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CAS 57-09-0 Cetyltrimethylammonium bromide
Overview
Cetyltrimethylammonium bromide (CTAB; Cetrimonium bromide / Hexadecyltrimethylammonium bromide; CAS 57-09-0; C₁₉H₄₂BrN, ~364.45 g/mol) is a cationic quaternary ammonium surfactant with a C16 hydrophobe and a trimethylammonium headgroup that delivers strong conditioning/antistatic, emulsifying–solubilizing, and foaming/co-surfactant performance.
Product Description
CAS 57-09-0 Cetyltrimethylammonium bromide
Cetyltrimethylammonium bromide (CTAB) is a C16 cationic quaternary surfactant that delivers strong conditioning/antistatic and emulsifying performance, forms compact micelles (CMC ~1 mM), and is compatible with nonionic/amphoteric systems but incompatible with anionics.
Cetyltrimethylammonium Bromide (CTAB) — Product Specification
CAS: 57-09-0 | Formula: C19H42BrN | Molecular weight: 364.45 g/mol | Synonyms: Cetrimonium bromide; Hexadecyltrimethylammonium bromide
Identity & Form
| Product form | White crystalline powder (typ. ≥99%) or 25–30% aqueous solution |
|---|---|
| Solubility | Freely soluble in water, ethanol, isopropanol; poor in nonpolar hydrocarbons |
| Compatibility | Compatible with nonionic/amphoteric; incompatible with anionics (precipitation) |
| Documents | COA · TDS · SDS |
Typical Specification — Powder Grade (example)
| Assay (titration) | ≥ 99.0% (as CTAB) |
|---|---|
| Loss on drying | ≤ 1.0% |
| pH (1% aq., 25 °C) | 5.0 – 7.0 |
| Color (APHA) | ≤ 50 |
| Free amine | ≤ 0.30% (w/w) |
| Bromide content (as Br⁻) | 符合化学计量 / Within stoichiometric limits |
| Appearance | White, free-flowing crystals; no visible impurities |
Typical Specification — 30% Aqueous Solution (example)
| Active content | 30.0% ± 1.0% (w/w) |
|---|---|
| pH (10% aq.) | 5.0 – 7.5 |
| Color (APHA) | ≤ 80 |
| Free amine | ≤ 0.50% (w/w) |
| Appearance | Clear to slightly hazy, colorless to pale-yellow liquid |
Applications & Handling
| Main uses | Hair conditioners/creams, fabric softeners, HI&I cleaners, mineral flotation, asphalt/oilfield emulsions, coatings aids, colloid/nanomaterial templating |
|---|---|
| Processing | Add to water phase (40–60 °C) or cold-process with agitation; avoid direct mixing with concentrated anionics |
| Safety | Irritating to skin/eyes; harmful to aquatic life. Avoid strong oxidizers; use appropriate PPE and follow SDS. |
| Storage | Keep tightly closed, cool and dry; protect from moisture and contamination. |
Packaging & Logistics
| Packaging | 25 kg fiber drums / HDPE bags (powder); 200 kg drums · 1000 L IBC (solutions) |
|---|---|
| Ports | Qingdao · Shanghai · Tianjin |
| To quote (please specify) | Grade (powder or solution %), pack size, destination country/port, and required documents |
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Packing and delivery
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