Silanol (HCID 142154)

Overview

Silanol is the simplest silanol, consisting of a single silicon atom covalently bouund to three hydrogens and a hydroxy group.

Names & identifiers

Preferred name: Silanol
IUPAC: hydroxysilane
English name: Polydimethylsiloxane, dihydroxy terminated
Molecular formula: HOSi
Molecular weight: 45.09284

Names & synonyms

HydroxysilaneCHEBI:37173RefChem:56011DTXCID6085288SELLA NATURAL VOLCANIC ASH MUD MASK807-787-7079V3J9O3X14475-38-8DTXSID40162797SilanolSCHEMBL18357SCHEMBL35324

Show more names

SILANOL TERMINATED POLYDIMETHYLSILOXANEHydroxyl Silicone OilHydroxyl silicone fluidSILANOL TERMINATED POLYDIMETHYLSILOXANE,18000CSrf5000SILICON PS 347.5DimethylhydroxysiliconeoilemulsionSilanol terMinated polydiMethylsiloxane cSt 90-120ps195fm0411

SCPYDCQAZCOKTP-UHFFFAOYSA-NQ420482

Database identifiers

CAS: 14475-38-8、70131-67-8、854228-08-3
PubChem CID: 142154
ChEBI: CHEBI:37173
EC Number: 807-787-7

Properties

Computed structural properties

Topological polar surface area: 20.2 Å²
Hydrogen bond donors: 1
Hydrogen bond acceptors: 1
Rotatable bonds: 0
Heavy atoms: 2
Formal charge: 0
Complexity: 2

Physicochemical properties

Melting point: -60 °C · <-60°C
Boiling point: 182 °C · 182 °C
Density: 0.98 g/mL · 0.98 g/mL at 25 °C
refractive index: 20 · n20/D 1.406
Flash point: 155 °F · 155 °F
storage temp.: 2 · 2-8°C
form: Liquid
Specific Gravity: 0.97 · 0.97
Appearance: Colorless to light yellow Liquid
Viscosity: 100 cs · 100cs
Water Solubility: Soluble in carbon tetrachloride, benzene, chloroform, diethyl ether, toluene and other organic solvents. Insoluble in water and ethanol.
Cosmetics Ingredients Functions: MOISTURISINGSKIN CONDITIONING - EMOLLIENTANTIFOAMING
InChI: InChI=1S/HOSi/c1-2/h1H
InChIKey: XQSFXFQDJCDXDT-UHFFFAOYSA-N
SMILES: [Si]O[H]
EPA Substance Registry System: Hydroxy-terminated dimethyl siloxanes and silicones (70131-67-8)
UNSPSC Code: 12352300 · 12352300
NACRES: 23 · NA.23
Symbol(GHS): 7 · GHS07
Signal word: Warning
Hazard statements: 319 · H319
Precautionary statements: 264 · P264-P280-P305+P351+P338-P337+P313P
PPE: Eyeshields, Gloves
Hazard Codes: Xi
Risk Statements: 36 · 36/37/38
Safety Statements: 23 · 23-24/25-36-26
WGK Germany: 1 · 1
RTECS: 3157812 · VW3157812
TSCA: TSCA listed
Storage Class: 10 · 10 - Combustible liquids

Safety & regulation

GHS classification

GHS Classification · 3 items

H413 (100%): May cause long lasting harmful effects to aquatic life [Hazardous to the aquatic environment, long-term hazard]

P273, and P501 (click each P-code to see the statement)

Aggregated GHS information provided per 22 reports by companies from 1 notifications to the ECHA C&L Inventory.

Hazard information

Hazard Classes and CategoriesAquatic Chronic 4 (100%)

Safety data

PPE: Eyeshields, Gloves
wgk: 1
tsca: TSCA listed
rtecs: VW3157812
risk_code: 36/37/38
Signal word: Warning
Symbol(GHS): GHS07
hazard_code: Xi
safety_code: 23-24/25-36-26
Storage Class: 10 - Combustible liquids
Hazard statements: H319
Precautionary statements: P264-P280-P305+P351+P338-P337+P313P

Chemistry & industry

Applications · 2 items

DescriptionPolydimethylsiloxane, dihydroxy terminated is a non-toxic, optically transparent, inert, flammable silicone-based organic polymer. It is widely used in heat-resistant lubricants, flame retardants, medical devices, and cosmetics. Polydimethylsiloxane is hydrophobic, cytocompatible and viscoelastic and can be used for water-repellent coatings in the textile industry.

UsesPolydimethylsiloxane is frequently used in a liquid containing 4-5% silica gel, emulsifiers and preservatives. It is employed in applications like contact lenses, medical devices, elastomers, in shampoos, food (antifoaming agent), caulking, lubricants, kinetic sand , and heat-resistant tiles. PDMS is a common surfactant, component of defoamers and as an herbicidal penetran.