Silicon
- CAS Number
- 7440-21-3
- HSN Code
- 28046900
- Molecular Formula
- Si
- Catalogue Number
- AL3996
- Purity
- ≥ 98.5%
- Molecular Weight
- 28.09 g/mol
Complies with : IP | BP | USP | EP | ACS
ISO 9001
ISO 14001
GMP
COA with every batch
Key Properties
Silicon atom is a metalloid atom, a nonmetal atom and a carbon group element atom.
Also known as Silicon powder, Elemental silicon.
- Catalogue No.
- AL3996
- CAS Number
- 7440-21-3
- Molecular Formula
- Si
- Molecular Weight
- 28.09 g/mol
- HSN Code
- 28046900
- Grade
- 98.5% Extra Pure
- Product Form
- Substance
Melting point: 1410 °C; Boiling point: 2355 °C; Density: 2.33 gcu cm at 25 °C4 °C; Solubility: Soluble in a mixture of nitric and hydrofluoric acids and in alkalis; insoluble in nitric and hydrochloric acid.
- Appearance
- Dark brown powder
- Shelf Life
- -
- Packaging
- Available in: 500 gm plastic bottle, 5 Kg plastic bottle
- Storage
- Separated from incompatible materials. See Chemical Dangers.
1.1 — Product identifier
- Chemical Name
- Silicon
- Catalogue No.
- AL3996
- Product form
- Substance
- CAS Number
- 7440-21-3
- EC Number
- 231-130-8
- Grade
- 98.5% Extra Pure
- EC Index Number
- Not specified
- Chemical Formula
- Si
- HSN Code
- 28046900
- Synonyms
- Silicon powder, Elemental silicon
1.2 — Relevant identified uses of the substance or mixture and uses advised against
- Use of the substance/mixture
- Raw material for semiconductor and solar industries
- Uses advised against
- Not specified
1.3 — Details of the supplier of the safety data sheet
- Company identification
- Address:- 102, B wing, Savgan Heights, RTO Lane,Andheri (W), Mumbai-400 053Maharashtra, India.
1.4 — Emergency Contact Details
- Phone / e-Mail
- Phone : +91 22 26317055 Mobile : +91 9820385757 e-mail : info@alphachemika.co.in
2.1 — Classification of the substance or mixture
- Classification according to Regulation (EC) No 1272/2008
- Flam. Sol. 2
- Classification source
- Thermo Fisher Scientific SDS - Silicon powder AC20156 (rev. 19-Dec-2025, OSHA HCS 2024) - supplier classification, CAS verified
2.2 — Label elements
- Hazard pictograms
- Flammable
- Signal word
- Warning
- Hazard statements
- H228: Flammable solid
- Precautionary statements
- P210, P240, P241, P280, P370+P378
2.3 — Other hazards
- Other hazards
- Flammable dust; avoid ignition sources.
3.1 — Substance
- Name
- Silicon
- CAS No.
- 7440-21-3
4.1 — Description of first aid measures
- First-aid measures after inhalation
- If a person breathes large amounts of this chemical, move the exposed person to fresh air at once.
- First-aid measures after skin contact
- Wash with soap and water. If irritation occurs, seek medical attention.
- First-aid measures after eye contact
- If this chemical contacts the eyes, immediately wash (irrigate) the eyes with large amounts of water, occasionally lifting the lower and upper lids. Get medical attention immediately.
- First-aid measures after ingestion
- If this chemical has been swallowed, get medical attention immediately.
4.2 — Most important symptoms and effects, both acute and delayed
- Symptoms relating to use
- Irritation of the respiratory tract, skin, and eyes.
4.3 — Indication of any immediate medical attention and special treatment needed
- General information
- Treat symptomatically. Show this safety data sheet to the treating physician.
5.1 — Extinguishing media
- Suitable extinguishing media
- Water spray, carbon dioxide, dry chemical powder, foam.
- Unsuitable extinguishing media
- Not specified
5.2 — Special hazards arising from the substance or mixture
- Special procedures
- Reacts violently with fire extinguishing agents such as water.
5.3 — Advice for firefighters
- Protection during firefighting
- Do not enter fire area without proper protective equipment, including respiratory protection.
6.1.1 — For non-emergency personnel
- Emergency procedures
- Avoid dust formation. Use appropriate protective equipment. Ensure adequate ventilation.
6.3 — Methods and material for containment and cleaning up
- Methods for cleaning up
- Sweep spilled substance into covered containers. If appropriate, moisten first to prevent dusting.
6.4 — Reference to other sections
- Reference
- Not specified
7.1 — Precautions for safe handling
- Precautions for safe handling
- Avoid dust formation. Use appropriate personal protective equipment (PPE).
- Hygiene measures
- Wash hands and other exposed areas with mild soap and water before eating, drinking or smoking and when leaving work.
7.2 — Conditions for safe storage, including any incompatibilities
- Storage conditions
- Separated from incompatible materials. See Chemical Dangers.
8.2 — Exposure controls
- Hand protection
- Protective gloves (e.g. nitrile rubber)
- Eye protection
- Chemical safety goggles or safety glasses
- Skin and body protection
- Wear suitable protective clothing
- Respiratory protection
- Use a NIOSH-approved respirator if dust is generated.
9.1 — Information on basic physical and chemical properties
- Physical state
- Solid
- Colour
- Dark gray
- Odour
- Odourless
- Odour threshold
- Not applicable
- pH value
- Not applicable
- Relative evaporation rate (butylacetate=1)
- Not applicable
- Melting point
- 1410 °C
- Freezing point
- Not applicable
- Boiling point
- 2355 °C
- Flash point
- Not applicable
- Auto-ignition temperature
- Not applicable
- Decomposition temperature
- Not applicable
- Flammability (solid, gas)
- Flammable solid
- Vapour pressure
- 1 Pa at 1635 °C; 10 Pa at 1829 °C; 100 Pa at 2066 °C; 1 kPa at 2363 °C; 10 kPa at 2748 °C; 100 kPa at 3264 °C
- Relative vapour density at 20°C
- Not applicable
- Density
- 2.33 gcu cm at 25 °C4 °C
- Solubility
- Soluble in a mixture of nitric and hydrofluoric acids and in alkalis; insoluble in nitric and hydrochloric acid
- Log Pow
- Not applicable
- Viscosity, kinematic
- Not applicable
- Viscosity, dynamic
- Not applicable
- Explosive properties
- Not explosive
- Oxidising properties
- Not oxidizing
- Explosive limits
- Not applicable
10.1 — Reactivity
- Reactivity
- Stable under normal conditions, but may react with strong oxidizers.
10.2 — Chemical stability
- Chemical stability
- Stable under recommended storage conditions.
10.3 — Possibility of hazardous reactions
- Possibility of hazardous reactions
- Reacts violently with oxidants, halogens, metal carbonates and metal acetylides. This generates fire hazard. Reacts violently with metal hexafluorides.
10.4 — Conditions to avoid
- Conditions to avoid
- Avoid contact with incompatible materials and excessive heat.
10.5 — Incompatible materials
- Incompatible materials
- Strong oxidizing agents, strong acids, and bases.
10.6 — Hazardous decomposition products
- Hazardous decomposition products
- Not specified
11.1 — Information on toxicological effects
- Acute toxicity
- LD50 Rat oral 3160 mg/kg; LC50; Rabbit (alveolar macrophages in culture); Concentration: 199 ugmL for 20 hr (95% confidence limits 116-339 mgmL); Conditions: temp 37 °C
- Skin corrosion/irritation
- Not classified (based on available data)
- Serious eye damage/irritation
- Not classified (based on available data)
- Respiratory or skin sensitisation
- Not classified (based on available data)
- Germ cell mutagenicity
- Not classified (based on available data)
- Carcinogenicity
- Not classified (based on available data)
- Specific target organ toxicity (single exposure)
- Not classified (based on available data)
- Specific target organ toxicity (repeated exposure)
- Not classified (based on available data)
12.1 — Toxicity
- Toxicity information
- Not specified
12.2 — Persistence - degradability
- Persistence - degradability
- Not specified
12.3 — Bioaccumulative potential
- Bioaccumulative potential
- Not specified
12.4 — Mobility in soil
- Mobility in soil
- Not specified
12.6 — Other adverse effects
- Environmental precautions
- Not specified
13.1 — Waste treatment methods
- Additional Info
- Dispose of contents/container in accordance with local, regional, national and international regulations.
14.1 — UN number
- UN-No. (ADR)
- UN 1346
- UN-No. (IMDG)
- UN 1346
- UN-No. (IATA)
- UN 1346
- UN-No. (ADN)
- UN 1346
- UN-No. (RID)
- UN 1346
14.2 — UN proper shipping name
- Proper Shipping Name (ADR)
- SILICON POWDER, AMORPHOUS
- Proper Shipping Name (IMDG)
- SILICON POWDER, AMORPHOUS
- Proper Shipping Name (IATA)
- Silicon powder, amorphous
- Proper Shipping Name (ADN)
- SILICON POWDER, AMORPHOUS
- Proper Shipping Name (RID)
- SILICON POWDER, AMORPHOUS
14.3 — Transport hazard class(es)
- Transport hazard class(es)
- 4.1
14.4 — Packing group
- Packing group (ADR)
- III
- Packing group (IMDG)
- III
- Packing group (IATA)
- III
- Packing group (ADN)
- III
- Packing group (RID)
- III
14.5 — Environmental hazards
- Dangerous for the environment
- Not specified
- Marine pollutant
- Not specified
- Other information
- No supplementary information available
15.1 — Safety, health and environmental regulations/legislation specific for the substance or mixture
- 15.1.1 EU-Regulations
- Not specified
Silicon metal powder is primarily used as a raw material in the semiconductor industry for the fabrication of silicon wafers, which are essential for integrated circuits and microelectronics. Additionally, it is utilized in the photovoltaic industry for the production of solar cells, enabling the conversion of sunlight into electricity. Other applications include the manufacture of silicones, alloys, and as a reducing agent in metallurgical processes.
ISO 9001
ISO 14001
GMP
COA with every batch
- Batch Number
- AL-2026-AL01321
- Manufacturing Date
- September-2026
- Expiry Date
- September-2031
- Molecular Weight
- 28.09 g/mol
| Test | Standard | Observed |
|---|---|---|
| Description | Blackish gray colored powder | Blackish gray colored powder |
| Assay (Min) | 98.5% | 98.5% |
The above product complies with EP grade
Technical Data Sheet
| Grade | Assay/Purity | Melting/Boiling Point | Moisture/LOD | Residue on Ignition | Related Substances | Solubility |
|---|---|---|---|---|---|---|
| 98.5% Extra Pure | ≥ 98.5% | m.p. 1410 °C; b.p. 2355 °C | ≤ 0.5% | ≤ 0.5% | None detected | Soluble in a mixture of nitric and hydrofluoric acids and in alkalis; insoluble in nitric and hydrochloric acid |
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“From ordering to shipping, every course of action was smooth. Timely delivery.”
“Alpha Chemika products are of excellent quality. Highly satisfied.”
“From ordering to shipping, every course of action was smooth. Timely delivery.”
“Completely satisfied with the products and services.”
“From ordering to shipping, every course of action was smooth. Timely delivery.”
“Completely satisfied with the products and services.”
“Speedy delivery, professional staff.”
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