- ▸ Low-odor, low-migration cure of clear UV coatings and overprint varnishes
- ▸ UV and UV-LED ink systems where extractables must stay low
- ▸ Surface and through cure of clear acrylate UV adhesives and plastics
- ▸ Liquid co-photoinitiator for blended UV packages
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.
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This is a liquid Type I phenylglyoxylate ester blend of an oxydiethylene di-phenylglyoxylate with the corresponding mono-ester. As an oligomeric phenylglyoxylate it delivers low-odor, low-migration surface cure for clear UV systems with very low extractables. Identity: CAS 211510-16-6.
What it is
The blend (representative CAS 211510-16-6) combines a di-functional oxydiethylene phenylglyoxylate ester with its mono-ester. The di-ester/oligomeric structure further lowers volatility, odor and migration versus small-molecule initiators while remaining liquid.
How it cures
A Type I phenylglyoxylate system: UV photolysis of the alpha-ketoester groups generates radicals for direct surface cure with low odor and low migration — no amine required. The multifunctional structure becomes part of the network, minimizing extractables.
Applications
Used for low-migration surface cure of clear UV coatings, overprint varnishes and packaging-adjacent inks, with an acylphosphine oxide (TPO) for through cure. Compare the simpler methyl benzoylformate and ethyl+PEG blend.
Forms, grades and handling
The blend is supplied as a clear liquid. Photoinitiators are light-sensitive — store cool, dry and dark, away from light and ignition sources. Handle 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 Phenylglyoxylate Ester Photoinitiator Blend 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. 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 | Photoinitiator (Type I, phenylglyoxylate blend) |
| Photoinitiator type | Type I (cleavage), phenylglyoxylate blend |
| Absorption | UV (mercury-lamp range) |
| CAS Number | 211510-16-6 |
| Molecular Formula | C20H18O7 |
| Molecular Weight | 370.4 g/mol |
| Handling | Light-sensitive; refer to the current SDS |
Regulatory & registration requirements
- TSCA (US):
- REACH (EU): Not determined from public registry
- EC number: 689-353-5
TSCA Inventory flag PMN: a commenced PMN (premanufacture notice) substance (EPA flag legend).
Source: EPA TSCA Inventory (July 2025 release) · ECHA CHEM — retrieved 2026-07-12
Frequently Asked Questions
What is this di-/mono-ester phenylglyoxylate blend used for?
It is a liquid Type I oligomeric phenylglyoxylate ester blend for low-odor, low-migration surface cure of clear UV coatings, varnishes and packaging-adjacent inks, usually with TPO for through cure.
Why use a phenylglyoxylate ester blend?
Phenylglyoxylate ester blends are liquid Type I initiators chosen for low odor and a favorable low-migration byproduct profile, suiting overprint varnishes and migration-sensitive printing — confirm regulatory suitability for any food-contact use.
How is bulk the phenylglyoxylate ester blend supplied and quoted?
RawSource supplies the phenylglyoxylate ester blend in bulk with CoA, TDS and SDS per lot. Pricing is quote-based on grade and volume; submit an RFQ with your target quantity.
What is the REACH and TSCA regulatory status of Phenylglyoxylate Ester Photoinitiator Blend?
Phenylglyoxylate Ester Photoinitiator Blend (CAS 211510-16-6) is listed as Active on the U.S. EPA TSCA Inventory; its REACH registration status is not determined from the public ECHA registry.