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Humectants

Dimethylsilanediol

Also known as Silanediol, dimethyl-, Silanediol, 1,1-dimethyl-, dihydroxy(dimethyl)silane

CAS 1066-42-8Formula C2H8O2SiMolar mass 92.17 g/molEC 213-915-7
GHS signal word: Warning. Pictograms: Serious health hazard 2 suppliers listed
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Dimethylsilanediol chemical structure, C2H8O2Si, CAS 1066-42-8
2D chemical structure

Key facts

What buyers check first

All properties
CAS number
1066-42-8
Formula
C2H8O2Si
Molar mass
92.17 g/mol
EC number
213-915-7
HS code
293190
Category
Humectants

What is Dimethylsilanediol?

Plain description, key identifiers and synonyms

Dimethylsilanediol is an organosilanediol.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
dihydroxy(dimethyl)silane
CAS number
1066-42-8 CAS number cross-checkedOther or deprecated CAS: 31692-79-2
EC numbers
213-915-7, 608-658-6
Molecular formula
C2H8O2Si
UNII
DNZ4KJE28U
MDL number
MFCD19441445
INCI name
DIMETHICONOL
InChIKey
XCLIHDJZGPCUBT-UHFFFAOYSA-N
InChI
InChI=1S/C2H8O2Si/c1-5(2,3)4/h3-4H,1-2H3
SMILES (canonical and isomeric)
C[Si](C)(O)O

Synonyms

  • Silanediol, dimethyl-
  • Silanediol, 1,1-dimethyl-
  • dihydroxy(dimethyl)silane
  • 1,1-Dimethylsilanediol
  • Simethicone Impurity 10
  • Polydimethylsiloxane, hydroxy terminated, M.W. 4200
  • 1,1-Dimethylsilanediol >90%
  • Hydroxy-terminated poly(dimethylsiloxane)
  • Dimethiconol
  • Dihydroxydimethylsilane
  • C2H8O2Si
  • Dihydroxydimethylsilane, Dimethyldihydroxysilane, Dimethylsilanediol,
  • Dimethylsilanediol #
  • Si(OH)2Me2
  • (CH3)2Si(OH)2
  • Masil SFR 150,000 CG
  • Poly(dimethylsiloxane) hydroxy terminated

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

No measured properties are recorded for this substance yet. Ask suppliers for a technical data sheet.

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
92.17 g/molcalc.
Exact mass
92.0294 Dacalc.
LogP (octanol/water)
-0.33calc.
Topological polar surface area
40.46 Ųcalc.
Hydrogen bond donors
2calc.
Hydrogen bond acceptors
2calc.
Rotatable bonds
0calc.
Heavy atoms
5calc.
Rings
0calc.
Aromatic rings
0calc.
Fraction sp3 carbons
1calc.
Formal charge
0calc.
Stereocentres
0calc.
Lipinski rule of five
Passes (0 violations)calc.

Calculated for screening. Confirm critical figures with the supplier.

Safety and hazards

GHS classification summary, not a safety data sheet

GHS signal word
Warning
GHS08: Serious health hazard
Serious health hazard

Hazard statements

  • H361Suspected of damaging fertility or the unborn child.
Precautionary statements (5)
  • P203Obtain, read and follow all safety instructions before use.
  • P280Wear protective gloves, protective clothing, eye protection and face protection.
  • P318If exposed or concerned, get medical advice.
  • 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

Dimethylsilanediol suppliers

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

All 2 suppliers

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

2 suppliers in 1 country

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Dimethylsilanediol price

Indicative price range per kg from live supplier offers

No published prices right now

Suppliers quote this chemical on request. Send one free request and compare quotes side by side.

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Uses and applications

What the substance is used for, by industry and function

Use classes: Cosmetics.

Cosmetic ingredient, INCI name DIMETHICONOL(antifoaming, skin conditioning - emollient, moisturising)

Functional uses

  • Defoamer
  • Humectant
  • Lubricating agent
  • Softener and conditioner

Cosmetic functions

  • Antifoaming
  • Moisturising
  • Skin conditioning - emollient

Regulatory status

Inventories, regulations and trade controls that list this substance

Health and food

  • EU cosmetic ingredient inventory

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 Dimethylsilanediol is traded under.

HS 2931.90Indicative HS code

Organo-inorganic compounds, other than tetramethyl lead, tetraethyl lead, tributyltin compounds…

World exports in 2024
$3.97B
+5.3% vs 2023, imports $3.93B
2019 to 2024
Top exporters
  1. China28.3%
  2. United States15.6%
  3. Germany15.1%
Top importers
  1. United States14.6%
  2. China13.0%
  3. South Korea8.5%
Reported customs values in USD, not prices.Full trade data

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

Frequently asked questions

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

What is Dimethylsilanediol?

Dimethylsilanediol is an organosilanediol.

What is the CAS number of Dimethylsilanediol?

The CAS registry number of Dimethylsilanediol is 1066-42-8. Other or deprecated CAS numbers: 31692-79-2.

What is the molecular formula and weight of Dimethylsilanediol?

The molecular formula of Dimethylsilanediol is C2H8O2Si and its molar mass is 92.17 g/mol.

What is Dimethylsilanediol used for?

Use classes: Cosmetics.

Is Dimethylsilanediol hazardous?

Dimethylsilanediol carries the GHS signal word "Warning". Main hazards: suspected of damaging fertility or the unborn child. This summary is not an SDS, always read the supplier safety data sheet.

What is the HS code of Dimethylsilanediol?

Dimethylsilanediol is usually classified under HS code 293190 (X. ORGANO-INORGANIC COMPOUNDS, HETEROCYCLIC COMPOUNDS, NUCLEIC ACIDS AND THEIR SALTS…). This is indicative, confirm it with your customs broker before shipping.

Where can I buy Dimethylsilanediol?

CompoundList lists 2 suppliers of Dimethylsilanediol in China. Send one free request to get and compare quotes. Your contact details stay private until you accept a quote.

What is the price of Dimethylsilanediol?

Suppliers quote Dimethylsilanediol 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 Dimethylsilanediol

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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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