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Chlorides and other halides

Hexachlorodisilane

Also known as Disilane, hexachloro-, 1,1,1,2,2,2-Hexachlorodisilane, trichloro(trichlorosilyl)silane

CAS 13465-77-5Formula Cl6Si2Molar mass 268.89 g/molEC 236-704-1
GHS signal word: Danger. Pictograms: Flammable, Corrosive 12 suppliers listed
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Hexachlorodisilane chemical structure, Cl6Si2, CAS 13465-77-5
2D chemical structure

Key facts

What buyers check first

All properties
CAS number
13465-77-5
Formula
Cl6Si2
Molar mass
268.89 g/mol
Physical form
Liquid
HS code
281219
Category
Chlorides and other halides
Illustrative photo, 200 litre blue HDPE drums of liquid in a warehouse
Typical packagingIllustrative packaging image, not the actual product

What is Hexachlorodisilane?

Plain description, key identifiers and synonyms

Hexachlorodisilane is a chemical substance with the molecular formula Cl6Si2 and a molar mass of 268.89 g/mol. Its CAS registry number is 13465-77-5. The IUPAC name is trichloro(trichlorosilyl)silane.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
trichloro(trichlorosilyl)silane
CAS number
13465-77-5 CAS number cross-checked
EC number
236-704-1
Molecular formula
Cl6Si2
UNII
9Z754456JM
MDL number
MFCD00011599
InChIKey
LXEXBJXDGVGRAR-UHFFFAOYSA-N
InChI
InChI=1S/Cl6Si2/c1-7(2,3)8(4,5)6
SMILES (canonical and isomeric)
[Si]([Si](Cl)(Cl)Cl)(Cl)(Cl)Cl

Synonyms

  • Disilane, hexachloro-
  • 1,1,1,2,2,2-Hexachlorodisilane
  • trichloro(trichlorosilyl)silane
  • Si2Cl6
  • Disilane, 1,1,1,2,2,2-hexachloro-
  • Cl6Si2
  • hexachloro-disilane
  • Hexachlorodisilane, 96%
  • 1,1,1,2,2,2-Hexachlorodisilane #
  • 1,1,1,2,2,2-Hexachlorodisilane, Disilicon hexachloride, HCDS

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

Physical form
Liquidexp.

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
268.89 g/molcalc.
Exact mass
265.767 Dacalc.
LogP (octanol/water)
3.38calc.
Topological polar surface area
0 Ųcalc.
Hydrogen bond donors
0calc.
Hydrogen bond acceptors
0calc.
Rotatable bonds
1calc.
Heavy atoms
8calc.
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
GHS05: Corrosive
Corrosive

Hazard statements

  • H225Highly flammable liquid and vapour.
  • H314Causes severe skin burns and eye damage.
Precautionary statements (21)
  • P210Keep away from heat, hot surfaces, sparks, open flames and other ignition sources. No smoking.
  • P233Keep container tightly closed.
  • P240Ground and bond container and receiving equipment.
  • P241Use explosion-proof electrical, ventilating and lighting equipment.
  • P242Use non-sparking tools.
  • P243Take action to prevent static discharges.
  • P260Do not breathe dust, fume, gas, mist, vapours or spray.
  • P264Wash skin thoroughly after handling.
  • P280Wear protective gloves, protective clothing, eye protection and face protection.
  • P301 + P330 + P331If swallowed: Rinse mouth. Do not induce vomiting.
  • P302 + P361 + P354If on skin: Take off immediately all contaminated clothing. Immediately rinse with water for several minutes.
  • P303 + P361 + P353If on skin (or hair): Take off immediately all contaminated clothing. Rinse skin with water or shower.
  • P304 + P340If inhaled: Remove person to fresh air and keep comfortable for breathing.
  • P305 + P354 + P338If in eyes: Immediately rinse with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.
  • P316Get emergency medical help immediately.
  • P321Specific treatment (see supplemental first aid instructions on the label).
  • P363Wash contaminated clothing before reuse.
  • P370 + P378In case of fire: Use appropriate media to extinguish.
  • P403 + P235Store in a well-ventilated place. Keep cool.
  • P405Store locked up.
  • P501Dispose of contents and container in accordance with local regulations.

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

Hexachlorodisilane suppliers

Sponsored listings first, then the documented ranking: membership, verification, replies, completeness, freshness and ratings

All 12 suppliers
12 of 12 offers

Suppliers marked Unclaimed profile have not claimed their profile yet. They are not verified by CompoundList, their offers are price on request and details may have changed, so please confirm them with the supplier. Company representatives can claim a profile with a business email on the company's own website domain. Our team verifies each claim and sends the result by email.

Where suppliers are based

12 suppliers in 5 countries

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Hexachlorodisilane price

Indicative price range per kg from live supplier offers

No published prices right now

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Uses and applications

What the substance is used for, by industry and function

Industrial uses: Other, Intermediate.

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 Hexachlorodisilane is traded under.

HS 2812.19Indicative HS code

Chlorides and chloride oxides, other

World exports in 2024
$159M
+15.9% vs 2023, imports $156M
2019 to 2024
Top exporters
  1. South Korea32.7%
  2. Japan21.7%
  3. Germany16.4%
Top importers
  1. China27.8%
  2. Singapore21.4%
  3. South Korea19.0%
Reported customs values in USD, not prices.Full trade data

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

Frequently asked questions

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

What is Hexachlorodisilane?

Hexachlorodisilane is a chemical substance with the molecular formula Cl6Si2 and a molar mass of 268.89 g/mol. Its CAS registry number is 13465-77-5. The IUPAC name is trichloro(trichlorosilyl)silane.

What is the CAS number of Hexachlorodisilane?

The CAS registry number of Hexachlorodisilane is 13465-77-5.

What is the molecular formula and weight of Hexachlorodisilane?

The molecular formula of Hexachlorodisilane is Cl6Si2 and its molar mass is 268.89 g/mol.

What is Hexachlorodisilane used for?

Industrial uses: Other, Intermediate.

Is Hexachlorodisilane hazardous?

Hexachlorodisilane carries the GHS signal word "Danger". Main hazards: highly flammable liquid and vapour, causes severe skin burns and eye damage. This summary is not an SDS, always read the supplier safety data sheet.

What is the HS code of Hexachlorodisilane?

Hexachlorodisilane is usually classified under HS code 281219 (Chlorides and chloride oxides, other). This is indicative, confirm it with your customs broker before shipping.

Where can I buy Hexachlorodisilane?

CompoundList lists 12 suppliers of Hexachlorodisilane in China, United States, South Korea, Indonesia and 1 more. Send one free request to get and compare quotes. Your contact details stay private until you accept a quote.

What is the price of Hexachlorodisilane?

Suppliers quote Hexachlorodisilane 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 Hexachlorodisilane

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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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