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Silicates, borates and other salts

Silane

Also known as Silicane, Monosilane, Silicon tetrahydride

CAS 7803-62-5Formula H4SiMolar mass 32.12 g/molEC 232-263-4
GHS signal word: Danger. Pictograms: Flammable, Gas under pressure 64 suppliers listed
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Silane chemical structure, H4Si, CAS 7803-62-5
2D chemical structure

Key facts

What buyers check first

All properties
Appearance
Colorless gas
Melting point
-185 °C
Boiling point
-112 °C
Density
0.68 at -185 °C (liquid)
Flash point
NA (Gas)
HS code
285000
Category
Silicates, borates and other salts
UN number
UN 2203
Illustrative photo, a gas cylinder on a trolley on a laboratory bench
Typical packagingIllustrative packaging image, not the actual product

What is Silane?

Plain description, key identifiers and synonyms

Silane is the simplest silane, consisting of a single silicon atom carrying four hydrogens. It is a member of silanes and a mononuclear parent hydride.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
silane
CAS number
7803-62-5 CAS number cross-checked
EC number
232-263-4
Molecular formula
H4Si
UNII
5J076063R1
InChIKey
BLRPTPMANUNPDV-UHFFFAOYSA-N
InChI
InChI=1S/H4Si/h1H4
SMILES (canonical and isomeric)
[SiH4]

Synonyms

  • Silicane
  • Monosilane
  • Silicon tetrahydride
  • Flots 100SCO
  • Silicon hydride
  • SiH4
  • Silan
  • tetrahydridosilicon
  • H4Si
  • Silicon hydride (SiH4)
  • [SiH4]
  • UN 2203

Physical and chemical properties

Measured values and descriptors computed from the structure

Physical and chemical properties

Measured values, check the supplier specification for your grade

Appearance
Colorless gasexp.
Odour
Repulsive odorexp.
Melting point
-185 °Cexp.
Boiling point
-112 °Cexp.
Density
0.68 at -185 °C (liquid)exp.
Flash point
NA (Gas)exp.
Autoignition temperature
Pyrophoricexp.
Solubility
Slowly decomp in water, practically insol in alc, ether, benzene, chloroform, silicochloroform and silicon tetrachloride, decomp in potassium hydoxide solns.exp.
Vapour pressure
Greater than 1 atmexp.

Values vary by grade. Ask suppliers for the COA or TDS of the batch you buy.

Computed descriptors

Calculated from the structure, useful for screening and formulation

Molecular weight
32.12 g/molcalc.
Exact mass
32.0082 Dacalc.
LogP (octanol/water)
-1.45calc.
Topological polar surface area
0 Ųcalc.
Hydrogen bond donors
0calc.
Hydrogen bond acceptors
0calc.
Rotatable bonds
0calc.
Heavy atoms
1calc.
Rings
0calc.
Aromatic rings
0calc.
Fraction sp3 carbons
0calc.
Formal charge
0calc.
Stereocentres
0calc.

Calculated for screening. Confirm critical figures with the supplier.

Safety and hazards

GHS classification summary, not a safety data sheet

GHS signal word
Danger
GHS02: Flammable
Flammable
GHS04: Gas under pressure
Gas under pressure
413NFPA 704 rating

Hazard statements

  • H220Extremely flammable gas.
  • H280Contains gas under pressure, may explode if heated.
Precautionary statements (8)
  • P203Obtain, read and follow all safety instructions before use.
  • P210Keep away from heat, hot surfaces, sparks, open flames and other ignition sources. No smoking.
  • P222Do not allow contact with air.
  • P280Wear protective gloves, protective clothing, eye protection and face protection.
  • P377Leaking gas fire: do not extinguish, unless leak can be stopped safely.
  • P381In case of leakage, eliminate all ignition sources.
  • P403Store in a well-ventilated place.
  • P410 + P403Protect from sunlight. Store in a well-ventilated place.
UN number
UN 2203
Transport hazard class
2.1

GHS classification summary, not a safety data sheet (SDS). Classifications can differ by supplier, grade and concentration. Always check the supplier's SDS.

Full safety data and first aid

Silane suppliers

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All 64 suppliers
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Where suppliers are based

64 suppliers in 18 countries

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Silane price

Indicative price range per kg from live supplier offers

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Uses and applications

What the substance is used for, by industry and function

Source of hyperpure silicon for semiconductors.

Doping agent for solid-state devices, production of amorphous silicon.

Silane is used largely as a raw material to form other silicon-containing compounds, but it also serves as a source of silicon for deposition of epitaxial layers.

Industrial uses: Semiconductor and photovoltaic agent.

Consumer uses: Semiconductor and photovoltaic agent.

Functional uses

  • Adhesion/cohesion promoter
  • Chemical reaction regulator
  • Defoamer
  • Hardener
  • Wetting agent (non-aqueous)

How it is made

Prepared from aluminum silicide and hydrochloric acid or by electrolysis of an aqueous solution of sodium, ammonium, manganese, or ferrous chloride using an aluminum-silicon alloy as the positive pole, ... from magnesium silicide and HCl, ... from zinc silicide and acid, ... from lithium silicide and acid, ... from magnesium silicide and ammonium bromide or chloride in liquid ammonia, ... from lithium aluminum hydride in ether and silicon tetrachloride, ... from silica gel, aluminum oxide and hydrogen, ...

Read more

from silicon tetrachloride and sodium aluminum hydride.

Silane is produced by combining an ether solution of silicon tetrachloride with an ether solution of lithium aluminum hydride.

At pressures of > MPa (400 atm), in the presence of aluminum & aluminum halides, silica can be converted to silane in high yields by reaction with hydrogen.

Regulatory status

Inventories, regulations and trade controls that list this substance

United States

  • TSCA inventory (USA)
    Status: Active in US commerce

HS code and trade data

Customs classification and reported world trade statistics

Global trade

World import and export statistics for the HS code Silane is traded under.

HS 2850.00Indicative HS code

Hydrides, nitrides, azides, silicides and borides, whether or not chemically defined, other than compounds…

World exports in 2024
$648M
−0.5% vs 2023, imports $610M
2019 to 2024
Top exporters
  1. United States33.3%
  2. China24.9%
  3. Japan10.9%
Top importers
  1. South Korea17.6%
  2. China15.8%
  3. India * partner reported12.1%

* Partner reported figures, a lower bound.

Reported customs values in USD, not prices.Full trade data

The HS code shown for Silane is indicative (it was assigned by structure rules). Confirm the classification with your customs broker before shipping.

Frequently asked questions

Quick answers about Silane, based on the data on this page

What is Silane?

Silane is the simplest silane, consisting of a single silicon atom carrying four hydrogens. It is a member of silanes and a mononuclear parent hydride.

What is the CAS number of Silane?

The CAS registry number of Silane is 7803-62-5.

What is the molecular formula and weight of Silane?

The molecular formula of Silane is H4Si and its molar mass is 32.12 g/mol.

What is Silane used for?

Source of hyperpure silicon for semiconductors. Doping agent for solid-state devices, production of amorphous silicon. Silane is used largely as a raw material to form other silicon-containing compounds, but it also serves as a source of silicon for deposition of epitaxial layers.

Is Silane hazardous?

Silane carries the GHS signal word "Danger". Main hazards: extremely flammable gas, contains gas under pressure, may explode if heated. This summary is not an SDS, always read the supplier safety data sheet.

What is the HS code of Silane?

Silane is usually classified under HS code 285000 (Hydrides, nitrides, azides, silicides and borides, whether or not chemically defined…). This is indicative, confirm it with your customs broker before shipping.

Where can I buy Silane?

CompoundList lists 64 suppliers of Silane in China, United States, Germany, India and 14 more. Send one free request to get and compare quotes. Your contact details stay private until you accept a quote.

Where can I buy Silane in India?

4 suppliers in India list Silane on CompoundList. Filter the suppliers list by country and send a request to compare prices, grades and delivery times.

What is the price of Silane?

Suppliers quote Silane on request because prices depend on grade, purity, quantity and destination. A free request on CompoundList gets you several quotes to compare.

Guides for buyers

Practical guides that help when you source, ship or handle Silane

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Data last updated 7 Oct 2026. Details may have changed, please confirm them with the supplier. Report an error on this page
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