Overview
Methacrylatoethyl trimethyl ammonium chloride (CAS 5039-78-1 ), commercially known as METAC, is a cationic quaternary ammonium monomer used as a reactive building block in polymer synthesis.
It introduces permanent positive charge into polymer chains, enabling the production of cationic polyelectrolytes and functional coatings across multiple industrial sectors.
In paper manufacturing, METAC-based polymers function as retention aids and wet-strength additives, improving fiber bonding and filler retention during sheet formation.
Textile processors use cationic polymers derived from METAC to improve dye uptake and substrate adhesion on negatively charged fibers during the manufacturing process.
In leather processing, it contributes to the formulation of cationic fixatives and surface treatment agents that enhance finish durability and overall product quality.
The plastics and polymers sector uses METAC as a comonomer in superabsorbent polymer networks and antistatic coatings where its quaternary nitrogen group provides permanent charge.
METAC is supplied as an aqueous solution, typically at concentrations of 75–80% active content. It is available in technical grade for industrial polymerization applications.
Packaging ranges from drums to IBC totes, suited to bulk procurement requirements in polymer manufacturing operations and large scale chemical distribution networks.
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Physical Properties
| Melting Point | -25°C |
| Boiling Point | >100°C |
| Density | 1.105 g/mL at 25 °C |
| Flash Point | >100°C |
| Appearance | aqueous solution |
| Color | Colorless to Almost colorless |
| Form | clear liquid |
| Water Solubility | It is soluble in water. |
| Refractive Index | n 20/D 1.469 |
| Log P | -2.49 at 20℃ and pH7 |
Safety & Handling
Warning GHS07 Hazard Statements H315 Causes skin irritation H317 May cause an allergic skin reaction H319 Causes serious eye irritation H335 May cause respiratory irritation Precautionary Statements P261 Avoid breathing dust/fume/gas/mist/vapours/spray. P264 Wash … thoroughly after handling. P271 Use only outdoors or in a well-ventilated area. P272 Contaminated work clothing should not be allowed out of the workplace. P280 Wear protective gloves/protective clothing/eye protection/face protection. P319 Get medical advice/attention if you feel unwell. P321 Specific treatment (see … on this label). P405 Store locked up. P501 Dispose of contents/container in accordance with local regulations. P264+P265 Wash … thoroughly after handling. P302+P352 IF ON SKIN: Wash with plenty of water. P304+P340 IF INHALED: Remove person to fresh air and keep comfortable for breathing. P332+P317 Get emergency medical help. P333+P317 Get emergency medical help. P337+P317 If eye irritation persists: Get medical advice/attention. Get emergency medical help. P362+P364 Take off contaminated clothing and wash it before reuse. P403+P233 Store in a well-ventilated place. Keep container tightly closed. P305+P351+P338 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.
Trade & Regulatory
| HS Code | 29239000 |
| Storage Class | 10 - Combustible liquids |
| WGK (Germany) | 1 |
Other Names
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Chemical Properties
- CAS Number
- 5039-78-1
- EC Number
- 225-733-5
- Mol. Weight
- 207.70
- HS Code
- 29239000
- Category
- Monomers & Building Blocks