Back
HuagongsheHuagongshe Chemistry Print Report · For research reference only
HCID 69925Generated: October 23, 2026

Triphenylsilanol

CFS-311 · LS 6400 · DKSI086 · DKFELEX0283 · riphenylsilanol · TRIPHENYLSILANOL · triphenyl-silano · Silanol,triphenyl-

https://huagongshe.com/en/chemical/69925

Triphenylsilanol molecular structure

Identifiers & Physical Properties

CAS No.791-31-1
Molecular formulaC18H16OSi
Average molar mass276.4 g/mol
Monoisotopic mass276.09704166 g/mol
SMILESO[Si](c1ccccc1)(c1ccccc1)c1ccccc1
InChIKeyNLSXASIDNWDYMI-UHFFFAOYSA-N
PubChem CID69925
ChEMBLCHEMBL378228
ChEBICHEBI:35035
EC No.212-339-3
DTXSIDDTXSID1036545

Chemical & Physical Properties

Topological polar surface area20.2
Hydrogen bond donors1
Hydrogen bond acceptors1
Rotatable bonds3
Heavy atoms20
Formal charge0
Complexity240
Collision Cross Section171.0 Ų [M-H]- [CCS Type: DTBuffer gas: N2Ionization: ESI-Dataset: TOXCASTSource Identifier: DTXSID1036545]
Melting point150-153 °C (lit.)
Boiling point389 °C [760mmHg]
Density1.13
Refractive index1.628
Flash point>200°C
Storage conditionsInert atmosphere,Room Temperature
Physical statePowder
pKa (acidity coefficient)13.39±0.58(Predicted)
Colorwhite
Solubilityreacts
SensitivityAir Sensitive
Hydrolytic Sensitivity4: no reaction with water under neutral conditions
BRN985007
InChIKeyNLSXASIDNWDYMI-UHFFFAOYSA-N
CAS DataBase Reference791-31-1(CAS DataBase Reference)
FDA UNIIAZC8O4TTX4
NIST Chemistry ReferenceSilanol, triphenyl-(791-31-1)
EPA Substance Registry SystemSilanol, triphenyl- (791-31-1)
UNSPSC Code12352103
NACRESNA.22
GHS pictogramGHS07
Signal wordWarning
GHS hazard statementsH315-H319-H335
GHS precautionary statementsP261-P280a-P304+P340-P305+P351+P338-P405-P501a
Hazard symbolsXi
Risk statements (R)36/37/38
Safety statements (S)26-36
Water hazard class (WGK)1
RTECS numberVV4325500
F21
TSCA inventory statusTSCA listed
Customs code29310095

Safety & Regulations

GHS classificationThis chemical does not meet GHS hazard criteria for 36.1% (26 of 72) of reports.WarningH315 (63.9%): Causes skin irritation [Warning Skin corrosion/irritation]H319 (63.9%): Causes serious eye irritation [Warning Serious eye damage/eye irritation]H335 (61.1%): May cause respiratory irritation [Warning Specific target organ toxicity, single exposureRespiratory tract irritation]P261, P264, P264+P265, P271, P280, P302+P352, P304+P340, P305+P351+P338, P319, P321, P332+P317, P337+P317, P362+P364, P403+P233, P405, and P501 (click each P-code to see the statement)Aggregated GHS information provided per 72 reports by companies from 5 notifications to the ECHA C&L Inventory. Each notification may be associated with multiple companies.Reported as not meeting GHS hazard criteria per 26 of 72 reports by companies.There are 4 notifications provided by 46 of 72 reports by companies with hazard statement code(s).Information may vary between notifications depending on impurities, additives, and other factors. The percentage value in parenthesis indicates the notified classification ratio from companies that provide hazard codes. Only hazard codes with percentage values above 10% are shown. For more detailed information, please visit ECHA C&L website.
Regulatory informationChemical: Silanol, triphenyl-Triphenylsilanol: Does not have an individual approval but may be used under an appropriate group standard
Hazard Classes and CategoriesSkin Irrit. 2 (63.9%)Eye Irrit. 2 (63.9%)STOT SE 3 (61.1%)
F21
Water hazard class (WGK)1
TSCA inventory statusTSCA listed
RTECS numberVV4325500
Customs code29310095
Risk statements (R)36/37/38
Signal wordWarning
GHS pictogramGHS07
Hazard symbolsXi
Safety statements (S)26-36
GHS hazard statementsH315-H319-H335
GHS precautionary statementsP261-P280a-P304+P340-P305+P351+P338-P405-P501a

Applications & Uses

Uses

Triphenylsilanol is used as a water surrogate for regioselective Pd catalyzed allylations. A thick on germanium substrates have been produced by the electron bombardment of an evaporated thin film of triphenylsilanol.