| Melting Point | 245–250°C (lit.) |
| pH | 4.0 - 7.0 (50g/L) |
| Color | White |
| Linear Formula | CH3(CH2)13N(Br)(CH3)3 |
| Formula Weight | 336.40 |
| Physical Form | Crystal-Powder at 20°C |
| Chemical Name or Material | Tetradecyltrimethylammonium Bromide |
| Molecular Weight | 336.39 g/mol |
| SMILES String | [Br-].CCCCCCCCCCCCCC[N+](C)(C)C |
| Assay | ≥99% |
| Solubility | H2O: 10% (w/v) |
| CAS Number | 1119-97-7 |
| EC Number | 214-291-9 |
| NACRES | NA.25 |
| PubChem Substance ID | 24900223 |
| UNSPSC Code | 12161900 |
| MDL Number | MFCD00011770 |
| Critical Micelle Concentration (CMC) | 4–5 mM (20–25°C) |
| Beilstein/REAXYS Number | 3633227 |
| InChIKey | CXRFDZFCGOPDTD-UHFFFAOYSA-M |
MTAB is a quaternary ammonium surfactant — a positively charged “head group” attached to a 14-carbon (myristyl) tail. That cationic charge is what gives it antimicrobial activity and makes it useful for depositing conditioning/antistatic layers onto negatively charged surfaces like hair and fabric.
MTAB is manufactured into cationic surfactant systems for hair-conditioning and fabric-softening formulations, and into antimicrobial preservative systems for personal-care and industrial products. In research settings, it’s also used as a membrane-solubilizing surfactant in protein-quantification assays.
