N,N-Diethyl Aniline
A high-purity tertiary aromatic amine supplied for dye manufacture, resin cure acceleration, and pharmaceutical intermediate synthesis.
What is N,N-Diethyl Aniline?
N,N-Diethyl Aniline — DEA — is a colourless to yellow-brown liquid with two ethyl groups on the nitrogen. It is a tertiary amine with no N–H remaining.
Fully alkylating the nitrogen pushes electron density strongly into the ring, which is exactly what triarylmethane and xanthene chromophores need. The same electron-rich nitrogen makes the molecule an effective accelerator for peroxide-initiated resin cure, and a useful acid scavenger in synthesis.
At Chelora Chemicals, DEA is distilled to high assay and low colour, with residual aniline and monoethylaniline held to specification, since partially alkylated material gives off-shade dye components and inconsistent cure behaviour.
- Appearance
- Colourless to yellow-brown liquid
- Odour
- Characteristic amine odour
- Solubility
- Practically insoluble in water; soluble in organic solvents
- Function
- Dye intermediate / accelerator / acid scavenger
- Grade
- Technical
Formula diagram
Benzene ring with a diethylamino group
- Molecular formulaC10H15N
- Molecular weight149.23 g/mol
- IUPAC nameN,N-Diethylaniline
- Functional groupsTertiary aromatic amine
- CAS number91-66-7
Technical product information
Standard specification for Chelora Chemicals' technical grade N,N-Diethyl Aniline. Custom-grade and bulk specifications are available on request.
| Chemical name | N,N-Diethyl Aniline |
|---|---|
| Synonyms | DEA, N,N-Diethylaniline, Diethylphenylamine |
| CAS number | 91-66-7 |
| Molecular formula | C10H15N |
| Molecular weight | 149.23 g/mol |
| Assay (purity) | ≥ 99.5% |
| Appearance | Clear, colourless to yellow-brown liquid |
| Density (20°C) | 0.930–0.940 g/cm³ |
| Boiling point | 216–217°C |
| Flash point | 85°C (closed cup) |
| Residual aniline | ≤ 0.2% |
| Water content | ≤ 0.2% |
| Packaging | 200 kg drums, 1000 kg IBC, ISO tank |
| Shelf life | 12 months in sealed original packaging |
Applications of N,N-Diethyl Aniline
Triarylmethane dyes
Condensed into basic dyes for paper, textile, and ink applications.
Xanthene & rhodamine dyes
Feeds bright, fluorescent dye chemistry for inks and tracers.
Resin cure accelerator
Accelerates peroxide decomposition in acrylic and polyester resin systems.
Pharmaceutical intermediates
Used as a building block and as an acid scavenger in synthesis.
Corrosion inhibitors
Applied in amine-based inhibitor and metal treatment manufacture.
Specialty chemicals
Used in photographic, UV curing, and specialty additive synthesis.
Why choose Chelora Chemicals
Every batch of N,N-Diethyl Aniline is manufactured, tested, and documented to a standard that formulators and process chemists can build on with confidence — from first sample to full production volume.
Consistent purity
Assay controlled at ≥99.5% with residual aniline, colour, and water verified before dispatch.
Full documentation
COA, SDS, and regulatory data supplied with every shipment.
Flexible volumes
From 200 kg drums to IBC and ISO tank quantities.
Technical support
Process, handling, and compliance guidance from our chemistry team.
Storage and guidelines
- 01Store in tightly sealed original containers under a dry, inert atmosphere where possible.
- 02Keep in a cool, dry, well-ventilated store away from direct sunlight and heat.
- 03Protect from air and light — tertiary aromatic amines darken on oxidation.
- 04Segregate rigorously from organic peroxides and strong oxidising agents.
- 05Use compatible containers: lined steel, stainless steel, or HDPE.
- 06Prevent any release to drains, surface water, or soil.
Handling precautions
DEA is toxic by inhalation, ingestion, and skin absorption. It is for industrial use by trained personnel only.
Aromatic amines are absorbed through intact skin and can affect the blood by forming methaemoglobin. Chemical-resistant gloves, coveralls, and eye protection are required.
Never store or mix directly with organic peroxides. The accelerating effect that makes this product useful in resin cure means direct contact with concentrated peroxide can be violent; the two are always added separately to the resin.
The product is combustible above its flash point of 85°C. Keep away from ignition sources and earth equipment during transfer.
Refer to the full Safety Data Sheet for exposure limits, incompatibilities, spill response, and first-aid measures before use.
Frequently asked questions
What is N,N-Diethyl Aniline used for?
Dye manufacture, particularly triarylmethane and xanthene chemistry; resin cure acceleration in peroxide-initiated systems; and pharmaceutical synthesis, where it also serves as an acid scavenger.
How does it differ from N,N-dimethylaniline?
Only in the alkyl groups: two ethyls rather than two methyls. Both are tertiary amines used in similar roles, but they give different shades in dye chemistry and different cure kinetics, and DMA is the more volatile of the two.
How does it work as a cure accelerator?
Tertiary aromatic amines react with organic peroxides to generate free radicals at room temperature, letting a resin cure without heating. This is the basis of self-curing acrylic and polyester systems.
Why must it never be mixed directly with peroxide?
The same reaction that gives controlled cure becomes violent when amine and concentrated peroxide meet neat. Both components are always added separately to the resin and stored apart.
Why is residual aniline specified?
Aniline and monoethylaniline are primary and secondary amines that react differently in dye synthesis, producing off-shade components, and they alter cure kinetics. Controlling them protects both applications.
Is it soluble in water?
Practically insoluble. It dissolves readily in alcohols, esters, ethers, and aromatic hydrocarbons, and is miscible with most resin systems.
Why does the liquid darken during storage?
Tertiary aromatic amines oxidise on contact with air and light. Nitrogen blanketing and cool, dark storage slow it considerably, and moderate colour usually does not affect assay.
What purity do you supply?
Standard technical grade is supplied at a minimum assay of 99.5% with residual aniline at or below 0.2% and water at or below 0.2%. Tighter specifications can be manufactured for cure-critical use.
What packaging sizes are available?
200 kg drums, 1000 kg IBCs, and ISO tanks for bulk supply. Samples are available for cure and shade trials.
Is DEA hazardous?
Yes. It is toxic by several routes, absorbed through skin, combustible above 85°C, and reacts vigorously with peroxides. Engineering controls, PPE, and segregation all apply.
Do you provide a Certificate of Analysis?
Yes. Every batch is dispatched with a Certificate of Analysis and Safety Data Sheet covering assay, residual aniline, density, colour, water content, and appearance.