N,N,4-Trimethylaniline
A tertiary aromatic amine supplied as a highly activated coupling component for azo dye synthesis and as a redox accelerator in polymer curing systems.
What is N,N,4-Trimethylaniline?
N,N,4-Trimethylaniline is a colourless to pale yellow liquid built on a toluidine ring in which the amine nitrogen carries two methyl groups in addition to the ring methyl at the 4 (para) position.
The fully N,N-dimethylated amine strongly activates the ring toward electrophilic attack, making the molecule an efficient coupling component in azo dye synthesis. The same electron-rich amine also makes it an effective redox accelerator, which is why the compound is widely used to promote free-radical curing in polymer and composite resin systems.
At Chelora Dyes, N,N,4-Trimethylaniline is distilled and quality-checked to a controlled purity and low moisture level, so coupling and curing reactions downstream run cleanly and give consistent, reproducible results batch to batch.
- Appearance
- Colourless to pale yellow liquid
- Odour
- Amine-like, characteristic
- Solubility
- Alcohol, ether, benzene
- Function
- Coupling agent
- Grade
- Technical / dye
N,N-dimethylated para-toluidine
- Molecular formulaC9H13N
- Molecular weight135.21 g/mol
- IUPAC nameN,N,4-Trimethylaniline
- Functional groupsTertiary aromatic amine, methyl group (para)
- CAS number99-97-8
Technical product information
Standard specification for Chelora Dyes' technical grade N,N,4-Trimethylaniline. Custom-grade and bulk specifications are available on request.
| Chemical name | N,N,4-Trimethylaniline |
|---|---|
| Synonyms | DMPT, N,N-Dimethyl-p-toluidine, N,N-Dimethyl-4-methylaniline |
| CAS number | 99-97-8 |
| Molecular formula | C9H13N |
| Molecular weight | 135.21 g/mol |
| Assay (purity) | ≥ 99.0% |
| Appearance | Colourless to pale yellow liquid (darkens on exposure to air/light) |
| Boiling point | 210–212°C |
| Moisture content | ≤ 0.2% |
| Solubility | Practically insoluble in water; miscible with alcohol, ether and benzene |
| Packaging | 170–200 kg drums, IBC and bulk tanker on request |
| Shelf life | 18 months in sealed original packaging |
Applications of N,N,4-Trimethylaniline
Azo dye coupling component
A strongly activated coupling component used to build azo dye chromophores.
Dye & pigment chemistry
Feeds intermediates used across dye, pigment and specialty colourant manufacture.
Polymer & resin curing accelerator
Used as a redox accelerator to promote free-radical curing in composite and adhesive resin systems.
Dental & composite resin systems
Used as an activator in redox-cured acrylic and composite formulations.
Analytical reagents
Used as a reference reagent in analytical and laboratory-scale synthesis work.
Custom synthesis
Supplied to order for custom manufacturing and contract synthesis projects.
Why choose Chelora Dyes
Consistent purity
Assay controlled at ≥99.0% with moisture and colour verified before dispatch.
Full documentation
COA, SDS, and regulatory data supplied with every shipment.
Flexible volumes
From 25 kg bags to jumbo-bag bulk quantities.
Technical support
Process, and compliance guidance from our chemistry team.
Storage and guidelines
- Store in tightly sealed original drums, protected from light.
- Keep in a cool, well-ventilated area away from direct sunlight and heat.
- Segregate strictly from strong oxidising agents and acids.
- Protect from air exposure, which promotes discolouration.
- Use compatible containers: lined steel drums or HDPE containers.
- Re-seal drums promptly after use to preserve assay specification.
Handling precautions
N,N,4-Trimethylaniline is classified as toxic and a possible environmental hazard; skin contact, ingestion and inhalation should be strictly avoided.
Use adequate ventilation, vapour extraction where handled in volume, and full PPE including chemically resistant gloves, goggles and, where indicated by the risk assessment, respiratory protection during transfer and bulk handling operations.
Keep away from strong oxidisers, strong acids and sources of ignition.
Refer to the full Safety Data Sheet for exposure limits, spill containment, disposal, and first-aid measures before use.
Frequently asked questions
What is N,N,4-Trimethylaniline used for?
N,N,4-Trimethylaniline is used chiefly as a coupling component in azo dye synthesis and as a redox accelerator in polymer and composite resin curing systems.
Why is this amine such an effective coupling agent?
The fully N,N-dimethylated amine strongly activates the aromatic ring toward electrophilic attack, giving efficient, reproducible coupling behaviour in azo dye synthesis.
Is N,N,4-Trimethylaniline soluble in water?
It is practically insoluble in water but is miscible with organic solvents such as alcohol, ether and benzene.
What purity do you supply?
Standard technical grade is supplied at a minimum assay of 99%, with moisture held within tight limits. Higher assay grades can be manufactured to order.
What packaging sizes are available?
170–200 kg drums as standard, with IBC and bulk tanker supply available on request.
How should it be stored, and for how long?
In sealed original drums, protected from light, in a cool, ventilated store away from strong oxidisers and acids. Shelf life is 18 months from manufacture when storage conditions are maintained.
Is it hazardous to handle?
It is classified as toxic and a suspected environmental hazard and must be handled strictly according to its Safety Data Sheet, with adequate ventilation and appropriate PPE.
Do you provide a Certificate of Analysis?
Yes. Each batch ships with a Certificate of Analysis and Safety Data Sheet covering assay, moisture and appearance.
