13170-23-5

Basic information

• Product Name: DI-T-BUTOXYDIACETOXYSILANE
• Synonyms: Di-tert-butoxysilyl diacetate, Diacetyl di-tert-butyl orthosilicate;(Orthosilicic acid di-tert-butyl)diacetic acid dianhydride;Di-t-butoxydiacetoxysilane, min. 97%;Di-tert-butoxydiacetoxsilane;DI-t-BUTOXYDIACETOXYSILANE, tech-96;Diacetyl di-tert-butyl orthosilicate;Di-tert-butoxysilyl diacetate;aceticacid,dianhydridewithsilicicacid(h4sio4)bis(1,1-dimethylethyl)este
• CAS NO: 13170-23-5
• Molecular Formula: C₁₂H₂₄O₆Si
• Molecular Weight: 292.4
• EINECS: 236-112-3
• Product Categories: Crosslinkers;Crosslinking Agents;Organics;Silicone series;Acetoxy Silanes
• Mol File: 13170-23-5.mol
• Article Data: 1

Chemical Properties

• Melting Point: -4°C
• Boiling Point: 102°C 5mm
• Flash Point: 95°C
• Appearance: Colorless or yellowish transparent liquid
• Density: 1.02
• Vapor Pressure: 0.00469mmHg at 25°C
• Refractive Index: 1.4040 [25°C]
• Water Solubility: 852.1-840000mg/L at 20-25℃
• CAS DataBase Reference: DI-T-BUTOXYDIACETOXYSILANE(CAS DataBase Reference)
• NIST Chemistry Reference: DI-T-BUTOXYDIACETOXYSILANE(13170-23-5)
• EPA Substance Registry System: DI-T-BUTOXYDIACETOXYSILANE(13170-23-5)

Safety Data

• Hazard Codes: C
• Statements: 34-36/37/38
• Safety Statements: 26-36/37/39-45-28
• RIDADR: 1760
• TSCA: Yes
• HazardClass: 8
• PackingGroup: II
• Hazardous Substances Data: 13170-23-5(Hazardous Substances Data)

Usage

Uses

Di-t-butoxydiacetoxy silane (DBAC) is used as a raw material for acetoxy crosslinking RTV-1 sealants.

Chemical Properties

Colorless or yellowish transparent liquid

Flammability and Explosibility

Notclassified

InChI:InChI=1/C12H24O6Si/c1-9(13)15-19(16-10(2)14,17-11(3,4)5)18-12(6,7)8/h1-8H3

Synthetic route

di-t-butoxydichlorosilane (18395-80-7) → di-t-butoxydiacetoxysilane (13170-23-5)

Conditions	Yield
With pyridine; acetic acid	76%
With pyridine; sodium acetate	76%
With NaCH3COO; pyridine	76%
With CH3COOH; pyridine	76%

di-t-butoxydichlorosilane (18395-80-7) + acetic acid (64-19-7) → di-t-butoxydiacetoxysilane (13170-23-5)

Conditions	Yield
With pyridine

tert-butyl alcohol (75-65-0) + tetraacetoxysilane (562-90-3) → di-t-butoxydiacetoxysilane (13170-23-5)

ethanol (64-17-5) + di-t-butoxydiacetoxysilane (13170-23-5) → C12H26O5Si

Conditions	Yield
In tetrahydrofuran at 20℃; for 48h; Schlenk technique; Glovebox; Inert atmosphere;	95%

Iodoethanol (624-76-0) + di-t-butoxydiacetoxysilane (13170-23-5) → C12H25IO5Si

Conditions	Yield
In tetrahydrofuran at 20℃; for 72h; Schlenk technique; Glovebox; Inert atmosphere;	93%

di-t-butoxydichlorosilane (18395-80-7) → di-t-butoxydiacetoxysilane (13170-23-5)

Conditions	Yield
With pyridine; acetic acid	76%
With pyridine; sodium acetate	76%
With NaCH3COO; pyridine	76%
With CH3COOH; pyridine	76%

di-t-butoxydichlorosilane (18395-80-7) + acetic acid (64-19-7) → di-t-butoxydiacetoxysilane (13170-23-5)

Conditions	Yield
With pyridine

tert-butyl alcohol (75-65-0) + tetraacetoxysilane (562-90-3) → di-t-butoxydiacetoxysilane (13170-23-5)

ethanol (64-17-5) + di-t-butoxydiacetoxysilane (13170-23-5) → C12H26O5Si

Conditions	Yield
In tetrahydrofuran at 20℃; for 48h; Schlenk technique; Glovebox; Inert atmosphere;	95%

Iodoethanol (624-76-0) + di-t-butoxydiacetoxysilane (13170-23-5) → C12H25IO5Si

Conditions	Yield
In tetrahydrofuran at 20℃; for 72h; Schlenk technique; Glovebox; Inert atmosphere;	93%

di-t-butoxydiacetoxysilane (13170-23-5) + isopropyl alcohol (67-63-0) → C13H28O5Si

Conditions	Yield
In tetrahydrofuran at 20℃; for 48h; Schlenk technique; Glovebox; Inert atmosphere;	92%

di-t-butoxydiacetoxysilane (13170-23-5) + (R)-(+)-1-iodobutan-2-ol → C14H29IO5Si

Conditions	Yield
In tetrahydrofuran at 20℃; for 72h; Schlenk technique; Glovebox; Inert atmosphere;	91%

methanol (67-56-1) + di-t-butoxydiacetoxysilane (13170-23-5) → C11H24O5Si

Conditions	Yield
In tetrahydrofuran at 20℃; for 16h; Schlenk technique; Glovebox; Inert atmosphere;	91%

(rac)-1-iodo-2-butanol (124780-92-3) + di-t-butoxydiacetoxysilane (13170-23-5) → C14H29IO5Si

Conditions	Yield
In tetrahydrofuran at 20℃; for 72h; Schlenk technique; Glovebox; Inert atmosphere;	90%

di-t-butoxydiacetoxysilane (13170-23-5) → silica gel (112926-00-8, 7631-86-9)

Conditions	Yield
Irradiation (UV/VIS); film formation by pulsed laser deposition at 248 nm on quartz substrate;

di-t-butoxydiacetoxysilane (13170-23-5) → di-t-butoxymethoxysilanol (171365-52-9)

Conditions	Yield
Multi-step reaction with 2 steps 1: tetrahydrofuran / 16 h / 20 °C / Schlenk technique; Glovebox; Inert atmosphere 2: ammonium hydroxide / water / 1 h / 20 °C View Scheme

di-t-butoxydiacetoxysilane (13170-23-5) → C10H24O4Si

Conditions	Yield
Multi-step reaction with 2 steps 1: tetrahydrofuran / 48 h / 20 °C / Schlenk technique; Glovebox; Inert atmosphere 2: ammonium hydroxide / water / 2 h / 20 °C View Scheme

di-t-butoxydiacetoxysilane (13170-23-5) → C10H23IO4Si

Conditions	Yield
Multi-step reaction with 2 steps 1: tetrahydrofuran / 72 h / 20 °C / Schlenk technique; Glovebox; Inert atmosphere 2: ammonium hydroxide / water / 4 h / 20 °C View Scheme

di-t-butoxydiacetoxysilane (13170-23-5) → bis(tert-butoxy)(iso-propoxy)silanol (889448-03-7)

Conditions	Yield
Multi-step reaction with 2 steps 1: tetrahydrofuran / 48 h / 20 °C / Schlenk technique; Glovebox; Inert atmosphere 2: ammonium hydroxide / water / 6 h / 20 °C View Scheme

di-t-butoxydiacetoxysilane (13170-23-5) → C12H27IO4Si

Conditions	Yield
Multi-step reaction with 2 steps 1: tetrahydrofuran / 72 h / 20 °C / Schlenk technique; Glovebox; Inert atmosphere 2: ammonium hydroxide / water / 4 h / 20 °C View Scheme

di-t-butoxydiacetoxysilane (13170-23-5) → C12H27IO4Si

Conditions	Yield
Multi-step reaction with 2 steps 1: tetrahydrofuran / 72 h / 20 °C / Schlenk technique; Glovebox; Inert atmosphere 2: ammonium hydroxide / water / 4 h / 20 °C View Scheme

di-t-butoxydiacetoxysilane (13170-23-5) → C16H35N2O4Si(1+)*I(1-)

Conditions	Yield
Multi-step reaction with 3 steps 1: tetrahydrofuran / 72 h / 20 °C / Schlenk technique; Glovebox; Inert atmosphere 2: ammonium hydroxide / water / 4 h / 20 °C 3: toluene / 3 h / 100 °C View Scheme

di-t-butoxydiacetoxysilane (13170-23-5) → C18H39N2O4Si(1+)*I(1-)

Conditions	Yield
Multi-step reaction with 3 steps 1: tetrahydrofuran / 72 h / 20 °C / Schlenk technique; Glovebox; Inert atmosphere 2: ammonium hydroxide / water / 4 h / 20 °C 3: toluene / 24 h / 100 °C View Scheme

di-t-butoxydiacetoxysilane (13170-23-5) → C18H39N2O4Si(1+)*I(1-)

Conditions	Yield
Multi-step reaction with 3 steps 1: tetrahydrofuran / 72 h / 20 °C / Schlenk technique; Glovebox; Inert atmosphere 2: ammonium hydroxide / water / 4 h / 20 °C 3: toluene / 24 h / 100 °C View Scheme

Upstream product

• 18395-80-7 di-t-butoxydichlorosilane 
• 75-65-0 tert-butyl alcohol 
• 562-90-3 tetraacetoxysilane 
• 64-19-7 acetic acid 

Downstream Products

• 112926-00-8 silica gel 

Relevant articles and documents

Preparation of acyloxyalkoxysilanes

A process for preparing a silane of the formula I where R1 is --O--Y, n is an integer from 1 to 3, R2 is STR1 m is an integer from 1 to 3 and n+m=4, and Y and Z are each, independently of one another, unsubstituted or mono- or polyhalo-substituted C1 --C20 -alkyl, C2 --C20 -alkenyl, C2 --C20 -alkynyl and --(CH2)p --A, where p is an integer from 0 to 6 and A, which is unsubstituted or substituted by one or more C1 -C6 -alkyls, is a 3- to 20-membered hydrocarbon ring entails reacting a halosilicon compound of the formula II where X is fluorine, chlorine, bromine and iodine, with compounds of the formula III and IV, or with an anhydride of the formula V and the compound of the formula IV STR2 where R1 and R2, and Z have the above meanings, M is a metal of main group one and two.