- ▸ Tertiary-amine catalyst for polyester-polyol polyurethane flexible block foam
- ▸ Mild basic catalyst that promotes the urethane cure reaction
- ▸ Also serves as an acid scavenger/base in related industrial syntheses
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-Methylmorpholine (NMM) is a mild tertiary amine catalyst, base and solvent/intermediate — used as a co-catalyst in polyurethane and widely as a base in organic synthesis. Identity: CAS 109-02-4.
What it is
4-Methylmorpholine (CAS 109-02-4) is a liquid cyclic tertiary amine. It is multi-functional: a mild PU co-catalyst, a base/acid-scavenger in synthesis, and a solvent/intermediate.
How it catalyzes
As a catalyst it gives mild general activity, useful as a co-catalyst or where a gentler amine is wanted; outside PU it is a common base (e.g. in peptide/ester coupling) and intermediate.
Applications
NMM is used as a polyurethane co-catalyst, a base in organic synthesis, and a solvent/intermediate. Stronger gelling alternative: TEDA.
Forms, grades and handling
NMM is 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 4-Methylmorpholine 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 | Catalyst / base / intermediate (cyclic tertiary amine) |
| Catalyst action | General (mild) / intermediate |
| CAS Number | 109-02-4 |
| Molecular Formula | C5H11NO |
| Molecular Weight | 101.15 g/mol |
| Handling | Refer to the current SDS |
Regulatory & registration requirements
- TSCA (US):
- REACH (EU):
- EC number: 203-640-0
Source: EPA TSCA Inventory (July 2025 release) · ECHA CHEM — retrieved 2026-07-12
Frequently Asked Questions
What is 4-methylmorpholine (NMM) used for?
4-Methylmorpholine (NMM, CAS 109-02-4) is a mild tertiary amine used as a polyurethane co-catalyst, as a base/acid-scavenger in organic synthesis, and as a solvent/intermediate.
How is bulk 4-methylmorpholine supplied and quoted?
RawSource supplies 4-methylmorpholine 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 4-Methylmorpholine (NMM)?
4-Methylmorpholine (NMM) (CAS 109-02-4) 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 203-640-0).