Silicon powder, 99.95%

Name: Silicon powder, 99.95%
Brand: Vaqora Chemicals
SKU: VQ-016203

About Silicon powder, 99.95%

Silicon powder is a metal powder carrying the CAS registry number 7440-21-3, specified at 99.95% purity. With the molecular formula Si, it has a molar mass of 28.09 g/mol. Its systematic (IUPAC) name is silicon. Alternative names: Silicon high purity.

It is supplied as a grey to dark grey powder. Reported physical data include a melting point of 1410 °C and a boiling point of 2355 °C. Store in a tightly closed container in a cool, dry and well-ventilated place. It carries the GHS signal word “Danger” with 2 hazard statements. Review the Safety Data Sheet before use.

Key uses span powder metallurgy, additive manufacturing, chemical synthesis and organic synthesis. Typical end-use sectors are academic and industrial research and metallurgy and mining.

We offer Silicon powder in 10 g, 50 g, 1 kg and 4 x 25 kg packs with a batch-specific COA, and ship to customers worldwide.

Typical applications

Powder metallurgy
Additive manufacturing
Chemical synthesis
Organic synthesis

Industries

Specifications & identifiers

Chemical identifiers
Product name	Silicon powder, 99.95%
Catalogue No.	VQ-016203
CAS Number	7440-21-3
IUPAC name	silicon
Molecular formula	Si
Molecular weight	28.09 g/mol
Exact mass	27.9769
Purity / assay	99.95%
HSN code	28046900
InChIKey	XUIMIQQOPSSXEZ-UHFFFAOYSA-N
SMILES	[Si]
PubChem CID	5461123

Physical properties
Physical form	Powder
Appearance	Grey to dark grey powder
Melting point	1410 °C
Boiling point	2355 °C
Density	2.33 g/mL at 25 °C
H-bond donors / acceptors	0 / 0
TPSA	0 Å²
UN number	UN 1346

Safety & hazard information (GHS)

Flammable

Signal word: Danger

Hazard statements

H228Flammable solid
H320Causes eye irritation

Precautionary statements: P210, P240, P241, P264 + P265, P280, P305 + P351 + P338, P337 + P317, P370 + P378

Classification is indicative (aggregated GHS notifications) and may vary by grade and concentration. Always refer to the SDS supplied with your lot.

Documents

Safety Data Sheet (SDS)16-section GHS · on request Certificate of AnalysisTypical / batch COA · on request Specification sheetTDS / MOA · on request

Other grades of CAS 7440-21-3

Silicon granules 3-6 mm 99.99%

CAS: 7440-21-3
Formula: Si
MW: 28.09 g/mol

VQ-016875

Silicon nanopowder, APS 130 nm, 99.5%

CAS: 7440-21-3
Formula: Si
MW: 28.09 g/mol

VQ-017373

Silicon Nanopowder, APS 20-30 nm, 98%+

CAS: 7440-21-3
Formula: Si
MW: 28.09 g/mol

VQ-017374

Silicon Nanopowder, APS 30-50 nm, 98%

CAS: 7440-21-3
Formula: Si
MW: 28.09 g/mol

VQ-017375

Silicon Nanopowder, APS 50-70 nm, 98%

CAS: 7440-21-3
Formula: Si
MW: 28.09 g/mol

VQ-017376

Silicon optical (mono crystalline) windows, 170 mm dia, 25 mm thick, 99.999%

CAS: 7440-21-3
Formula: Si
MW: 28.09 g/mol

VQ-018093

Silicon optical (mono crystalline) windows, 25 mm dia, 3 mm thick, 99.999%

CAS: 7440-21-3
Formula: Si
MW: 28.09 g/mol

VQ-018094

Silicon optical (mono crystalline) windows, 30 mm dia, 10 mm thick, 99.999%

CAS: 7440-21-3
Formula: Si
MW: 28.09 g/mol

VQ-018095

All 21 products with CAS 7440-21-3 →

Frequently asked questions

What is the CAS number of Silicon powder, 99.95%?

The CAS Registry Number of Silicon powder, 99.95% is 7440-21-3. It is also known as Silicon high purity.

What is the molecular formula and molecular weight of Silicon powder, 99.95%?

Silicon powder, 99.95% has the molecular formula Si and a molecular weight of 28.09 g/mol. Its IUPAC name is silicon.

Which grade and pack sizes of Silicon powder, 99.95% can I order?

We supply Silicon powder, 99.95% in (99.95%) grade, in 10 g, 50 g, 1 kg, 4 x 25 kg packs. Larger bulk quantities and custom packing are quoted on request.

Do you provide a COA and SDS with Silicon powder, 99.95%?

Yes. Every lot of Silicon powder, 99.95% is shipped with a batch-specific Certificate of Analysis, and a 16-section GHS Safety Data Sheet is provided with the quotation and the shipment.

Can Silicon powder, 99.95% be shipped internationally?

Yes. Silicon powder, 99.95% is classified as hazardous (UN 1346), so it is packed in UN-approved packaging and shipped as dangerous goods under IATA/IMDG rules. We export worldwide on EXW, FOB, CIF and DAP terms.