Identification
Product identifiers, regulatory numbers, and supplier information
Product Information
- Product Name
- Silicon
Regulatory Identifiers
- CAS Number
- N/A
- REACH No.
- 01-2119480401-47-0287
Identified Uses
Alloying into aluminium, Production of silicones (siloxanes) via (CH₃)₂SiCl₂, Production of electronic grade silicon via HSiCl₃, Production of synthetic amorphous silica via SiCl₄, Other industrial applications.
Manufacturers & Suppliers
PCC BakkiSilicon hf
manufacturer
Bakkavegur 2, 640 Húsavík
+354 4640060
http://www.pcc.is
Hazard Identification
GHS classification, signal word, pictograms, and hazard statements
GHS Pictograms
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Composition / Information on Ingredients
Chemical components, concentration ranges, and hazardous substance identification
| Chemical Name | CAS Number | Concentration | Hazardous |
|---|---|---|---|
| Silicon EC: 231-130-8 | 7440-21-3 | --- | No |
First Aid Measures
Emergency procedures for chemical exposure incidents
Fresh air.
Symptoms: Irritation caused by dust
Wash contaminated skin with water and/or mild detergent
Rinse eyes with water/saline solution. If discomfort persists, obtain medical attention.
Remove the person affected from the dust-exposed area. See inhalation.
Firefighting Measures
Extinguishing media, specific hazards, and firefighter protection
Dry sand, CO₂ or dry powder.
Lump silicon is not combustible. Dusts of silicon with particle diameter < 75 µm can be ignited and will propagate flame. Silicon dust suspended in air may under certain conditions cause dust explosions.
Accidental Release Measures
Spill cleanup procedures, containment, and environmental protection
Released material should be collected in suitable containers. Dry dust can be vacuumed or swept up.
Related Products
Similar products with comparable safety profiles
Handling and Storage
Safe handling precautions, storage conditions, and workplace requirements
Avoid dust generation. Avoid ignition sources (e.g. welding) in areas with high dust concentrations. Addition of wet material to molten silicon may cause explosions.
Keep product dry.
Avoid ignition sources (e.g. welding) in areas with high dust concentrations.
Exposure Controls / PPE
Occupational exposure limits, engineering controls, and protective equipment
Adequate ventilation
Use protective gloves
Use eye protection
Wear a particulate respirator according to EN 149 FFP 2S in areas of inadequate ventilation.
Target value and limit value for PM10 and PM2.5 (Directive 2008/50/EC): PM10 (One day: 50 μg/m³*, Calendar year: 40 μg/m³), PM2.5 (Calendar year: 25 μg/m³). *Not to be exceeded more than 35 times a calendar year.
Physical and Chemical Properties
Appearance, physical state, melting point, boiling point, and material characteristics
Stability and Reactivity
Chemical stability, hazardous reactions, and incompatible materials
Silicon is insoluble in most acids, but dissolves in a mixture of hydrofluoric acid (HF) and nitric acid (HNO3) evolving hazardous gases. Impurities present in silicon (e.g. Al and Ca) may react with dilute acids evolving hazardous gases. Silicon dissolves readily in dilute lye.
Silicon-particles suspended in air at concentrations above 100 g/m³ can cause dust explosions. Addition of wet material to molten silicon may cause explosions.
Avoid generating sparks or other ignition sources (e.g. welding) in areas with high dust concentrations. Addition of wet material to molten silicon may cause explosions.
Acids (hydrofluoric acid, nitric acid), dilute lye.
A reaction with hydrofluoric acid (HF) and nitric acid (HNO3) leads to the formation of toxic gases such as silicon tetrafluoride (SiF4) or nitrous gases (NOx). Impurities in silicon may react with dilute acids forming flammable and harmful gases such as hydrogen (H2) and silane (SiH4). Wet product will form flammable hydrogen gas if added to molten silicon, due to decomposition of water.
Ecological Information
Environmental toxicity, biodegradation, and bioaccumulation data
The data for this section has not been processed yet.
Disposal Considerations
Waste treatment methods, disposal recommendations, and waste codes
The material should be recovered for recycling if possible.
Dispose of waste product according to applicable federal, state and local rules for non-hazardous solid waste materials.
Transport Information
UN numbers, shipping names, transport classes, and regulatory requirements
- UN Number
- Not applicable
Regulatory Information
Chemical regulations, safety assessments, and compliance status
Frequently Asked Questions
Common questions about safety, handling, and properties
What is the hazard signal word for Silicon?
The signal word is no signal word.
What is the physical form of Silicon?
Silicon is a crystalline appearing as silvery material with silvery color. It has odourless odor.
What is Silicon used for?
Alloying into aluminium, Production of silicones (siloxanes) via (CH₃)₂SiCl₂, Production of electronic grade silicon via HSiCl₃, Production of synthetic amorphous silica via SiCl₄, Other industrial applications.
What is the melting point of Silicon?
The melting point is Approx. 1410°C and the boiling point is Approx. 2355°C.