Silicon powder, <40 μm, 99.9%

Name: Silicon powder, <40 μm, 99.9%
Brand: Vaqora Chemicals
SKU: VQ-016204

About Silicon powder, <40 μm, 99.9%

Silicon powder, below 40 μm (CAS 7440-21-3) is a metal powder offered by Vaqora Chemicals at a purity of 99.9%. Formula Si, molecular weight 28.09 g/mol. Systematically, it is named silicon.

The material typically appears as a grey to dark grey powder. Literature values give a boiling point of 2355 °C and a density of 2.33 g/mL at 25 °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, below 40 μm in 10 g, 100 g, 500 g and 5 x 1 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, <40 μm, 99.9%
Catalogue No.	VQ-016204
CAS Number	7440-21-3
IUPAC name	silicon
Molecular formula	Si
Molecular weight	28.09 g/mol
Exact mass	27.9769
Purity / assay	99.9%
HSN code	28046900
InChIKey	XUIMIQQOPSSXEZ-UHFFFAOYSA-N
SMILES	[Si]
PubChem CID	5461123

Physical properties
Physical form	Powder
Appearance	Grey to dark grey powder
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

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

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Silicon nanopowder, APS 130 nm, 99.5%

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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, <40 μm, 99.9%?

The CAS Registry Number of Silicon powder, <40 μm, 99.9% is 7440-21-3.

What is the molecular formula and molecular weight of Silicon powder, <40 μm, 99.9%?

Silicon powder, <40 μm, 99.9% 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, <40 μm, 99.9% can I order?

We supply Silicon powder, <40 μm, 99.9% in (99.9%) grade, in 10 g, 100 g, 500 g, 5 x 1 kg packs. Larger bulk quantities and custom packing are quoted on request.

Do you provide a COA and SDS with Silicon powder, <40 μm, 99.9%?

Yes. Every lot of Silicon powder, <40 μm, 99.9% 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, <40 μm, 99.9% be shipped internationally?

Yes. Silicon powder, <40 μm, 99.9% 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.