T7505

Tetramethylammonium hydroxide pentahydrate

≥97%

• Synonym(s): TMAH
• Linear Formula: (CH₃)₄N(OH) · 5H₂O
• CAS Number: 10424-65-4
• Molecular Weight: 181.23
• UNSPSC Code: 12161900
• NACRES: NA.25
• PubChem Substance ID: 24900455
• EC Number: 200-882-9
• Beilstein/REAXYS Number: 3714235
• MDL number: MFCD00149566

Properties

• vapor density: 1.1 (vs air)
• Quality Segment: 200
• description: non-ionic
• assay: ≥97%
• autoignition temp.: 878 °F
• mol wt: 181.23 g/mol
• expl. lim.: 36 %
• mp: 67-70 °C (lit.)
• SMILES string: O.O.O.O.O.[OH-].C[N+](C)(C)C
• InChI: 1S/C4H12N.6H2O/c1-5(2,3)4;;;;;;/h1-4H3;6*1H2/q+1;;;;;;/p-1
• InChI key: MYXKPFMQWULLOH-UHFFFAOYSA-M

Description

General description

Tetramethylammonium hydroxide (TMAOH) is an ion-pairing agent that is usually used in analytical chemistry. It is used in the analysis of marine compounds by thin-layer chromatography-pyrolysis-gas chromatography-mass spectrometry (TLC-pyrolysis-GC/MS) and thermal desorption/capillary GC/inductively coupled plasma mass spectrometry. TMAOH is used in the capillary zone electrophoresis technique for the separation of inorganic anions. Some studies report the oligonucleotide reassociation in the presence of TMAOH. TMAOH aids in the synthesis of organic and inorganic compounds, such as vinyl halides and tetramethylammonium dithiocarboxylates. It is useful in the preparation of iron oxide nanoparticles for use as magnetic resonance imaging contrast agents.

Application

Tetramethylammonium hydroxide pentahydrate has been used in the synthesis of silicalite-1 seed crystals.

Tetramethylammonium hydroxide pentahydrate has been used in a study to assess strains of Pseudomnas species by a single-step gas chromatographic characterization procedure. It has also been used in a study to investigate solid-state metal hydride batteries nickel oxyhydroxide-metal hydride and manganese dioxide-metal hydride.

Safety Information

• pictograms: GHS06,GHS08,GHS05,GHS09
• signalword: Danger
• hcodes: H300 + H310,H314,H370,H372,H411
• pcodes: P260 - P273 - P280 - P303 + P361 + P353 - P304 + P340 + P310 - P305 + P351 + P338
• Hazard Classifications: Acute Tox. 1 Dermal - Acute Tox. 2 Oral - Aquatic Chronic 2 - Eye Dam. 1 - Skin Corr. 1B - STOT RE 1 Dermal - STOT SE 1
• target_organs: Central nervous system, Liver,thymus
• Storage Class: 6.1A - Combustible acute toxic Cat. 1 and 2 / very toxic hazardous materials
• flash_point_f: Not applicable
• flash_point_c: Not applicable
• ppe: Eyeshields, Faceshields, Gloves, type P3 (EN 143) respirator cartridges