Tetramethyl ammonium hydroxide

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Model:	-
Brand:	TMAH
Origin:	-
Category:	Chemicals / Fine Chemicals
Label:	TMAH , TMAH 75-59-2
Price:	-
Min. Order:	-

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Product Description

1. In-stock Fresh New Batches;
2. Quick Order Schedule;
3. Electronic Grade;
4. Positive Resister Developer

Tetramethyl ammonium hydroxide 25% electronic grade

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.

Description	Colorless transparent liquid.
	Structural Formula: (CH3)4NOH
	Formula Weight: 91.15

Specifications	Item	Unit	MIN	MAX
	Assay	%	24.90	25.10
	Color	Hazen		5
	CO32- (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

Usage

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

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.

Chemical Registration Numbers	CAS 75-59-2
	EINECS 200-882-9
	NIOSH/RTECS PA0875000

Remarks*

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

Tetramethyl ammonium hydroxide 25%

Member Information

Wo Hing Water Treatment Co., LTD
Country/Region:	Hu Bei - China
Business Nature:	Manufacturer
Phone:	59701876
Contact:	Nimo.Shi (Director)
Last Online:	05 May, 2014

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