Hexadecyltrimethylammonium bromide appears as white to light-yellow crystals or powder. It is readily soluble in isopropanol, soluble in water, and generates abundant foam when shaken. The compound shows excellent compatibility with cationic, nonionic, and amphoteric surfactants. It offers outstanding penetration, softening, emulsifying, antistatic, biodegradable, and bactericidal properties. In addition, it demonstrates strong chemical stability along with resistance to heat, light, pressure, and both strong acids and alkalis.
Hexadecyl trimethyl ammonium bromide Chemical Properties
| Melting point | 248-251 °C(lit.) |
| Density | 1.1107 (rough estimate) |
| Refractive index | 1.5260 (estimate) |
| Fp | 244 °C |
| Storage temp | Store below +30°C. |
| Solubility | H2O: 50 mg/mL |
| Form | Powder |
| Color | white |
| PH | 5.0-7.0 (25℃, 0.1M in H2O) |
| Odor | Odorless |
| PH Range | 5 - 7 |
| Water Solubility | 13 g/L (20 ºC) |
| Sensitive | Hygroscopic |
| λmax | λ: 260 nm Amax: 0.06 λ: 280 nm Amax: 0.05 |
| Merck | 14,2025 |
| BRN | 3598189 |
| Stability | Stable. Incompatible with strong oxidizing agents. Protect from moisture. |
| InChIKey | LZZYPRNAOMGNLH-UHFFFAOYSA-M |
| CAS DataBase Reference | 57-09-0(CAS DataBase Reference) |
| EPA Substance Registry System | Cetyl trimethyl ammonium bromide (57-09-0) |
Safety Information
| Hazard Codes | Xn,N |
| Risk Statements | 22-37/38-41-50-50/53-36/37/38-48/22 |
| Safety Statements | 26-39-61-37/39-60-36 |
| RIDADR | UN 3077 9/PG 3 |
| WGK Germany | 3 |
| RTECS | BQ7875000 |
| F | 3 |
| TSCA | Yes |
| HazardClass | 9 |
| PackingGroup | III |
| HS Code | 29239000 |
| Toxicity | LD50 in mice, rats (mg/kg): 32.0, 44.0 i.v. (Isomaa, Bjondahl) |
Product Application of Hexadecyltrimethylammonium Bromide (CAS#57-09-0)
This compound exhibits excellent penetrating, softening, emulsifying, antistatic, biodegradable, and bactericidal properties. It also features strong chemical stability with resistance to heat, light, pressure, as well as strong acids and alkalis. Applications include use as an emulsifier for natural and synthetic rubber, silicone oil, and asphalt; as an antistatic agent and softener for synthetic, natural, and glass fibers; and as a conditioning ingredient in hair care formulations.
