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Manufacture, use & exposure

Manufacture

Manufacture

Registration/ Notification status for the use:
use registered according to REACH Article 10; total tonnage manufactured/imported >=10tonnes/year per registrant
Manufacture name:
Synthesis of Silicic acid, aluminum magnesium sodium salt
Reference
Name:
Silicic acid, aluminium magnesium sodium salt, CAS-No. 12040-43-6
Type of composition:
legal entity composition of the substance
State / form:
solid: nanoform
Related composition:
Silicic acid, aluminium magnesium sodium salt, CAS-No. 12040-43-6
Reference substance:
Silicic acid, aluminium magnesium sodium salt, CAS-No. 12040-43-6
Reference substance:
Silicic acid, aluminium magnesium sodium salt, CAS-No. 12040-43-6
Type of information reported:
single nanoform
Name of nanoform:
Silicic acid, aluminium magnesium sodium salt (SMAS), precipitated
Shape category:
spheroidal
Shape:
other: 3-dimensional branched fractal aggregates
Pure shape:
yes
Typical composition:
>= 99 %
Range:
>= 99 - <= 100 %
Shape category:
spheroidal
Remarks:
3-dimensional branched fractal aggregates.
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 %
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
Typical specific surface area:
57.9 m²/g
Range of specific surface area:
>= 55 - <= 115 m²/g
Surface treatment applied:
no
Contributing activity / technique for the environment
Environmental release category (ERC):
ERC1: Manufacture of the substance
Contributing activity / technique for workersopen allclose all
Process category (PROC):
PROC 2: Chemical production or refinery in closed continuous process with occasional controlled exposure or processes with equivalent containment conditions
Process category (PROC):
PROC 3: Manufacture or formulation in the chemical industry in closed batch processes with occasional controlled exposure or processes with equivalent containment conditions
Process category (PROC):
PROC 4: Chemical production where opportunity for exposure arises
Process category (PROC):
PROC 8a: Transfer of substance or mixture (charging and discharging) at non-dedicated facilities
Process category (PROC):
PROC 8b: Transfer of substance or mixture (charging and discharging) at dedicated facilities
Process category (PROC):
PROC 9: Transfer of substance or mixture into small containers (dedicated filling line, including weighing)
Related assessment:
use assessed in a joint CSR