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Silicon is the most abundant electropositive element in The Earth's crust. It is a tetravalent metalloid, more reactive than germanium, the metalloid directly below it in the table.
Symbol: Si
Atomic number: 14
Atomic weight: 28.0855
Allotropes: amorphous Si, crystalline Si
Silicon is the most abundant electropositive element in The Earth's crust. It is a tetravalent metalloid, more reactive than germanium, the metalloid directly below it in the table.
Amorphous silicon appears as a brown powder while crystalline silicon has a metallic luster and a grayish color. Single crystals of crystalline silicon can be grown with a process known as the Czochralski process. Silicon carbide (SiC) is nearly as hard as diamond and is used as an abrasive. Silicon nitride is used in rotating bearing balls & rollers, cutting tools, engine moving & wear parts, turbine blades, vanes & buckets, metal tube forming rolls & dies, etc.
Stanford Advanced Materials (SAM) now can provide various silicon products including:
Silicon Metal in the lump, ingot, plate, sheet, and powder, purity from 4N to 6N.
Silicon Carbide products including tube, plate, rod, ball, and other shapes used for various applications.
Silicon nitride is used in rotating bearing balls & rollers, cutting tools, engine moving & wear parts, turbine blades, vanes & buckets, metal tube forming rolls & dies, etc.
Various silicon evaporation materials, micro & nano silicon powder.
Diverse Applications: Silicon's exceptional properties make it a foundational material in numerous applications. From electronics and solar cells to semiconductors and advanced technologies, our silicon products empower industries with their wide-ranging capabilities.
Crucial in Electronics: Silicon's semiconducting properties are pivotal to the electronics industry, enabling the creation of transistors, integrated circuits, and other essential components.
Thermal and Electrical Conductivity: Silicon exhibits excellent thermal and electrical conductivity, making it an ideal choice for applications that require efficient heat dissipation and electrical performance.
Precision and Purity: Quality is integral to our silicon products. We adhere to strict industry standards and meticulous specifications, ensuring that our silicon maintains the purity necessary for superior performance and consistent results.
Technical Expertise: Our team possesses profound knowledge of the properties and applications of silicon. We offer personalized technical support and guidance, assisting you in leveraging Silicon's unique characteristics for your specific needs.
Reliable Supply: We recognize the importance of a consistent supply of silicon. Our global presence and efficient logistics ensure that you have access to silicon products when and where you need them.
SAM offers a range of silicon products that cater to diverse applications, including:
Semiconductors: Silicon is the cornerstone of modern semiconductor technology, driving the performance of computers, smartphones, and countless electronic devices.
Solar Cells: Silicon-based solar cells are integral to the renewable energy revolution, converting sunlight into electricity with high efficiency.
Advanced Technologies: Silicon's versatility extends to advanced technologies such as MEMS (Micro-Electro-Mechanical Systems) and sensors, contributing to innovations in medical devices and automotive systems.
Related video:
| Signal Word | Warning |
| Hazard Statements | H228 |
| Hazard Codes | F |
| Risk Codes | 11 |
| Safety Precautions | 16-33-36 |
| RTECS Number | VW0400000 |
| Transport Information | UN 1346 4.1/PG 3 |
| WGK Germany | 2 |
| Globally Harmonized System of Classification and Labelling (GHS) | flame.png |
Product Name: Silicon Metal
CAS #: 7440-21-3
Relevant identified uses of the substance: Scientific research and development
Supplier details:
Stanford Advanced Materials
E-mail: sales@samaterials.com
Tel: (949) 407-8904
Address: 23661 Birtcher Dr., Lake Forest, CA 92630 U.S.A.
Classification of the substance or mixture
Classification according to Regulation (EC) No 1272/2008
The substance is not classified as hazardous to health or the environment according to the CLP
regulation.
Classification according to Directive 67/548/EEC or Directive 1999/45/EC
N/A
Information concerning particular hazards for human and environment:
No data available
Hazards not otherwise classified
No data available
Label elements
Labelling according to Regulation (EC) No 1272/2008
N/A
Hazard pictograms
N/A
Signal word
N/A
Hazard statements
N/A
WHMIS classificationNot controlled
Classification system
HMIS ratings (scale 0-4)
(Hazardous Materials Identification System)
HEALTH
FIRE
REACTIVITY
1
0
0
Health (acute effects) = 1
Flammability = 0
Physical Hazard = 0
Other hazards
Results of PBT and vPvB assessment
PBT:
N/A
vPvB:
N/A
Substances
CAS No. / Substance Name:
7440-21-3 Silicon
Identification number(s):
EC number:
231-130-8
Description of first aid measures
General information
No special measures required.
If inhaled:
Seek medical treatment in case of complaints.
In case of skin contact:
Generally the product does not irritate the skin.
In case of eye contact:
Rinse opened eye for several minutes under running water. If symptoms persist, consult a doctor.
If swallowed:
If symptoms persist consult doctor.
Information for doctor
Most important symptoms and effects, both acute and delayed
No data available
Indication of any immediate medical attention and special treatment needed
No data available
Extinguishing media
Suitable extinguishing agents
Carbon dioxide, extinguishing powder or water spray. Fight larger fires with water spray or alcohol
resistant foam.
Special hazards arising from the substance or mixture
If this product is involved in a fire, the following can be released:
Silicon oxide
Advice for firefighters
Protective equipment:
No special measures required.
Personal precautions, protective equipment and emergency procedures
Not required.
Environmental precautions:
Do not allow material to be released to the environment without official permits.
Do not allow product to enter drains, sewage systems, or other water courses.
Do not allow material to penetrate the ground or soil.
Methods and materials for containment and cleanup:
Pick up mechanically.
Prevention of secondary hazards:
No special measures required.
Reference to other sections
See Section 7 for information on safe handling
See Section 8 for information on personal protection equipment.
See Section 13 for disposal information.
Handling
Precautions for safe handling
Keep container tightly sealed.
Store in cool, dry place in tightly closed containers.
Information about protection against explosions and fires:
No special measures required.
Conditions for safe storage, including any incompatibilities
Requirements to be met by storerooms and receptacles:
No special requirements.
Information about storage in one common storage facility:
No data available
Further information about storage conditions:
Keep container tightly sealed.
Store in cool, dry conditions in well-sealed containers.
Specific end use(s)
No data available
Additional information about design of technical systems:
No further data; see section 7.
Control parameters
Components with limit values that require monitoring at the workplace:
7440-21-3 Silicon (100.0%)
PEL (USA) Long-term value: 15* 5** mg/m
3
*total dust **respirable fraction
REL (USA) Long-term value: 10* 5** mg/m
3
*total dust **respirable fraction
TLV (USA) TLV withdrawn
EL (Canada) Long-term value: 10 mg/m
3
EV (Canada) Long-term value: 10 mg/m
3
total dust
Additional information:
No data
Exposure controls
Personal protective equipment
Follow typical protective and hygienic practices for handling chemicals.
Maintain an ergonomically appropriate working environment.
Breathing equipment:
Not required.
Protection of hands:
Not required.
Penetration time of glove material (in minutes)
No data available
Eye protection:
Safety glasses
Body protection:
Protective work clothing.
Information on basic physical and chemical properties
Appearance:
Form: Solid in various forms
Color: No data available
Odor: Odorless
Odor threshold: No data available.
pH: N/A
Melting point/Melting range: 1423 °C (2593 °F)
Boiling point/Boiling range: 2355 °C (4271 °F)
Sublimation temperature / start: No data available
Flammability (solid, gas)
No data available.
Ignition temperature: No data available
Decomposition temperature: No data available
Autoignition: No data available.
Danger of explosion: No data available.
Explosion limits:
Lower: No data availableUpper: No data available
Vapor pressure: N/A
Density at 20 °C (68 °F): 2.33 g/cm
3
(19.444 lbs/gal)
Relative density
No data available.
Vapor density
N/A
Evaporation rate
N/A
Solubility in Water (H
2
O): No data available
Partition coefficient (n-octanol/water): No data available.
Viscosity:
Dynamic: N/A
Kinematic: N/A
Other information
No data available
Reactivity
No data available
Chemical stability
Stable under recommended storage conditions.
Thermal decomposition / conditions to be avoided:
Decomposition will not occur if used and stored according to specifications.
Possibility of hazardous reactions
No dangerous reactions known
Conditions to avoid
No data available
Incompatible materials:
Oxidizing agents
No data available
Hazardous decomposition products:
Silicon oxide
Information on toxicological effects
Acute toxicity:
The Registry of Toxic Effects of Chemical Substances (RTECS) contains acute toxicity data for
components in this product.
LD/LC50 values that are relevant for classification:
Oral LD50 3160 mg/kg (rat)
Skin irritation or corrosion:
No irritant effect.
Eye irritation or corrosion:
No irritant effect.
Sensitization:
No sensitizing effects known.
Germ cell mutagenicity:
No effects known.Carcinogenicity:
No classification data on carcinogenic properties of this material is available from the EPA, IARC,
NTP, OSHA or ACGIH.
Reproductive toxicity:
No effects known.
Specific target organ system toxicity - repeated exposure:
No effects known.
Specific target organ system toxicity - single exposure:
No effects known.
Aspiration hazard:
No effects known.
Subacute to chronic toxicity:
The Registry of Toxic Effects of Chemical Substances (RTECS) contains multiple dose toxicity data for
this substance.
Additional toxicological information:
To the best of our knowledge the acute and chronic toxicity of this substance is not fully known.
Toxicity
Aquatic toxicity:
No data available
Persistence and degradability
No data available
Bioaccumulative potential
No data available
Mobility in soil
No data available
Additional ecological information:
Do not allow material to be released to the environment without official permits.
Do not allow undiluted product or large quantities to reach groundwater, water courses, or sewage
systems.
Avoid transfer into the environment.
Results of PBT and vPvB assessment
PBT:
N/A
vPvB:
N/A
Other adverse effects
No data available
Waste treatment methods
Recommendation
Consult official regulations to ensure proper disposal.
Uncleaned packagings:
Recommendation:
Disposal must be made according to official regulations.
UN-Number
DOT, ADN, IMDG, IATA
N/A
UN proper shipping name
DOT, ADN, IMDG, IATA
N/A
Transport hazard class(es)
DOT, ADR, ADN, IMDG, IATA
Class
N/A
Packing group
DOT, IMDG, IATA
N/A
Environmental hazards:
N/A
Special precautions for user
N/A
Transport in bulk according to Annex II of MARPOL73/78 and the IBC Code
N/A
Transport/Additional information:
DOT
Marine Pollutant (DOT):
No
Safety, health and environmental regulations/legislation specific for the substance or mixture
National regulations
All components of this product are listed in the U.S. Environmental Protection Agency Toxic
Substances Control Act Chemical substance Inventory.
All components of this product are listed on the Canadian Domestic Substances List (DSL).
SARA Section 313 (specific toxic chemical listings)
Substance is not listed.
California Proposition 65
Prop 65 - Chemicals known to cause cancer
Substance is not listed.
Prop 65 - Developmental toxicity
Substance is not listed.
Prop 65 - Developmental toxicity, female
Substance is not listed.
Prop 65 - Developmental toxicity, male
Substance is not listed.
Information about limitation of use:
For use only by technically qualified individuals.
Other regulations, limitations and prohibitive regulations
Substance of Very High Concern (SVHC) according to the REACH Regulations (EC) No. 1907/2006.
Substance is not listed.
The conditions of restrictions according to Article 67 and Annex XVII of the Regulation (EC) No
1907/2006 (REACH) for the manufacturing, placing on the market and use must be observed.Substance is not listed.
Annex XIV of the REACH Regulations (requiring Authorisation for use)
Substance is not listed.
REACH - Pre-registered substances
Substance is listed
Safety Data Sheet according to Regulation (EC) No. 1907/2006 (REACH). The above information is
believed to be correct but does not purport to be all inclusive and shall be used only as a guide. The
information in this document is based on the present state of our knowledge and is applicable to the
product with regard to appropriate safety precautions. It does not represent any guarantee of the
properties of the product.
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