Tetramethylammonium hydroxide(Electronic Grade)--Nantong Huanyu Chemicals Co., Ltd.

[Alias]: TMAH

[Appearance]: Colorless needle shaped crystals, highly hygroscopic, strongly alkaline, can quickly absorb carbon dioxide in air, decompose into methanol and trimethylamine at 130 ℃.

[Molecular formula]: C₄H₂₃NO₆

[Molecular weight]: 181.23

[Structural formula]:

[CAS] ：10424-65-4

[Quality indicators]

Index name	Index Value
Description	Colorless needle crystal
（C₄H₁₂NOH.5H₂O ） % ≥ Purity % min	98.0
Alkali content（％） min	49.0 – 50.0
Carbonate (as CO3 ) % max	1.0
Chloride (as Cl ) % max	0.01
Metal ion (asNa,K,Mg,Fe,Cu,Al,Zn,Ca,Cr,Pb,Ag,Ni）ppm max	2

[Purpose]: Mainly used as a cleaning agent for chips, wafers, LCD screens, etching agent for the electronic industry, catalyst in the synthesis of organic silicon products, polarographic reagent, polyester polymerization, textile industry, leather, silicone, pesticide and other industries.

[Packaging and Storage]: 250g plastic bottles * 40/box, 20kg/cardboard drum or 25kg/cardboard drum, with double-layer plastic bags for inner packaging, as requested by the customer. Store in a cool and ventilated warehouse. Stay away from sources of fire and heat. Protect from direct sunlight. The packaging should be sealed and stored separately from oxidants, acids, and carbon dioxide, avoiding mixed storage.