Tetrabutylammonium bromide
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We are now going to use a raw material called tetrabutylammonium bromide; who knows its properties?
It should be tetrabutylammonium bromide, also known as ammonium tetrabutyl bromide. Other names include TBAB, TBA bromide, and tetra-n-butylammonium bromide. Molecular formula: C16H36BrN; Molecular weight: 322.37; CAS number: 1643-19-2. Melting point: 103–104°C. The pure substance appears as white crystals or powder, has a distinctive odor, and is stable at normal temperature and pressure. Soluble in water, alcohol, and propylene. Water solubility 600 g/L (20°C). Use: Ion-pair reagent, used in the synthesis of ampicillin, sustamycin, etc ； It is also an effective phase-transfer catalyst. Toxicity: Acute oral LD50 (mice): 590 mg/kg. Inhalation, ingestion, and skin contact are toxic; it is irritating to the skin, eyes, and respiratory system