- ▸ Tertiary-amine catalyst for rigid and flexible polyurethane foam
- ▸ High-activity blowing/gelling catalyst with three reactive sites, effective at low loadings
- ▸ Cure acceleration in spray rigid insulation and molded foam systems
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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Tris(3-dimethylaminopropyl)amine is a strong tertiary tetra-amine catalyst for polyurethane — a powerful blowing and cure catalyst that also promotes trimerization, useful in rigid foam and PIR. Identity: CAS 33329-35-0.
What it is
Tris(3-dimethylaminopropyl)amine (CAS 33329-35-0) is a liquid catalyst with three dimethylaminopropyl arms on a central nitrogen. Its multiple basic sites make it highly active.
How it catalyzes
It strongly accelerates the blow and cure reactions and contributes to trimerization (isocyanurate formation), which suits rigid and PIR systems where late cure and crosslink density matter.
Applications
It is used in rigid polyurethane and polyisocyanurate (PIR) foam and as a cure co-catalyst, with gelling and trimerization co-catalysts. For dedicated trimerization see the quaternary ammonium formate.
Forms, grades and handling
Supplied as a clear liquid in drums, IBCs and bulk. Properties are typical reference values; the Certificate of Analysis (CoA) for the lot you buy governs. Amine catalysts are typically corrosive and have a strong odor — handle per the current Safety Data Sheet (SDS). Each lot ships with CoA, TDS and SDS.
Bulk supply and RFQ
RawSource sources Tris direct from producers in bulk, with CoA, TDS and SDS per lot. Tell us your system (flexible/rigid foam, CASE), the reaction balance you need (gel vs blow), and any low-emission requirement, and we will quote the right catalyst or blend. See the full range and gel/blow selection logic in the polyurethane catalysts guide.
Typical Properties
Typical reference values, not a specification; the Certificate of Analysis (CoA) for the lot governs.
| Property | Typical Value |
|---|---|
| Chemical / class | Polyurethane blowing / cure catalyst (tertiary amine) |
| Catalyst action | Blowing / cure (and trimerization) |
| CAS Number | 33329-35-0 |
| Molecular Formula | C15H36N4 |
| Molecular Weight | 272.47 g/mol |
| Handling | Refer to the current SDS |
Regulatory & registration requirements
- TSCA (US):
- REACH (EU):
- EC number: 251-459-0
Source: EPA TSCA Inventory (July 2025 release) · ECHA CHEM — retrieved 2026-07-12
Frequently Asked Questions
What is tris(3-dimethylaminopropyl)amine used for?
Tris(3-dimethylaminopropyl)amine (CAS 33329-35-0) is a strong blowing and cure catalyst for rigid polyurethane and PIR foam that also promotes trimerization; it is used with gelling and trimerization co-catalysts.
How is bulk tris(3-dimethylaminopropyl)amine supplied and quoted?
RawSource supplies tris(3-dimethylaminopropyl)amine in bulk with CoA, TDS and SDS per lot. Pricing is quote-based on grade and volume; submit an RFQ with your PU system and the gel/blow balance you need.
What is the REACH and TSCA regulatory status of Tris(3-dimethylaminopropyl)amine?
Tris(3-dimethylaminopropyl)amine (CAS 33329-35-0) 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 251-459-0).