**English Name:** CTAB, Hexadecyltrimethylammonium Bromide, Cetyltrimethylammonium Bromide, Cetrimonium Bromide, Palmityl Trimethylammonium Bromide
**Other Names:** Cetyl Trimethylammonium Bromide, Cetrimonium Bromide, Bromo Brown Trimethylammonium
**CAS Number:** 57-09-0
**Molecular Formula:** Câ‚₉Hâ‚„â‚‚BrN
**Molar Mass:** 364.45 g/mol
**Grade:** AR (Analytical Reagent)
**Purity:** ≥99.0%
**Moisture Content:** ≤0.5%
**Acidity (in Hâº):** ≤1.0 mmol/100g
**Ethanol Solubility Test:** Qualified
**Heavy Metal Content:** ≤0.0005%
**Ignition Residue:** ≤0.1%
**Appearance:** White microcrystalline powder
CTAB is a quaternary ammonium salt known for its surfactant properties. It is hygroscopic and stable in acidic conditions. It dissolves in water (10 parts), is soluble in ethanol, slightly soluble in acetone, and almost insoluble in ether and benzene. The melting point ranges from 237 to 243 °C.
It has a median lethal dose (LDâ‚…â‚€) of 44 mg/kg in rats via intravenous administration. CTAB can be irritating to the eyes, respiratory system, and skin, so proper safety precautions should be taken when handling it.
**Applications:**
- Used in biochemical research
- Colorimetric or photometric determination of bismuth and tin
- Inhibitor of intestinal glucose absorption
- Phase transfer catalyst for the reduction of aromatics and epoxidation of olefins
- Surfactant and emulsifier
- Fungicide and disinfectant
**Storage:** Store at room temperature (RT), away from moisture and heat.
This compound is widely utilized in laboratory settings due to its versatile chemical properties and effectiveness in various analytical and industrial applications. Always handle with care and follow recommended safety guidelines.
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