganic silicates.

Author:

Falcone JS

Year:

1997

Bibliographic source:

Kirk-Othmer Encyclopedia of Chemical Technology, 4th ed. Wiley, New York, USA. 22, 1-30.

Materials and methods

Model:

other: General conclusion based on theoretical considerations

Test material

Test material information

Constituent 1

Reference substance name:

Silicic acid, sodium salt

EC Number:

215-687-4

EC Name:

Silicic acid, sodium salt

Cas Number:

1344-09-8

Molecular formula:

Na2O x (SiO2)n with Molar Ratio (MR) (SiO2/Na2O): 1.5 – 4

IUPAC Name:

sodium hydroxy(oxo)silanolate

Results and discussion

Any other information on results incl. tables

RM-Freetext:
Due to a strong dependance on pH and concentration which leads to a  complex dynamic polymerisation-depolymerisation equilibrium with  speciation into a variety of mono-, oligo-, and polymeric anions and  amorphous silica, calculations on the distribution in various  environmental compartments are not feasible.
The contribution of anthropogenic inputs to the occurrence in the various  compartments will be negligible compared to the concentrations  contributed to by the natural silica flux.