- ▸ Aromatic primary diamine curing agent for epoxy resins, delivering a high-Tg, chemically resistant cured network for tank linings and industrial floor coatings
- ▸ Crosslinks DGEBA and bisphenol-F epoxies in composites and protective coatings where heat-distortion resistance is required
- ▸ Used as a hardener where rigid, solvent-resistant epoxy service is the design target
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 →
Para-xylylenediamine (PXDA) is an araliphatic amine hardener — benzylic amines on an aromatic ring giving fast cure with high chemical and barrier performance, used in high-end coatings and as a monomer. Identity: CAS 539-48-0.
What it is
Para-xylylenediamine (CAS 539-48-0) is a crystalline araliphatic diamine. Its benzylic primary amines combine aliphatic-amine reactivity with aromatic-ring rigidity, and it is also a barrier-polymer monomer (e.g. for MXD-type polyamides in the meta isomer).
How it cures
Its benzylic amines cure epoxy quickly to a hard, chemically resistant network with good barrier properties; it is valued in coatings needing fast cure and performance.
Applications
PXDA is used in high-performance epoxy coatings and adhesives and as a specialty monomer. Compare cycloaliphatic 1,3/1,4-BAC.
Forms, grades and handling
PXDA is supplied as a crystalline solid/molten grade in drums and bulk. Properties are typical reference values; the Certificate of Analysis (CoA) for the lot you buy governs. Amine curing agents are typically corrosive and can sensitize skin — handle per the current Safety Data Sheet (SDS). Each lot ships with CoA, TDS and SDS.
Bulk supply and RFQ
RawSource sources Para-Xylylenediamine direct from producers in bulk, with CoA, TDS and SDS per lot. Tell us your resin system, cure schedule (ambient or heat) and the properties you need (pot life, Tg, flexibility, chemical resistance), and we will quote the right hardener. See selection logic in 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 | Araliphatic amine hardener |
| Cure role | Ambient/fast cure; high performance |
| CAS Number | 539-48-0 |
| Molecular Formula | C8H12N2 |
| Molecular Weight | 136.19 g/mol |
| Handling | Refer to the current SDS |
Regulatory & registration requirements
- TSCA (US):
- REACH (EU):
- EC number: 208-719-3
Source: EPA TSCA Inventory (July 2025 release) · ECHA CHEM — retrieved 2026-07-12
Frequently Asked Questions
What is para-xylylenediamine (PXDA) used for?
Para-xylylenediamine (PXDA, CAS 539-48-0) is an araliphatic amine epoxy hardener giving fast cure and high chemical/barrier performance in high-end coatings and adhesives; it is also a specialty polyamide monomer.
How is bulk para-xylylenediamine supplied and quoted?
RawSource supplies para-xylylenediamine in bulk with CoA, TDS and SDS per lot. Pricing is quote-based on grade and volume; submit an RFQ with your resin system and cure schedule.
What is the REACH and TSCA regulatory status of Para-Xylylenediamine (PXDA)?
Para-Xylylenediamine (PXDA) (CAS 539-48-0) 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 208-719-3).