87708

Tetramethylammonium bromide

suitable for ion pair chromatography, LiChropur^™, ≥99.0% (AT)

• Linear Formula: (CH₃)₄N(Br)
• CAS Number: 64-20-0
• Molecular Weight: 154.05
• Beilstein/REAXYS Number: 3620955
• EC Number: 200-581-2
• MDL number: MFCD00011626
• UNSPSC Code: 23151817
• PubChem Substance ID: 329769598
• NACRES: NB.21

Properties

• description: cationic
• Quality Level: 100
• assay: ≥99.0% (AT)
• form: crystals
• quality: LiChropur^™
• technique(s): ion pair chromatography: suitable
• mp: >300 °C (lit.)
• λ: 10 % in H₂O
• UV absorption: λ: 240 nm A_max: 0.06; λ: 250 nm A_max: 0.03; λ: 260 nm A_max: 0.02; λ: 500 nm A_max: 0.02
• suitability: corresponds to standard for filter test

Description

General description

Ion-pairing reagents, when used as mobile phase additives, promote the analysis of ionic and highly polar substances on reversed phase HPLC columns. The purity of mobile phase additives is of highest significance for their effective application. Sigma-Aldrich makes available a variety of tailor-made reagents for anionic (quaternary ammonium and phosphonium salts) and cationic (alkanesulfonates) separations. All mobile phase additives are tested thoroughly with special consideration on the demands of modern reversed phase HPLC:

Application

• pH Standardization in Analytical Chemistry: Buffers serve as critical components in the batch-to-batch reproducibility studies for primary pH methods, ensuring high precision in pH measurement across various scientific disciplines, from pharmaceuticals to environmental science (Asakai et al., 2024).

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Legal Information

LiChropur is a trademark of Merck KGaA, Darmstadt, Germany

Safety Information

• pictograms: GHS06
• signalword: Danger
• hcodes: H300
• pcodes: P301 + P330 + P331 + P310
• Hazard Classifications: Acute Tox. 2 Oral
• Storage Class: 6.1A - Combustible acute toxic Cat. 1 and 2 / very toxic hazardous materials
• wgk_germany: WGK 3
• flash_point_f: Not applicable
• flash_point_c: Not applicable
• ppe: Eyeshields, Faceshields, Gloves, type P2 (EN 143) respirator cartridges