SILICON, WG SILICON, SIL 97

Remove person from dust exposed area and give fresh air.

Symptoms: Mechanical irritation caused by dust in the airways.

Wash with water and soap. In case of burns due to liquid metal, rinse well with water.

Symptoms: Generally, the product does not irritate the skin.

Rinse cautiously with water or an ocular solution.

Symptoms: reddening and heavy watering of the eyes

Remove source of further ingestion.

Dry sand, dry inert powder, CO2.

Water, fire extinguishing media with high pressure jet.

Particles suspended in air may under certain conditions cause dust explosions. Although flammability test under REACH (EC guideline) shows silicon to be non-flammable, small silicon particles (< 40 micrometers) could be ignited by an ignition source and propagate flame that extinguish quickly. The flammability and intensity of the blast increases gradually as particle size decreases. Contact between water and molten metal (by accidental spill, addition of wet materials, use of wet tools, ...) can cause an explosion: physical phenomenon of steam explosion and chemical phenomenon of flammable hydrogen gas formation.

Avoid dust build-up or handling that generates particles suspended in air (risk of dust explosion). Ensure adequate ventilation. Do not smoke. Avoid skin and eye contact. Avoid dust inhalation.

Keeping away from drains, surface and ground water.

Dried dust can be swept up.

Wear appropriate work clothes, gloves and eye protection (and a respiratory protection in case of particles dispersion in the air). Never add wet material to molten materials (especially the addition of wet material in a melting furnace) : risk of explosion, see section 10.

Store in a dry well-ventilated area. Protect against air humidity. Store far from water and dampness (avoid places easily flooded, close to water or steam pipe work). Store far from acid or basic solutions. Store in original packaging or in areas designated for this purpose in the case of bulk material. Check for damaged packaging prior to storage.

Avoid flames, sparks or other ignition source (welding, oxycutting...) in dusty areas.

Closed system without dust and local exhaust ventilation for dusty operations.

Protective gloves

Safety glasses

When handling the product dust or during intervention in areas where ventilation is poor, use a respiratory protection suitable for protection against dust (P2).

Work clothes. Do not blow the work clothes in order to clean it.

The limit values for particles (PM 2,5 and PM 10) in the ambient air (Directive 1999/30/EC and its further amendments) have to be implemented.

Under normal conditions, the product is stable.

The product may react with water, dampness, acids or bases.

No dangerous reactions when handling and storage in accordance with the provisions.

Dust may cause a risk of explosive atmosphere (over 60 g/m3 in air for dust composed of 50% or more of particles < 45 μm). The presence of ignition sources in areas with a high concentration of dust creates a risk of dust explosion.

Avoid non-mastered contact with water, dampness, acids or bases.

In contact with bases, may release hydrogen H2 (flammable gas). In contact with acids, water or dampness, may release very small quantities of hydrogen H2 (flammable gas). The reaction with hydrofluoric acid (HF) and nitric acid (HNO3) leads to the formation of toxic gases such as silicon tetrafluoride (SiF4) or nitrogen oxides (NOx).