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Send EmailHydroxyethyl Acrylate, 2-Hydroxyethyl Acrylate, Ethylene Glycol Monoacrylate, HEA, 2-HEA, 818-61-1
CAS Number: 818-61-1
EC Number (EINECS): 212-454-9
Molecular Formula: C₅H₈O₃
Molecular Weight: 116.12 g/mol
Chemical Class: Acrylate ester (functional monomer)
| Parameter | Description |
|---|---|
| Chemical Name (IUPAC) | 2-Hydroxyethyl prop-2-enoate |
| Other Names | 2-HEA, Hydroxyethyl Acrylate, Ethylene glycol monoacrylate, 2-Hydroxyethyl acrylate, Acrylic acid 2-hydroxyethyl ester |
| CAS Number | 818-61-1 |
| EC Number (EINECS) | 212-454-9 |
| Molecular Formula | C₅H₈O₃ |
| Molecular Weight | 116.12 g/mol |
| Chemical Class | Acrylate ester (functional monomer) |
| Structure | CH₂=CH-COO-CH₂-CH₂OH |
| Appearance | Clear, colorless liquid |
| Physical State | Liquid |
| Odor | Ester-like |
| Functional Groups | Acrylate (C=C), hydroxyl (-OH) |
| Purity | ≥ 98.5% |
| Inhibitor | 250 ± 50 ppm MEHQ |
| Property | Value / Range |
|---|---|
| Molecular Formula | C₅H₈O₃ |
| Molecular Weight | 116.12 g/mol |
| Appearance | Clear, colorless liquid |
| Odor | Ester-like |
| Density (25°C) | ~1.106 g/cm³ |
| Boiling Point | ~200°C |
| Freezing Point | < -60°C |
| Flash Point | ~101°C |
| Viscosity (25°C) | ~11.17 mPa·s |
| Vapor Pressure (21.4°C) | 0.1 mbar |
| Purity | ≥ 98.5% |
| Acid Content | ≤ 2.5 mg KOH/g |
| Water Content | ≤ 0.15% |
| Color (APHA) | ≤ 10 |
| Inhibitor | 250 ± 50 ppm MEHQ |
| Solubility in Water | Soluble (miscible) |
| Solubility in Organic Solvents | Soluble in alcohols, ethers, and most organic solvents |
| Property | Description |
|---|---|
| Chemical Class | Acrylate ester (functional monomer) |
| Functional Groups | Acrylate (C=C), hydroxyl (-OH) |
| Reactivity | Very high; readily polymerizes |
| Polymerization | Free-radical polymerization (bulk, solution, emulsion) |
| Copolymerization | Copolymerizes with (meth)acrylic acid and salts, amides, esters, methacrylates, acrylonitrile, maleic esters, butadiene, and other monomers |
| Hydroxyl Reactivity | Enables further functionalization via esterification, etherification, isocyanate reactions |
| Thermal Decomposition | > 200°C releases CO, CO₂, and irritant vapors |
| Hydrolysis | Hydrolyzes in acidic/basic media to acrylic acid and ethylene glycol |
| Oxidation | May form peroxides in air |
| Reaction Type | Description |
|---|---|
| Radical Polymerization | Forms homopolymers and copolymers |
| Copolymerization | With acrylates, methacrylates, styrene, vinyl acetate, butadiene |
| Hydroxyl Reactions | Esterification, etherification, isocyanate reaction |
| Hydrolysis | Acrylic acid + Ethylene glycol |
| Property | Description |
|---|---|
| Chemical Resistance | Provides good chemical resistance |
| Crosslinking | Enables crosslinking via hydroxyl group |
| Scratch Resistance | Provides good scratch resistance |
| Adhesion | Good adhesion properties |
| Low VOC | Low volatile organic compound content |
| Rheology Modification | Used as rheology modifier |
| Weather Resistance | Good weather resistance |
| Hydrophilicity | Hydrophilic character due to hydroxyl group |
| Application | Function | Suitability |
|---|---|---|
| Automotive Coatings | Co-monomer, crosslinker | High |
| Industrial Coatings | Co-monomer, crosslinker | High |
| UV Curable Coatings | Reactive diluent, co-monomer | High |
| Architectural Coatings | Co-monomer | High |
| Paper Coatings | Co-monomer | High |
| Application | Function | Suitability |
|---|---|---|
| Adhesives | Co-monomer, adhesion promoter | High |
| Sealants | Co-monomer, crosslinker | High |
| Pressure-Sensitive Adhesives | Co-monomer | High |
| Structural Adhesives | Co-monomer | High |
| Application | Function | Suitability |
|---|---|---|
| Concrete Additives | Co-monomer, modifier | High |
| Cement Modifiers | Co-monomer | High |
| Application | Function | Suitability |
|---|---|---|
| Plastics | Co-monomer, modifier | High |
| Polymer Solutions | Co-monomer | High |
| Dispersions | Co-monomer | High |
| Application | Function | Suitability |
|---|---|---|
| Binders | Polymeric binder | High |
| Film Formers | Film-forming polymer | High |
| Industry | Suitability | Explanation |
|---|---|---|
| Coatings | High | Automotive, industrial, UV coatings |
| Adhesives | High | Pressure-sensitive, structural adhesives |
| Construction | High | Concrete additives, cement modifiers |
| Plastics | High | Modification, polymer solutions |
| Textiles | High | Textile processing |
| Paper | High | Paper coatings |
| Cosmetics | Not suitable | Not used in cosmetics |
| Food | Not suitable | Not used as food additive |
| Type | Name / Description |
|---|---|
| IUPAC Name | 2-Hydroxyethyl prop-2-enoate |
| Commercial Names | 2-HEA, Hydroxyethyl Acrylate, Bisomer 2HEA |
| Synonyms | Ethylene glycol monoacrylate, Acrylic acid 2-hydroxyethyl ester, 2-(Acryloyloxy)ethanol, Hydroxyethyl acrylate |
| CAS Number | 818-61-1 |
| EC Number | 212-454-9 |
| HS Code | 29161200 |
| Parameter | Value / Description |
|---|---|
| GHS Classification | Warning |
| Hazard Statements | H302 (Harmful if swallowed), H315 (Causes skin irritation), H317 (May cause allergic skin reaction), H319 (Causes serious eye irritation), H335 (May cause respiratory irritation) |
| Precautionary Statements | P261 (Avoid breathing dust/fume/gas/mist/vapors/spray), P280 (Wear protective gloves/protective clothing/eye protection/face protection), P302+P352 (IF ON SKIN: Wash with plenty of water), P305+P351+P338 (IF IN EYES: Rinse cautiously with water) |
| Oral LD50 (Rat) | ~1,000-2,000 mg/kg |
| Dermal LD50 (Rabbit) | > 2,000 mg/kg |
| Skin Irritation | Irritant |
| Eye Irritation | Irritant |
| Skin Sensitization | Positive (allergic contact dermatitis) |
| Mutagenicity | Negative |
| Carcinogenicity | Not classified |
| Target Organs | Skin, eyes, respiratory system |
| Parameter | Information |
|---|---|
| Storage Conditions | Cool, dry, well-ventilated area |
| Temperature | 15–25°C (store under inert atmosphere) |
| Container | Tightly closed, dark, stainless steel or HDPE containers |
| Special Requirements | Must contain inhibitor (MEHQ); avoid extreme temperatures |
| Sunlight Protection | Protect from direct sunlight |
| Moisture Sensitivity | Protect from moisture |
| Shelf Life | 12 months (under recommended conditions) |
| Packaging | 200 kg drum, 1000 kg IBC |
| Parameter | Information |
|---|---|
| UN Number | Not regulated (not classified as dangerous goods) |
| Hazard Class | Not applicable |
| Packing Group | Not applicable |
| Proper Shipping Name | 2-Hydroxyethyl Acrylate |
| ADR/RID | Not regulated |
| IMDG Code | Not regulated |
| IATA (Air) | Not regulated |
| Marine Pollutant | No |
| Parameter | Information |
|---|---|
| Fire Hazard | Combustible liquid (flash point ~101°C) |
| Extinguishing Media | Water fog, foam, CO₂, dry chemical |
| Special Hazards | When heated, releases CO, CO₂, and irritant vapors |
| Decomposition Products | CO, CO₂, acrylate vapors |
| Protective Equipment | Self-contained breathing apparatus (SCBA), full protective clothing |
| Explosion Risk | Vapor/air mixtures may be explosive at high temperatures |
| Parameter | Information |
|---|---|
| Personal Protection | Gloves, safety goggles, face shield, protective clothing |
| Ventilation | Increase ventilation; evacuate area |
| Cleanup Methods | Absorb with inert absorbent material; collect in sealed containers |
| Environmental Precautions | Prevent entry into drains and water bodies |
| Waste Disposal | According to local regulations; incineration (hazardous waste) |
| Exposure Route | Action |
|---|---|
| Inhalation | Move to fresh air. Administer oxygen if breathing difficulty. Seek medical attention. |
| Skin Contact | Remove contaminated clothing. Wash with soap and plenty of water for at least 15 minutes. Seek medical attention. |
| Eye Contact | Rinse with plenty of water for at least 15 minutes. Seek medical attention. |
| Ingestion | Do NOT induce vomiting. Drink plenty of water. Seek medical attention. |
| Region / Authority | Status |
|---|---|
| EU REACH | Registered |
| Turkey KKDİK | Registration required |
| USA TSCA | Listed |
| EINECS | 212-454-9 |
| WGK (Germany) | 1 (slight hazard to water) |
| RoHS | Compliant |
| California Prop 65 | Not listed |
| Parameter | Value |
|---|---|
| Product | 2-Hydroxyethyl Acrylate (2-HEA) |
| CAS | 818-61-1 |
| Appearance | Clear, colorless liquid |
| Density | ~1.106 g/cm³ |
| Boiling Point | ~200°C |
| Flash Point | ~101°C |
| Key Industries | Coatings, adhesives, concrete additives, plastics |
Functional Monomer: 2-HEA is a functional monomer containing both acrylate and hydroxyl groups. This dual functionality enables polymerization and further functionalization.
Hydroxyl Reactivity: The hydroxyl group enables further chemical reactions such as esterification, etherification, and isocyanate reactions. This enables crosslinking and polymer modification.
Versatile Copolymerization: Copolymerizes with (meth)acrylic acid and salts, amides, esters, methacrylates, acrylonitrile, maleic esters, butadiene, and other monomers.
High Reactivity: 2-HEA has very high reactivity due to the acrylate group, making it suitable for fast-curing systems.
Polymerization Risk: Readily polymerizes; always contains inhibitor (MEHQ). Keep away from heat and light.
Skin Sensitizer: 2-HEA may cause allergic skin reactions (H317). Appropriate PPE required.
Low VOC: Low volatile organic compound content makes it suitable for environmentally friendly formulations.
Storage: Store in cool, dark, well-ventilated areas under inert atmosphere. Shelf life is 12 months.
Versatile Applications: Used in automotive coatings, industrial coatings, concrete additives, adhesives, plastics, and as binders and film formers.
Regulatory Status: Registered under REACH. Not classified as dangerous goods.
IMPORTANT DISCLAIMER: This Technical Data Sheet (TDS) is for informational purposes only and is based on available technical data. The user is solely responsible for determining the product's suitability for their specific application and for complying with all applicable local, national, and international regulations. 2-HEA readily polymerizes and is a known skin sensitizer! For complete safety, storage, handling, transportation, disposal, and regulatory compliance information, always refer to the official Safety Data Sheet (SDS/MSDS) provided by the manufacturer/supplier. Users are responsible for testing the product in their own processes and applications. All local, national, and international regulations must be followed when working with 2-HEA.