- ▸ Primary crosslinker (hardener) for carboxyl-functional polyester powder coatings, where its three epoxide groups react with polymer-bound -COOH to build dense, durable thermoset films.
- ▸ Used in TGIC-polyester systems for exterior-durable architectural, automotive-trim, and general-industrial powder coatings that demand high weatherability and mechanical toughness.
- ▸ Serves as a multifunctional epoxy chemical intermediate for synthesizing high-crosslink-density thermosets and modified epoxy networks.
- ▸ Acts as a heat-curable crosslinking agent in select electrical-insulation and encapsulation thermoset formulations requiring thermal and chemical resistance.
- ▸ Employed at low loadings as a reactive modifier to raise glass-transition temperature, hardness, and solvent resistance in cured epoxy/polyester matrices.
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 →⚠ WARNING: This product can expose you to Triglycidyl Isocyanurate, which is known to the State of California to cause birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.
Triglycidyl isocyanurate (TGIC) is the classic crosslinker for carboxyl-polyester powder coatings — a trifunctional epoxy that cures weatherable exterior-durable powder coatings. Identity: CAS 2451-62-9.
What it is
TGIC (CAS 2451-62-9) is a crystalline trifunctional epoxy (three glycidyl groups on an isocyanurate ring). It is the long-standing crosslinker for outdoor-durable polyester powder coatings.
How it works
On baking, its epoxy groups react with the carboxyl groups of a polyester resin to crosslink into a hard, weatherable film with excellent exterior durability, mechanical and chemical resistance. Used at a defined stoichiometry with the polyester.
Applications
TGIC is used as the crosslinker in exterior-durable polyester powder coatings (architectural, automotive trim, outdoor furniture). A TGIC-free alternative is tetrakis(2-hydroxyethyl)adipamide (Primid).
Forms, grades and handling
TGIC is supplied as a fine crystalline powder in bags and drums. Properties are typical reference values; the Certificate of Analysis (CoA) for the lot you buy governs. Isocyanates are moisture-sensitive and require respiratory/skin precautions; handle per the current Safety Data Sheet (SDS). Each lot ships with CoA, TDS and SDS.
Bulk supply and RFQ
RawSource sources Triglycidyl Isocyanurate direct from producers in bulk, with CoA, TDS and SDS per lot. Tell us your binder system, cure schedule and the performance you need, and we will quote the right grade. See the epoxy curing agents guide.
Typical Properties
Typical reference values, not a specification; the Certificate of Analysis (CoA) for the lot governs.
| Property | Typical Value |
|---|---|
| Chemical / class | Epoxy-functional crosslinker (TGIC) |
| Function | Powder-coating crosslinker (for polyester) |
| CAS Number | 2451-62-9 |
| Molecular Formula | C12H15N3O6 |
| Handling | Refer to the current SDS |
Regulatory & registration requirements
- TSCA (US):
- REACH (EU):
- EC number: 219-514-3
Source: EPA TSCA Inventory (July 2025 release) · ECHA CHEM — retrieved 2026-07-12
Regulatory restriction status
Triglycidyl Isocyanurate (TGIC) (CAS 2451-62-9) appears on the regulatory list(s) below. This is public regulatory information about the substance — not a statement about any specific supplier’s material, and not a safety claim. Confirm the current status for your jurisdiction and intended use.
- California Proposition 65: listed for reproductive toxicity, listed 7 Aug 2009. A California Proposition 65 warning applies (see the warning above).
- REACH SVHC Candidate List (EU): listed 18 Jun 2012 on the basis of mutagenic (Art. 57(b)). SVHC status triggers EU supplier-communication and notification duties above 0.1% w/w; it is not, by itself, a ban on sale.
Sources: ECHA Candidate List / Annex XIV / Annex XVII (echa.europa.eu); U.S. EPA TSCA; UN Stockholm Convention / EU POPs Regulation; California OEHHA Proposition 65 list. Retrieved 2026-07-13.
Frequently Asked Questions
What is triglycidyl isocyanurate (TGIC) used for?
TGIC (CAS 2451-62-9) is a trifunctional epoxy crosslinker for carboxyl-polyester powder coatings, giving weatherable, exterior-durable films; it reacts with polyester carboxyl groups on baking.
Is there a TGIC-free alternative?
Yes — tetrakis(2-hydroxyethyl)adipamide (Primid-type, a beta-hydroxyalkylamide) is the common TGIC-free crosslinker for polyester powder coatings, used where TGIC is to be avoided.
How is bulk TGIC supplied and quoted?
RawSource supplies TGIC in bulk with CoA, TDS and SDS per lot. Pricing is quote-based on grade and volume; submit an RFQ with your binder system and cure schedule.
What is the REACH and TSCA regulatory status of Triglycidyl Isocyanurate?
Triglycidyl Isocyanurate (CAS 2451-62-9) 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 219-514-3).