Tetraethylammonium Hydroxide

Tetraethylammonium Hydroxide

CAS No.: 77-98-5
Molecular Formula: C8H21NO
Molecular Weight:147.26
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product description
Youdaoplaceholder0 Pure is colorless transparent crystal, highly hygroscopic, deliquescent to liquid at room temperature; Most industrial products are 20% to 40% aqueous solutions, presenting as colorless to pale yellow transparent liquids. At high concentrations, they are extremely alkaline (pH≈14). It is readily soluble in polar solvents such as water, ethanol and acetone, and undergoes neutralization reaction with acid to form tetraethyl ammonium chloride.


Chemical Properties
PropertyValue

Melting Point

-98C

Boiling Point

110 °C

Ddensity

1.023 g/mL at 25 °C

Refractive iIndex

n20/D1.422

Fp

11 °C

Storage Temp.

2-8°C

Form

Solution

Color

colorless to yellow

PH

>13 (H2O, 20°C)

Water Solubility

SOLUBLE

Sensitive

Air Sensitive

Merck

14,9201

BRN

3912961

Stability:

Stable, but absorbs carbon dioxide from the air

InChIKey

LRGJRHZIDJQFCL-UHFFFAOYSA-M

CAS DataBase Reference

77-98-5(CAS DataBase Reference)

EPA Substance Registry System

Tetraethyl ammonium hydroxide (77-98-5)


Safety Information

PropertyValue

Hazard Codes

C,N,T,F

Risk Statements

34-51-39/23/24/25-23/24/25-11-35

Safety Statements

7-16-26-36/37/39-45-61-36/37

RIDADR

UN 3286 3/PG 2

WGK Germany

3

RTECS

KH3150000

F

9-34

TSCA

Yes

HazardClass

8

PackingGroup

II

HS Code

29239000


Product Usage

Tetraethylammonium Hydroxide (TEAOH for short), with CAS No. 77-98-5 and chemical formula C₈H₂₁NO, is mostly sold as a 20% aqueous solution, appearing as colorless to pale yellow liquid. It is easily soluble in water and ethanol, with strong alkalinity, stable chemical properties but easy to absorb carbon dioxide in the air[3]. Its core applications are in organic synthesis, electronics, analytical chemistry and other fields. It serves as a strong base catalyst to accelerate transesterification, hydrolysis and other reactions, and also as a phase transfer catalyst to improve reaction efficiency. In the electronic field, it is used for semiconductor wafer cleaning and photoresist development to assist chip manufacturing. It can also be used as an ion-pair reagent to assist chromatographic separation, being an indispensable functional raw material in fine chemicals, electronic manufacturing and other fields with small dosage and remarkable effect.

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FAQ

Q1:Does it support customized products?

A1:Yes, it does. Formulations can be adjusted and customized production can be carried out according to customer's industry needs and performance parameters.


Q2:Can samples be provided?

A2:We support free sample delivery and testing services to meet customers' early testing needs.


Q3:Is the product quality stable? 

A3:With full-process quality inspection and control, there are minimal batch differences, and the purity and stability strictly meet the standards.


Q4:What is the shipping cycle?

A4:For regular inventory, we offer quick delivery. For customized orders, we arrange production according to demand and ensure timely delivery.

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