Supplier Industrial/Electronic Grade TMAH 25% Tetramethylammonium Hydroxide

Short Description:

Product name: Tetramethylammonium hydroxide

CAS NO: 75-59-2

Appearance: colorless transparent liquid

Assay:25.0%,

Packing: 200kgs/drum

Tetramethylammonium hydroxide (TMAH or TMAOH) is a quaternary ammonium salt with the molecular formula [(CH3)4N]+[OH]-, and is the simplest member of the class of organic quaternary ammonium compounds. One of its industrial uses is for the anisotropic etching of silicon. It is also used as a basic solvent in the development of acidic photoresist in the photolithography process. Since it is a phase transfer catalyst, it is highly effective in stripping photoresist. It is also used as a surfactant in the synthesis of ferrofluid, to prevent agglomeration.

Good Quality & Fast Delivery & Customization Service

Hotline: +86-15255616228(WhatsApp&Wechat)

Email: daisy@shxlchem.com

Send email to us

Product Detail

Product Tags

Description

Tetramethylammonium hydroxide (TMAH or TMAOH) is a quaternary ammonium salt with the molecular formula [(CH₃)₄N]⁺[OH]^-, and is the simplest member of the class of organic quaternary ammonium compounds. One of its industrial uses is for the anisotropic etching of silicon. It is also used as a basic solvent in the development of acidic photoresist in the photolithography process. Since it is a phase transfer catalyst, it is highly effective in stripping photoresist. It is also used as a surfactant in the synthesis of ferrofluid, to prevent agglomeration.

Specification:

Chemical name	Tetramethylammonium hydroxide Solution
Other name	TMAH
CAS #	75-59-2
Purity	25% min
Molecular formula	(CH3)4NOH
Molecular weight	91.15
Chemical Properties	Colorless to light yellow liquid.Easy to absorb carbon dioxide, strong alkaline, strong corrosive.
Application	1. Phase transfer catalysts in organic synthetic chemistry. 2. Anisotropic corrosion solution for electronic industry, catalyst for polymerization of silicone rubber and other silicone products
Packing	1KG, 25KG, 200kg, 1000KG IBC, ISO TANK

Technical Data Sheet/TDS:

Specifications	Item	Unit	MIN	MAX
	Assay	%	24.90	25.10
	Color	Hazen		5
	CO₃^2- (Carbonate)	ppm		100
	Cl^- ( Chloride )	ppm		0.1
	CH₃OH (Methanol)	ppm		40
	Li (Lithium)	ppb		5
	Na (Sodium)	ppb		10
	Mg (Magnesium)	ppb		5
	Al (Aluminium)	ppb		10
	K (Potassium)	ppb		10
	Ca (Calcium)	ppb		10
	Cr (Chromium)	ppb		5
	Mn (Manganese)	ppb		5
	Fe (Iron)	ppb		5
	Ni (Nickel)	ppb		5
	Co (Cobalt)	ppb		5
	Cu (Copper)	ppb		5
	Zn (Zinc)	ppb		5
	Mo (Molybdenum)	ppb		5
	Cd (Cadmium)	ppb		5
	Pb (Lead)	ppb		5
	Ag (Silver)	ppb		5
	Particle >=0.5um	Ea/ml		100

Physical Properties*	Form	Liquid
	Boiling Point,°C	100.0
	Freezing point, °C	<-25.0
	Viscosity@ 25 °C,cst	2.8
	Specific Gravity @ 60 °F	1.022
	Flashpoint (Pensky Martens), °F	>200
	pH	>13

Shipping Information	Containers
	200L clean drum
	Other containers available upon request.
	Shipping Classification
	Proper shipping name: tetramethylammonium hydroxide
	Hazard classification: 8
	Identification number: UN1835, PGII

Safety and Handling	For specific safety and handling information please refer to the
	Material Safety Data Sheet which is available upon request.

Remarks*

Tetramethylammonium Hydroxide(2.380%,20.0%,electronic grade), TMAH (25%, 98%,industrial grade) are also available, please contact us for details.

Application

1) In the aspect of analysis, tetramethylammonium Hydroxide can be used as polarographic reagent.

2) In terms of product purification, it was used as ash free alkali to sediment some metallic element.

3) in electronic industry , especially as positive resister developer , silicon wafer wet etchant and super clean solution for CMP process.

4) in the manufacture of integrated circuits, liquid crystal displays, printed circuit boards, capacitors, sensors, and many other electronic components.