- ▸ Serves as the primary crosslinker (hardener) for carboxyl-functional polyester resins in TGIC-free powder coatings, reacting with terminal -COOH groups to form ester linkages during the cure schedule.
- ▸ Enables formulation of exterior-durable, weather-resistant powder coatings for architectural aluminum, fencing, and outdoor furniture where regulatory restrictions on TGIC apply.
- ▸ Used at typical loadings around 5 percent of binder to deliver high-gloss, chemically resistant finishes with good mechanical flexibility and overbake stability.
- ▸ Functions as a polyfunctional hydroxyl building block and synthesis intermediate for crosslinked polyester and polyurethane networks.
- ▸ Supports low-VOC coil and general industrial powder coating lines seeking a non-isocyanate, non-TGIC curing chemistry.
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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Tetrakis(2-hydroxyethyl)adipamide is the TGIC-free crosslinker for polyester powder coatings — a beta-hydroxyalkylamide (HAA, Primid-type) that cures carboxyl polyesters without TGIC. Identity: CAS 6334-25-4.
What it is
Tetrakis(2-hydroxyethyl)adipamide (CAS 6334-25-4) is a crystalline beta-hydroxyalkylamide with four hydroxyl groups. It is the standard TGIC-free curative for outdoor-durable polyester powder coatings.
How it works
On baking, its hydroxyl groups react with the carboxyl groups of a polyester resin (esterification) to crosslink into a hard, weatherable film; it gives excellent exterior durability and avoids TGIC. It releases water on cure, so degassing/film thickness are managed.
Applications
It is used as the crosslinker in TGIC-free exterior-durable polyester powder coatings (architectural, outdoor). The TGIC route is triglycidyl isocyanurate.
Forms, grades and handling
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 Tetrakis 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 | beta-Hydroxyalkylamide crosslinker |
| Function | TGIC-free powder-coating crosslinker |
| CAS Number | 6334-25-4 |
| Molecular Formula | C14H28N2O6 |
| Handling | Refer to the current SDS |
Regulatory & registration requirements
- TSCA (US):
- REACH (EU):
- EC number: 405-370-0
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 tetrakis(2-hydroxyethyl)adipamide used for?
Tetrakis(2-hydroxyethyl)adipamide (Primid-type HAA, CAS 6334-25-4) is the TGIC-free beta-hydroxyalkylamide crosslinker for carboxyl-polyester powder coatings, giving weatherable exterior-durable films.
How is bulk tetrakis(2-hydroxyethyl)adipamide supplied and quoted?
RawSource supplies tetrakis(2-hydroxyethyl)adipamide 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 N,N,N',N'-Tetrakis(2-Hydroxyethyl)adipamide?
N,N,N',N'-Tetrakis(2-Hydroxyethyl)adipamide (CAS 6334-25-4) 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 405-370-0).