Tetramethylammonium hydroxide, 25% w/w aq. soln., Electronic Grade, 99.9999% (metals basis), Thermo Scientific Chemicals

Description

Tetramethylammonium hydroxide is used to produce tetramethyl-ammonium azide. It is used as an anisotropic etchant of silicon, basic solvent in the development of acidic photoresist in photolithography process, as surfactant in the synthesis of ferrofluid and as a polarographic reagent. It finds application in the production of organic silicon, where it is used for computer silicon wafer surface brightener and cleaning agent. It is also involved in the purification of some metallic elements.

This Thermo Scientific Chemicals brand product was originally part of the Alfa Aesar product portfolio. Some documentation and label information may refer to the legacy brand. The original Alfa Aesar product / item code or SKU reference has not changed as a part of the brand transition to Thermo Scientific Chemicals.

Specifications

Chemical Identifiers

• CAS: 75-59-2
• Molecular Formula: C4H13NO
• Molecular Weight (g/mol): 91.154
• MDL Number: MFCD00008280
• InChI Key: WGTYBPLFGIVFAS-UHFFFAOYSA-M
• Synonym: tetramethylammonium hydroxide, tmah, hydroxyde de tetramethylammonium, nmw-w, nmd 3, tetramethyl ammonium hydroxide, unii-5gkp7317q2, ammonium, tetramethyl-, hydroxide, methanaminium, n,n,n-trimethyl-, hydroxide, tetramethylammoniumhydroxide
• PubChem CID: 60966
• IUPAC Name: tetramethylazanium;hydroxide
• SMILES: C[N+](C)(C)C.[OH-]

• Color: Colorless to Yellow
• Density: 1.016 g/mL
• Boiling Point: ∼102°C
• Refractive Index: 1.384
• Linear Formula: (CH₃)₄NOH
• Quantity: 1 L
• UN Number: 1835
• Beilstein: 3558708
• Sensitivity: Air Sensitive
• Merck Index: 14,9224
• Solubility Information: Miscible with water.
• Formula Weight: 91.15
• Percent Purity: 99.9999%
• Grade: Electronic
• Concentration or Composition (by Analyte or Components): 25% w/w aq. soln.
• Physical Form: Liquid
• Assay: (metals basis)
• Chemical Name or Material: Tetramethylammonium Hydroxide

Safety and Handling

Hazard Category	H301-H310-H314-H370-H372
Hazard Statement	GHS H Statement H300-H310-H370-H372-H314 Fatal if swallowed. Fatal in contact with skin. Causes damage to organs. Causes damage to organs through prolonged or repeated exposure. Causes severe skin burns and eye damage.
Precautionary Statement	P260-P264b-P270-P280-P303+P361+P353-P304+P340-P305+P351+P338-P310-P330-P331-P363-P501c
DOTInformation	Transport Hazard Class: 8; Packing Group: II; Proper Shipping Name: TETRAMETHYLAMMONIUM HYDROXIDE SOLUTION
EINECSNumber	200-882-9
RTECSNumber	PA0875000
TSCA	Yes
Recommended Storage	Ambient temperatures; Store under Nitrogen

SDS

RUO – Research Use Only