Registration Dossier

Identification

Chemical structure
Display Name:
Silicic acid, aluminum magnesium sodium salt
EC Number:
234-919-5
EC Name:
Silicic acid, aluminum magnesium sodium salt
CAS Number:
12040-43-6
Molecular formula:
Na(0.017-1.739)Mg(0.008-0.823)Al(0.002-0.2473)SiO(2.018-3.837)
IUPAC Name:
aluminium(3+) magnesium(2+) sodium tris(oxosilanebis(olate))

Type of substance

Composition:
UVCB
Origin:
inorganic

Total tonnage band

Total range:
≥ 10 000 to < 100 000 tonnes

REACH

Registered as:
FULL
Submitted:
Joint Submission

Publication dates

First published:
18-Apr-2011
Last modified:
17-Nov-2020

Chemical safety assessment

Performed for this substance:
YES

Compositions open all close all

Type:
legal entity composition of the substance
State Form:
solid: nanoform


Constituent 1
Chemical structure
Reference substance name:
Silicic acid, aluminum magnesium sodium salt
EC Number:
234-919-5
EC Name:
Silicic acid, aluminum magnesium sodium salt
CAS Number:
12040-43-6
Molecular formula:
Na(0.017-1.739)Mg(0.008-0.823)Al(0.002-0.2473)SiO(2.018-3.837)
IUPAC Name:
aluminium(3+) magnesium(2+) sodium tris(oxosilanebis(olate))
Constituent 2
Chemical structure
Reference substance name:
Sodium sulphate
EC Number:
231-820-9
EC Name:
Sodium sulphate
CAS Number:
7757-82-6
Molecular formula:
H2O4S.2Na
IUPAC Name:
disodium sulfate

Characterisation of nanoforms

Type of information reported:
single nanoform
Name of nanoform:
Silicic acid, aluminium magnesium sodium salt (SMAS), precipitated

Shape

Shape description
Shape category:
spheroidal
Shape:
other: 3-dimensional branched fractal aggregates
Pure shape:
yes
Typical composition:
>= 99 %
Range:
>= 99 - <= 100 %

Particle size distribution and range

Particle size distribution and range
Shape category:
spheroidal
Remarks:
3-dimensional branched fractal aggregates.
Percentileopen allclose all
Percentile:
D10
Typical value:
66 μm
Range:
>= 63 - <= 125 μm
Percentile:
D50
Typical value:
92 μm
Range:
>= 63 - <= 125 μm
Percentile:
D90
Typical value:
119 μm
Range:
>= 63 - <= 125 μm
Additional information:
The particle forming mechanism for each manufacturing process starts with the formation of liquid nuclei that grow to constituent particles that coagulate to aggregates and solidify. Constituent particles are therefore spherical in nature while aggregates (and agglomerates) show a high fractal structure.
Fraction of constituent particles in the size range 1-100 nm:
> 50 - <= 100 %

Crystallinity

Structures
Structure:
amorphous
Name:
amorphous
Pure structure:
yes
Range:
> 99.7 - <= 100 %
Description:
not crystalline according to TEM and XRD, see sections 1.4 and 4.5

Specific surface area

Typical specific surface area:
57.9 m²/g
Range of specific surface area:
>= 55 - <= 115 m²/g

Surface functionalisation / treatment

Surface treatment applied:
no
Type:
legal entity composition of the substance


Constituent 1
Chemical structure
Reference substance name:
Silicic acid, aluminum magnesium sodium salt
EC Number:
234-919-5
EC Name:
Silicic acid, aluminum magnesium sodium salt
CAS Number:
12040-43-6
Molecular formula:
Na(0.017-1.739)Mg(0.008-0.823)Al(0.002-0.2473)SiO(2.018-3.837)
IUPAC Name:
aluminium(3+) magnesium(2+) sodium tris(oxosilanebis(olate))
Type:
boundary composition of the substance
State Form:
solid: nanoform


Constituent 1
Chemical structure
Reference substance name:
Silicic acid, aluminum magnesium sodium salt
EC Number:
234-919-5
EC Name:
Silicic acid, aluminum magnesium sodium salt
CAS Number:
12040-43-6
Molecular formula:
Na(0.017-1.739)Mg(0.008-0.823)Al(0.002-0.2473)SiO(2.018-3.837)
IUPAC Name:
aluminium(3+) magnesium(2+) sodium tris(oxosilanebis(olate))

Characterisation of nanoforms

Type of information reported:
single nanoform
Name of nanoform:
Silicic acid, aluminium magnesium sodium salt (SMAS), precipitated

Shape

Shape description
Shape category:
spheroidal
Shape:
other: 3-dimensional branched fractal aggregates
Pure shape:
yes
Typical composition:
>= 99 %
Range:
> 50 - <= 100 %

Particle size distribution and range

Particle size distribution and range
Shape category:
spheroidal
Percentileopen allclose all
Percentile:
D90
Typical value:
ca. 120 μm
Range:
> 55 - < 130 μm
Percentile:
D50
Typical value:
ca. 90 μm
Range:
> 55 - < 130 μm
Percentile:
D10
Typical value:
ca. 66 μm
Range:
> 55 - < 130 μm
Fraction of constituent particles in the size range 1-100 nm:
> 50 - <= 100 %

Crystallinity

Structures
Structure:
amorphous
Pure structure:
yes

Specific surface area

Typical specific surface area:
ca. 60 m²/g
Range of specific surface area:
> 25 - < 150 m²/g

Surface functionalisation / treatment

Surface treatment applied:
no

Registrants / Suppliers Details open all close all

Registrant / Supplier Registered Updated
Evonik Operations GmbH - Si 05 Rellinghauser Straße 1 - 11 45128 Essen Germany 2010
Evonik Silica Finland Oy Telakkatie 5 49460 Hamina Finland 2010
GRACE GmbH In der Hollerhecke 1 67545 Worms Germany 2009 2010
GRACE Silica GmbH Kreuzauer Str. 46 52355 Düren Germany 2009 2009; 2020

Administrative data open all close all

  • 01-2119403714-47-0000
  • 01-2119403714-47-0001
  • 01-2119403714-47-0002
  • 01-2119403714-47-0003

Contact Persons responsible for the SDS