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Product overview
2-Ethylhexyl acrylate (2-EHA, CAS 103-11-7) is the ester of acrylic acid and 2-ethylhexanol. It is a colorless liquid with a mild, sweet odor, practically insoluble in water but miscible with ethanol and ether. Its branched C8 side chain gives the homopolymer a glass-transition temperature of roughly −70 °C, the lowest of the common acrylate monomers.
Because of this softness and its high boiling point of 238 °C, 2-EHA is the backbone monomer of acrylic pressure-sensitive adhesives, where it provides permanent tack and peel strength without plasticizers. The grade supplied is specified at ≥ 99.5 wt% purity, ≤ 10 APHA color, ≤ 0.05 wt% moisture, ≤ 100 ppm acidity and a density of 0.8820–0.8920 g/cm³ at 20 °C, with 15 ± 5 ppm MEHQ inhibitor.
With a melting point of −90 °C and a flash point of 90 °C, 2-EHA is easier to handle than the lighter acrylates. It is shipped under UN 3082 and supplied by ChemPortal in plastic drums, IBC totes and ISO tank containers.
Key features
- Purity ≥ 99.5 wt%, color ≤ 10 APHA, acidity ≤ 100 ppm
- Low inhibitor level: 15 ± 5 ppm MEHQ
- Homopolymer Tg about −70 °C for permanent tack
- High boiling point 238 °C and flash point 90 °C
- Density 0.8820–0.8920 g/cm³ at 20 °C; UN 3082
Applications
- Acrylic pressure-sensitive adhesives for tapes and labels
- Hot-melt and UV-curable PSA formulations
- Flexible acrylic emulsions for coatings and sealants
- Textile and leather finishing binders
- Plasticizing comonomer for PVC and plastics modifiers
- Impact modifiers and super-absorbent polymer comonomer
Analysis specification
| Parameter | Limit |
|---|---|
| Color (APHA) | ≤ 10 |
| Purity (wt%) | ≥ 99.5 |
| Density (at 20°C) | 0.8820-0.8920 |
| Moisture (wt%) | ≤ 0.05 |
| Acidity (ppm) | ≤ 100 |
| Polymerization inhibitor (MEHQ) | 15±5 ppm |
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Physical properties
- Appearance
- Colorless liquid
- Melting point
- -90 °C
- Boiling point
- 238 °C
- Flash point
- 90 °C
- Solubility
- Can be miscible with ethanol and ether, slightly soluble in water.
Identifiers
| CAS No. | 103-11-7 |
| EINECS No. | 203-080-7 |
| HS code | 2916124000 |
| Formula | C11H20O2 |
| Molecular weight | 184.28 g/mol |
| SMILES | C=CC(=O)OCC(CC)CCCC |
| InChI | InChI=1S/C11H20O2/c1-4-7-8-10(5-2)9-13-11(12)6-3/h6,10H,3-5,7-9H2,1-2H3 |
| InChIKey | GOXQRTZXKQZDDN-UHFFFAOYSA-N |
| Synonyms | 2-ethylhexyl prop-2-enoate, isooctyl acrylate, acrylic acid 2-ethylhexyl ester, octyl acrylate, 2-EHA monomer |
Transport & safety
- UN number
- UN 3082
Dangerous-goods classification and handling instructions are provided in the safety data sheet, available on request.
Packaging & logistics
Standard packaging options. Confirm the packaging, lot size and delivery terms with your quotation.
Frequently asked questions
Why is 2-EHA preferred for pressure-sensitive adhesives?
Its homopolymer is extremely soft and tacky, so PSAs built on 2-EHA bond on contact and stay flexible at low temperature. Copolymerizing it with acrylic acid or methyl methacrylate adds cohesion and peel strength.
Is 2-ethylhexyl acrylate flammable?
It has a flash point of 90 °C, so it is a combustible rather than a highly flammable liquid, which simplifies storage compared with ethyl or methyl acrylate. It is transported as UN 3082; see the SDS for full details.
What inhibitor does the product contain?
15 ± 5 ppm MEHQ. This low level is compatible with direct use in emulsion, solution and UV polymerization; keep air in the headspace of containers so the inhibitor remains effective.
What packaging and lot sizes are offered?
Plastic drums, 1,000 L IBC totes and ISO tank containers; full container loads or part loads can be quoted. Send your quantity and destination port for delivered terms.
Published reference specifications. Confirm the current grade, SDS / TDS / COA, packaging and delivery terms with your quotation.