Morpholine (CAS 110-91-8) is much more than a corrosion inhibitor — it is a key building block in rubber chemicals, pharmaceuticals, surfactants and optical brighteners. Its secondary-amine and ether structure makes it a versatile intermediate for a wide range of chemical syntheses. This guide covers morpholine’s role as a chemical intermediate across industries.
1. The Morpholine Molecule
Morpholine is a six-membered heterocycle with one oxygen and one nitrogen atom — an amine-ether hybrid. This dual functionality (reactive secondary amine + stable ether) makes it valuable in synthesis: the amine reacts readily, while the ether confers stability and solubility.
2. Key Intermediate Applications
2.1 Rubber chemicals
Morpholine derivatives are used in rubber accelerators and vulcanization chemistry — for example, sulfenamide-type accelerators based on morpholine.
2.2 Pharmaceuticals
Morpholine rings appear in many drug molecules (e.g. linezolid and other pharmaceuticals); morpholine itself is a building block in pharma synthesis.
2.3 Surfactants and emulsifiers
Morpholine fatty acid soaps are used as emulsifiers and corrosion inhibitors; morpholine derivatives appear in cleaning and metalworking formulations.
2.4 Optical brighteners and dyes
Morpholine is a substituent in some optical brighteners (fluorescent whitening agents) and dyestuffs.
2.5 Other
- N-methylmorpholine and N-methylmorpholine-N-oxide (NMMO, used in the Lyocell fiber process)
- Morpholine-based catalysts and reagents
- Waxes and polishes (morpholine soaps)
3. What Buyers Should Know
- Morpholine is supplied as a clear liquid (typically 99%+ purity).
- It is hygroscopic and corrosive — handle with care, store sealed.
- Verify purity, water content and amine value on the COA.
- It is a regulated chemical in some regions (watch-listed for its dual use); confirm export/import requirements.
4. FAQ
What is morpholine used for in industry?
Corrosion inhibition, rubber chemicals, pharmaceutical intermediates, surfactants, optical brighteners and fiber processing (NMMO).
Is morpholine a hazardous chemical?
It is corrosive and irritating, and it is watch-listed in some jurisdictions — follow the SDS and check regulatory status.
What purity of morpholine should I buy?
Typically 99%+ for chemical use; verify water and impurities on the COA.
Is morpholine related to acryloylmorpholine?
Related — acryloylmorpholine (ACMO) is an acrylate-functional morpholine derivative used in UV-curable systems. See our ACMO guide.
5. References and Further Reading
- Peer-reviewed and industry literature on morpholine chemistry
- Chemical safety data (SDS) and regulatory references
This article is published for industrial and technical reference by PolyblueChem. Verify regulatory status for your market.
PolyblueChem supplies morpholine (CAS 110-91-8) with COA and MSDS. See our morpholine guide. Contact us for specifications and quotations.