- ▸ Cycloaliphatic secondary-diamine chain extender/curative for cast PU elastomers
- ▸ Slows reactivity vs aromatic curatives for longer pot life and light-stable (non-yellowing) elastomers
- ▸ Used in high-performance, aliphatic PU coatings and castings
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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4,4′-Methylenebis(N-sec-butylcyclohexylamine) is a secondary cycloaliphatic amine hardener giving long pot life, low color and flexibility — a slow, controllable hardener for thick-section and self-leveling epoxy. Identity: CAS 154279-60-4.
What it is
This product (CAS 154279-60-4) is a liquid N-sec-butyl-substituted bis-cyclohexylamine. Being a hindered secondary amine, it is slow-reacting with long pot life and low color.
How it cures
Its secondary amines cure epoxy slowly at ambient temperature, giving extended working time, low exotherm, light color and flexibility — suited to large castings, self-leveling floors and thick coatings.
Applications
It is used in thick-section castings, self-leveling flooring and low-exotherm epoxy, often as a co-hardener. Compare the secondary aromatic di-sec-butyl MDA.
Forms, grades and handling
Supplied as a clear-to-pale liquid in drums, IBCs 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 4,4′-Methylenebis 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 | Secondary cycloaliphatic amine hardener |
| Cure role | Long pot life; flexible |
| CAS Number | 154279-60-4 |
| Molecular Formula | C21H42N2 |
| Molecular Weight | 322.6 g/mol |
| Handling | Refer to the current SDS |
Regulatory & registration requirements
- TSCA (US):
- REACH (EU):
- EC number: 679-514-8
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 4,4′-methylenebis(N-sec-butylcyclohexylamine) used for?
This secondary cycloaliphatic amine (CAS 154279-60-4) is a slow, long-pot-life epoxy hardener with low color and flexibility, used in thick castings, self-leveling floors and low-exotherm systems.
How is bulk this secondary cycloaliphatic amine supplied and quoted?
RawSource supplies this secondary cycloaliphatic amine 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 4,4'-Methylenebis(N-sec-butylcyclohexylamine)?
4,4'-Methylenebis(N-sec-butylcyclohexylamine) (CAS 154279-60-4) 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 679-514-8).