- ▸ Tertiary-amine co-initiator/synergist that boosts Type II (benzophenone/thioxanthone) cure and overcomes oxygen inhibition in UV coatings (Coatings & Construction)
- ▸ Standard amine synergist in UV/UV-LED inks and overprint varnishes (Industrial Manufacturing)
- ▸ Accelerates surface cure of UV-curable adhesives and plastics (Plastics & Polymers)
A grade-specific Safety Data Sheet (SDS) — with the complete hazard classification, handling precautions, and transport information — is supplied with every shipment and available on request. Confirm all safety and regulatory details against the SDS for your specific grade.
Request SDS →EDB (CAS 10287-53-3) is ethyl 4-(dimethylamino)benzoate, an off-white crystalline solid. Identity: PubChem.
What it is
An aminobenzoate amine synergist. Its tertiary amine donates the hydrogen that an excited Type II initiator abstracts to form curing radicals, and the resulting aminoalkyl radicals are less oxygen-sensitive — so EDB both speeds cure and reduces surface tack from oxygen inhibition.
How it cures
EDB is an amine synergist (co-initiator) — the hydrogen donor that Type II photoinitiators need. Paired with benzophenones or thioxanthones, it accelerates surface cure and helps overcome oxygen inhibition; it is not a standalone initiator.
Applications
EDB is used with Type II initiators — benzophenone, ITX and thioxanthones — in UV coatings and inks to accelerate surface cure. Related synergists: EHA and IAEB.
Forms, grades and handling
EDB is supplied as an off-white crystalline solid (EHA is the liquid 2-ethylhexyl analogue). Photoinitiators are light-sensitive — store cool and dark. Many are fine powders or liquids that require dust/handling controls per the current Safety Data Sheet (SDS). Each lot ships with a Certificate of Analysis (CoA) and Technical Data Sheet (TDS).
Bulk supply and RFQ
RawSource sources Ethyl 4- direct from producers in bulk, with CoA, TDS and SDS per lot. Tell us your lamp (mercury or LED wavelength), system (clear or pigmented) and cure target, and we will quote the right grade or blend. Compare the full range and selection logic in the photoinitiators guide.
Typical Properties
Typical reference values, not a specification; the Certificate of Analysis (CoA) for the lot governs.
| Property | Typical Value |
|---|---|
| Chemical / type | Ethyl 4- — Amine synergist (photoinitiator co-initiator) |
| Role | Amine synergist / co-initiator (for Type II) |
| Function | Hydrogen donor; accelerates surface cure; reduces oxygen inhibition |
| Appearance | Off-white crystalline solid |
| CAS Number | 10287-53-3 |
| Molecular Formula | C11H15NO2 |
| Handling | Light-sensitive; refer to the current SDS |
Regulatory & registration requirements
- TSCA (US):
- REACH (EU):
- EC number: 233-634-3
Source: EPA TSCA Inventory (July 2025 release) · ECHA CHEM — retrieved 2026-07-12
Frequently Asked Questions
What is EDB used for?
EDB (ethyl 4-dimethylaminobenzoate, CAS 10287-53-3) is an amine synergist used with Type II photoinitiators (benzophenone, thioxanthones) to accelerate UV surface cure and overcome oxygen inhibition.
Is EDB a photoinitiator?
No — it is a co-initiator (amine synergist). It does not absorb and cleave on its own; it donates the hydrogen that a Type II initiator needs to form radicals.
What is the difference between EDB, EHA and IAEB?
All are aminobenzoate synergists; EDB is the ethyl ester (solid), EHA the 2-ethylhexyl (liquid, low migration/odor), and IAEB the isoamyl ester. Choose by physical form, migration and solubility.
What is the CAS of EDB?
It is CAS 10287-53-3 (PubChem CID 25127), ethyl 4-(dimethylamino)benzoate. The CoA documents grade.
How is bulk EDB supplied and quoted?
RawSource supplies it in bulk with CoA, TDS and SDS. Pricing is quote-based on grade and volume; submit an RFQ.
What is the REACH and TSCA regulatory status of Ethyl 4-(dimethylamino)benzoate?
Ethyl 4-(dimethylamino)benzoate (CAS 10287-53-3) is subject to U.S. TSCA Inventory requirements; supplying it into the EU requires valid REACH registration ((EC) No 1907/2006). RawSource cannot verify a third-party supplier's registrations — buyers should require documented TSCA and REACH compliance for their jurisdiction and volume (EC 233-634-3).