Registration Dossier

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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Marine water

Hazard assessment conclusion:
no hazard identified

STP

Hazard assessment conclusion:
no hazard identified

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

The conclusions apply to high-grade purity silica fume. (as presented in section 1.2: Composition of the substance). Heavy metal and organic impurities present in lower grades of silica fume may have remarkable effects relevant for the soil compartment. These contaminants must be dealt with separately by producers and importers and evaluated on a case-by-case basis, according to presented information regarding specific products/batches and uses. Companies should have regular control over the levels of hazardous impurities and update the RMM, MSD and CSA accordingly. For silica fume, the impurities present in the substances rather than the Si need consideration if exposure to soil takes place. The amount and quality of the impurities vary between the raw materials, processes and factories. In estimating the hazard and risks involved in these metals or other impurities, the read-across method may be utilized on a case-by-case basis by applying the already existing hazard data and PNEC soil values applicable to these metals and other elements.

Conclusion on classification

Proposed preliminary classifications for Silica Fume grades (1 HG and 2 LG). For details on the grades, please see the substance identification and compositional data.

1. Silica Fume, high grade No environmental classification is proposed for Silica fume, high grade.

2. Silica Fume, low grade

Preliminary Environmental Classification is proposed for Silica fume, low grade (see proposal and justification below).

CLP classification for LG

 

According to Annex IV of the Guidance on the Application of the CLP Criteria, where data from dissolution protocol is available, then the results should be used to aid classification according to the rules given in the Guidance to Regulation (EC) No 1272/2008 on the classification, labelling and packaging of substances and mixtures, (ECHA-09-G-02-EN) (CLP (2009)).

 

We can consider the dissolved Zn concentration of silica fume LG (311-468 µg/l) after a 24 hr T/D test at the high loading rate (100 mg/l). The Zn L(E)C50 values are lower (0.07-0.86 mg/l forDaphnia magnaref: EU ERA Zn- final - May 2008) than the Zn concentration and, following the given rules for classification, the LG silica fume needs to be classified in the Aquatic Acute 3/Aquatic Chronic 2 or 3 Category. Long term Daphnia is ongoing so as to validate or not the above conclusions.