Name: Monocrystalline silicon
CAS: 7440-21-3
EC Number: 231-130-8
Chemical Formular: Si
Appearance: Silvery
Molecular Weight: 28.085 g/mol
Melting Point: 1687 K ​(1414 °C, ​2577 °F)
Boiling Point: 3538 K ​(3265 °C, ​5909 °F)
Density: 2.3290 g/cm3
Solubility in water: n/a
Exact Mass: 27.977 g/mol
Monoisotopic Mass: 27.977 g/mol
Topological Polar Surface Area: 0 A^2
Complexity: 0

Silicon Single Crystal
99% Monocrystalline silicon
99.5% Monocrystalline silicon
99.9% Monocrystalline silicon
99.95% Monocrystalline silicon
99.99% Monocrystalline silicon
99.999% Monocrystalline silicon
Monocrystalline silicon,customized specifications


According to the UN GHS revision 8

Version: 1.0

Creation Date: Oct 16, 2020

Revision Date: Oct 16, 2020

SECTION 1: Identification


GHS Product identifier

Product name

Monocrystalline silicon


Other means of identification

Product number

Other names


Recommended use of the chemical and restrictions on use

Identified uses

Industrial and scientific research uses.

Uses advised against

no data available


Supplier’s details


Elements China Limited


Building 2, No.5555, Shenzhuan Hwy, Shanghai , China



1.5Emergency phone number

Emergency phone number


Service hours

Monday to Friday, 9am-5pm (Standard time zone: UTC/GMT +8 hours).

SECTION 2: Hazard identification


Classification of the substance or mixture

Not classified.


GHS label elements, including precautionary statements

Pictogram(s)No symbol.
Signal word

No signal word

Hazard statement(s)


Precautionary statement(s)









Other hazards which do not result in classification

no data available

SECTION 3: Composition/information on ingredients



Chemical nameCommon names and synonymsCAS numberEC number
Monocrystalline silicon7440-21-3231-130-8

SECTION 4: First-aid measures


Description of necessary first-aid measures

If inhaled

Fresh air, rest.

Following skin contact

Rinse skin with plenty of water or shower.

Following eye contact

First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then refer for medical attention.

Following ingestion

Rinse mouth.


Most important symptoms/effects, acute and delayed

no data available


Indication of immediate medical attention and special treatment needed, if necessary

no data available

SECTION 5: Fire-fighting measures


Suitable extinguishing media

Use dry chemical, carbon dioxide or alcohol-resistant foam.


Specific hazards arising from the chemical

Combustible under specific conditions. Finely dispersed particles form explosive mixtures in air. Risk of fire and explosion on contact with halogens or oxidizing agents.


Special protective actions for fire-fighters

Use special powder, dry sand. NO hydrous agents.

SECTION 6: Accidental release measures


Personal precautions, protective equipment and emergency procedures

Sweep spilled substance into covered containers. If appropriate, moisten first to prevent dusting.


Environmental precautions

Prevent further spillage or leakage if it is safe to do so. Do not let the chemical enter drains. Discharge into the environment must be avoided.


Methods and materials for containment and cleaning up

Collect and arrange disposal. Keep the chemical in suitable and closed containers for disposal. Remove all sources of ignition. Use spark-proof tools and explosion-proof equipment. Adhered or collected material should be promptly disposed of, in accordance with appropriate laws and regulations.

SECTION 7: Handling and storage


Precautions for safe handling

NO open flames. Closed system, dust explosion-proof electrical equipment and lighting. Prevent deposition of dust. Prevent build-up of electrostatic charges (e.g., by grounding).
Handling in a well ventilated place.
Wear suitable protective clothing.
Avoid contact with skin and eyes.
Avoid formation of dust and aerosols.
Use non-sparking tools.
Prevent fire caused by electrostatic discharge steam.


Conditions for safe storage, including any incompatibilities

Separated from incompatible materials. See Chemical Dangers.

SECTION 8: Exposure controls/personal protection


Control parameters

Occupational Exposure limit values

CAS No.7440-21-3
 Limit value – Eight hoursLimit value – Short term
Australia 10 (1)  
Belgium 10  
Canada – Ontario 10  
Canada – Québec 10  
Denmark 10 inhalable aerosol 20 inhalable aerosol
France 10 respirable aerosol  
Ireland 10 (1)  
  4 (2)  
New Zealand 10 (1)  
Singapore 10  
South Korea 10  
Switzerland 3 respirable aerosol  
USA – NIOSH 10 total dust  
  5 respirable fraction  
USA – OSHA 15 total dust  
  5 respirable dust  
United Kingdom 10 inhalable aerosol  
  4 respirable aerosol  
Australia(1) This value is for inhalable dust containing no asbestos and
Ireland(1) Inhalable fraction
(2) Respirable fraction
New Zealand(1) The value for inhalable dust containing no asbestos and less than 1% free silica.

Biological limit values

no data available


Appropriate engineering controls

Ensure adequate ventilation.
Handle in accordance with good industrial hygiene and safety practice.
Set up emergency exits and the risk-elimination area.

8.3Individual protection measures, such as personal protective equipment (PPE)

Eye/face protection

Wear safety goggles.

Skin protection

Protective gloves.

Respiratory protection

Use local exhaust or breathing protection.

Thermal hazards

no data available

SECTION 9: Physical and chemical properties and safety characteristics

Physical state





no data available

Melting point/freezing point

140 °C.

Boiling point or initial boiling point and boiling range

Remarks:The substance undergoes sublimation at 245 °C.


no data available

Lower and upper explosion limit/flammability limit

no data available

Flash point

no data available

Auto-ignition temperature

no data available

Decomposition temperature

no data available


no data available

Kinematic viscosity

no data available


Insoluble in water

Partition coefficient n-octanol/water

Pow = 2.28. Temperature:20 °C. Remarks:PH not available.;log Pow = 0.357. Temperature:20 °C. Remarks:PH not available.

Vapour pressure

9.999 Pa. Temperature:20 °C. Remarks:Info taken from the Hazardous Substance Fact Sheet published by the New Jersy Department of Health and Senior Services.;0.075 mm Hg. Temperature:20 °C. Remarks:Info taken from the Hazardous Substance Fact Sheet published by the New Jersy Department of Health and Senior Services.

Density and/or relative density

2.01 dimensionless.

Relative vapour density

no data available

Particle characteristics

no data available

SECTION 10: Stability and reactivity



no data available


Chemical stability

no data available


Possibility of hazardous reactions

Dust explosion possible if in powder or granular form, mixed with air. If dry, it can be charged electrostatically by swirling, pneumatic transport, pouring, etc.Reacts violently with oxidants, halogens, metal carbonates and metal acetylides. This generates fire hazard. Reacts violently with metal hexafluorides. This generates fire and explosion hazard. Reacts on heating with water. This produces flammable/explosive gas (hydrogen – see ICSC 0001).


Conditions to avoid

no data available


Incompatible materials

no data available


Hazardous decomposition products

no data available

SECTION 11: Toxicological information

Acute toxicity

  • Oral: LD50 – mouse – 70 mg/kg bw.
  • Inhalation: no data available
  • Dermal: no data available

Skin corrosion/irritation

no data available

Serious eye damage/irritation

no data available

Respiratory or skin sensitization

no data available

Germ cell mutagenicity

no data available


no data available

Reproductive toxicity

no data available

STOT-single exposure

May cause mechanical irritation to the eyes and respiratory tract.

STOT-repeated exposure

no data available

Aspiration hazard

A nuisance-causing concentration of airborne particles can be reached quickly when dispersed.

SECTION 12: Ecological information



  • Toxicity to fish: no data available
  • Toxicity to daphnia and other aquatic invertebrates: EC50 – Daphnia magna – ca. 35.4 mg/L – 48 h.
  • Toxicity to algae: EC50 – Pseudokirchneriella subcapitata (previous names: Raphidocelis subcapitata, Selenastrum capricornutum) – >= 16.6 – <= 19.6 mg/L - 72 h.
  • Toxicity to microorganisms: no data available


Persistence and degradability

no data available


Bioaccumulative potential

no data available


Mobility in soil

no data available


Other adverse effects

no data available

SECTION 13: Disposal considerations


Disposal methods


The material can be disposed of by removal to
a licensed chemical destruction plant or by controlled incineration
with flue gas scrubbing. Do not contaminate water, foodstuffs,
feed or seed by storage or disposal. Do not discharge to sewer systems.

Contaminated packaging

Containers can be triply rinsed (or equivalent) and
offered for recycling or reconditioning.
Alternatively, the packaging can be punctured to
make it unusable for other purposes and then be disposed of
in a sanitary landfill. Controlled incineration
with flue gas scrubbing is possible for combustible packaging materials.

SECTION 14: Transport information


UN Number

ADR/RID: UN1346 (For reference only, please check.)IMDG: UN1346 (For reference only, please check.)IATA: UN1346 (For reference only, please check.)


UN Proper Shipping Name



Transport hazard class(es)

ADR/RID: 4.1 (For reference only, please check.)IMDG: 4.1 (For reference only, please check.)IATA: 4.1 (For reference only, please check.)


Packing group, if applicable

ADR/RID: III (For reference only, please check.)IMDG: III (For reference only, please check.)IATA: III (For reference only, please check.)


Environmental hazards



Special precautions for user

no data available


Transport in bulk according to IMO instruments

no data available

SECTION 15: Regulatory information


Safety, health and environmental regulations specific for the product in question

Chemical nameCommon names and synonymsCAS numberEC number
Monocrystalline silicon7440-21-3231-130-8
European Inventory of Existing Commercial Chemical Substances (EINECS)Listed.
EC InventoryListed.
United States Toxic Substances Control Act (TSCA) InventoryListed.
China Catalog of Hazardous chemicals 2015Listed.
New Zealand Inventory of Chemicals (NZIoC)Listed.
Philippines Inventory of Chemicals and Chemical Substances
Vietnam National Chemical InventoryListed.
Chinese Chemical Inventory of Existing Chemical Substances (China
Korea Existing Chemicals List (KECL)Listed.

SECTION 16: Other information

Information on revision

Creation DateOct 16, 2020
Revision DateOct 16, 2020

Abbreviations and acronyms

  • CAS: Chemical Abstracts Service
  • ADR: European Agreement concerning the International Carriage of Dangerous Goods by Road
  • RID: Regulation concerning the International Carriage of Dangerous Goods by Rail
  • IMDG: International Maritime Dangerous Goods
  • IATA: International Air Transportation Association
  • TWA: Time Weighted Average
  • STEL: Short term exposure limit
  • LC50: Lethal Concentration 50%
  • LD50: Lethal Dose 50%
  • EC50: Effective Concentration 50%


  • IPCS – The International Chemical Safety Cards (ICSC), website:
  • HSDB – Hazardous Substances Data Bank, website:
  • IARC – International Agency for Research on Cancer, website:
  • eChemPortal – The Global Portal to Information on Chemical Substances by OECD, website:
  • CAMEO Chemicals, website:
  • ChemIDplus, website:
  • ERG – Emergency Response Guidebook by U.S. Department of Transportation, website:
  • Germany GESTIS-database on hazard substance, website:
  • ECHA – European Chemicals Agency, website:

Other Information

Reacts violently with fire extinguishing agents such as water.

Any questions regarding this SDS, Please send your inquiry to [email protected]

Disclaimer: 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. We as supplier shall not be held liable for any
damage resulting from handling or from contact with the above product.

Chemical Formular:Si
PubChem CID:5461123
IUPAC Name:silicon
Canonical SMILES:[Si]
Globally Harmonized System of Classification
GHS Hazard Statements:H228
Hazard Codes:F
Risk Codes:R11
Precautionary Statement Codes:P210-P240-P241-P280-P370 + P378
Flash Point:n/a

Silicon particles
Silicon microparticles
Silicon micropowder
Silicon micro powder

Silicon micron powder
Silicon submicron powder
Silicon sub-micron powder

SiliconSilicon is a chemical element with the symbol Si and atomic number 14.
It is a hard and brittle crystalline solid with a blue-grey metallic lustre; and it is a tetravalent metalloid and semiconductor.
It is a member of group 14 in the periodic table: carbon is above it; and germanium, tin, and lead are below it.

Fiber drums, steel drums, and bulk bags

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