Ester base quaternary ammonium salts (esterquats, CAS 91995-81-2) are cationic surfactants widely used as the active ingredient in fabric softeners, hair conditioners and other personal care and industrial formulations. They offer excellent softening, antistatic and conditioning properties with a favorable environmental profile.
Specifications
| Parameter | Specification |
|---|---|
| Appearance | White or light yellow paste |
| Actives | 1.00-1.15 mmol/g |
| Solid content | 87-93% |
| Acid value | 6 mg/g max |
| Amine value | 6 mg/g max |
| pH | 2.0-4.0 |
Applications
- Fabric softener: the standard active for rinse-cycle fabric softeners, delivering softness and antistatic effect.
- Personal care: hair conditioner and rinse-off conditioning formulations.
- Industrial: textile finishing, paper softening and emulsification applications.
Storage and Packaging
Store in a sealed container at room temperature, away from strong acids/bases and oxidizers. Protect from moisture. Supplied with COA and MSDS.
FAQ
What is an esterquat? An ester base quaternary ammonium salt – a quaternary ammonium surfactant containing ester linkages, used mainly in fabric softeners and conditioners.
Why are esterquats preferred over traditional quats? They offer comparable conditioning performance with better biodegradability and a lower environmental profile.
How should esterquats be handled? As a paste, warm slightly before dosing; follow the SDS for handling and storage.




