Registration Dossier

Data platform availability banner - registered substances factsheets

Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

Diss Factsheets

Environmental fate & pathways

Additional information on environmental fate and behaviour

Currently viewing:

Administrative data

Endpoint:
additional information on environmental fate and behaviour
Type of information:
read-across based on grouping of substances (category approach)
Adequacy of study:
other information
Justification for type of information:
Refer to category justification provided in IUCLID section 13.
Cross-reference
Reason / purpose for cross-reference:
read-across source
Reference
Endpoint:
additional toxicological information
Type of information:
other: General exposure considerations
Adequacy of study:
other information
Qualifier:
no guideline required

The average intake of silicon is 20-50 mg total Si/d (Pennington, 1991). An estimation of 0.31 mg Si/kg bw/d in
females and 0.53 mg Si/kg bw/d in males made in an American study, is representative for the intake in the Western
world. While the highest concentrations of total silicon are found in seafood, eggs and diary products; the main dietary
sources are cereals and beverages.

Data source

Materials and methods

Test material

Constituent 1
Chemical structure
Reference substance name:
Disodium metasilicate
EC Number:
229-912-9
EC Name:
Disodium metasilicate
Cas Number:
6834-92-0
Molecular formula:
H2O3Si.2Na Soluble Silicates Category
IUPAC Name:
disodium oxosilanediolate

Results and discussion

Any other information on results incl. tables

RM-Freetext:
Polymerisation-Depolymerisation:
Upon dilution of concentrated commercial silicate solutions
with water, the highly cross-linked polysilicate ions
depolymerize rapidly to monosilicate ions, the extent of
depolymerisation depending on the dilution factor.

Applicant's summary and conclusion