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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Administrative data

Hazard for aquatic organisms

Freshwater

Hazard assessment conclusion:
PNEC aqua (freshwater)
PNEC value:
10 mg/L
Assessment factor:
1 000
Extrapolation method:
assessment factor
PNEC freshwater (intermittent releases):
100 mg/L

Marine water

Hazard assessment conclusion:
PNEC aqua (marine water)
PNEC value:
1 mg/L
Assessment factor:
10 000
Extrapolation method:
assessment factor

STP

Hazard assessment conclusion:
no data: aquatic toxicity unlikely

Sediment (freshwater)

Hazard assessment conclusion:
no hazard identified

Sediment (marine water)

Hazard assessment conclusion:
no hazard identified

Hazard for air

Air

Hazard assessment conclusion:
no hazard identified

Hazard for terrestrial organisms

Soil

Hazard assessment conclusion:
no hazard identified

Hazard for predators

Secondary poisoning

Hazard assessment conclusion:
no potential for bioaccumulation

Additional information

Aquatic toxicity

Acute toxicity or growth inhibition endpoints are available for fish, Daphnia and algae for both silicon dioxide (SAS) and sodium aluminium silicate (NAS). SAS and NAS are being used as read across materials for magnesium silicate. For each of the study types the 96, 72 or 24 hour endpoint is the same > 10 000 mg/L.   There are no chronic aquatic toxicity data presented due to the known inherent physico-chemical properties, absence of acute toxic effects as well as the ubiquitous presence of silica/silicates in the environment, there is no evidence of harmful long-term effects arising from exposure to amorphous silica.

Terrestrial and sediment toxicity

SiO2 and silicates are naturally abundant as minerals. Terrestrial organisms are constantly exposed to these materials.  Therefore testing is not required and no data is presented. Additionally the substance is classified as not harmful to the environment. Testing with aquatic organisms has demonstrated negligible toxicity, therefore testing is not required and no data for sediment dwelling organisms is presented. 

Conclusion on classification

No classification as to environmental hazards required.