Tetraethylammonium Hydroxide (TEAH) | High Purity Chemicals | CAS# 77-98-5

SACHEM’s Tetraethylammonium Hydroxide (TEAH, CAS# 77-98-5) is a versatile quaternary ammonium compound. With production facilities in America, Europe, and Asia, SACHEM is capable of delivering this product globally. Different industries use this powerful organic base. These industries include photovoltaic chemicals, advanced ceramics, flat panel display chemicals, selective etching, and transesterification catalysts.

Interacts with the atmosphere, absorbing carbon dioxide. Keep the container tightly sealed and unopened until it is ready for use.

Benefits of SACHEM’s TEAH:

  • Strong organic base strength
  • Miscibility and stability in photoresist solutions
  • Low volatility

Tetraethylammonium Hydroxide, TEAH, CAS# 77-98-5


The electronic materials industry has used TEAH as an alternative to Tetramethylammonium Hydroxide.


Available Products
Tetraethylammonium Hydroxide, 20% Aqueous
TEAH 20% Aq
Tetraethylammonium Hydroxide 20AQ Quote Tetraethylammonium Hydroxide 20AQ sample
Tetraethylammonium Hydroxide, 20% Ultra Pure
Tetraethylammonium Hydroxide 20UP Quote Tetraethylammonium Hydroxide 20UP sample
Tetraethylammonium Hydroxide, 35% Aqueous
TEAH 35% Aq
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Tetraethylammonium Hydroxide, 35% Ultra Pure
Tetraethylammonium Hydroxide 35UP Quote Tetraethylammonium Hydroxide 35UP Sample Tetraethylammonium Hydroxide 35UP


National Center for Biotechnology Information. PubChem Database. Tetraethylammonium hydroxide, CID=6509, https://pubchem.ncbi.nlm.nih.gov/compound/Tetraethylammonium-hydroxide

CAS Number 77-98-5
Tetraethyl ammonium hydroxide
Ammonium tetraethyl-, hydroxide
Ethanaminium, N,N,N-triethyl-, hydroxide
Linear Formula (C2H5)4N(OH)


"Tetraethylammonium Hydroxide (TEAH) | High Purity Chemicals | CAS# 77-98-5"