Overview
Diaminodiphenyl ether (CAS 101-80-4 ), commonly abbreviated as ODA and also known commercially as 4,4'-oxydianiline, is an aromatic diamine monomer used in the synthesis of high-performance polymers.
It functions as a reactive building block and curing agent in systems where thermal stability and mechanical durability are critical requirements. ODA is a primary monomer in the production of polyimide films and resins.
In these applications, it reacts with dianhydrides to deliver materials used in flexible electronics, aerospace components, and high-temperature insulation. In epoxy formulations, it acts as a curing agent to produce thermosets.
These materials feature elevated glass transition temperatures suited for structural composites and printed circuit board laminates. Polyurethane and polyurea systems incorporate ODA to introduce aromatic chain segments.
This improves rigidity and heat resistance in foam and coating applications. Specialty colorant and pigment manufacturers also use it as an intermediate in synthesizing azo dyes and pigments for printing inks.
Diaminodiphenyl ether is supplied as an off-white to light tan crystalline powder. Technical and high-purity grades are available, with purity specifications typically ranging from 98% to 99%+ for industrial use.
These specifications meet monomer-grade requirements for polyimide synthesis. Packaging is offered in kilogram-scale bags through to bulk quantities for industrial polymer producers and chemical manufacturers.
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Physical Properties
| Melting Point | 186-187 °C |
| Boiling Point | >300 °C |
| Density | 1.417 g/cm³ |
| Flash Point | 426 °F |
| Appearance | 4,40′-Oxydianiline is a white crystalline solid, or a beige powder. |
| Color | White |
| Form | Solid |
| Water Solubility | Insoluble. <0.01 g/100 mL at 15 ºC |
| Vapor Pressure | 10 mm Hg ( 240 °C) |
| Refractive Index | 1.6660 (estimate) |
| Log P | 0.72 at 20℃ |
Safety & Handling
Danger GHS06 GHS08 GHS09 GHS07 Hazard Statements H301 Toxic if swallowed H302 Harmful if swallowed H311 Toxic in contact with skin H317 May cause an allergic skin reaction H331 Toxic if inhaled H340 May cause genetic defects H341 Suspected of causing genetic defects H350 May cause cancer H351 Suspected of causing cancer H361 Suspected of damaging fertility or the unborn child H372 Causes damage to organs through prolonged or repeated exposure H373 May causes damage to organs through prolonged or repeated exposure H400 Very toxic to aquatic life H410 Very toxic to aquatic life with long lasting effects H411 Toxic to aquatic life with long lasting effects Precautionary Statements P203 Obtain, consult and follow expert instructions for use. P260 Do not breathe dust/fume/gas/mist/vapours/spray. P261 Avoid breathing dust/fume/gas/mist/vapours/spray. P262 Do not get in eyes, on skin, or on clothing. P264 Wash … thoroughly after handling. P270 Do not eat, drink or smoke when using this product. P271 Use only outdoors or in a well-ventilated area. P272 Contaminated work clothing should not be allowed out of the workplace. P273 Avoid release to the environment. P280 Wear protective gloves/protective clothing/eye protection/face protection. P316 Get emergency medical help immediately. P318 IF exposed or concerned, get medical advice. P319 Get medical advice/attention if you feel unwell. P321 Specific treatment (see … on this label). P330 Rinse mouth. P391 Collect spillage. P405 Store locked up. P501 Dispose of contents/container in accordance with local regulations. P301+P316 Get emergency medical help immediately. P301+P317 Get emergency medical help. P302+P352 IF ON SKIN: Wash with plenty of water. P304+P340 IF INHALED: Remove person to fresh air and keep comfortable for breathing. P333+P317 Get emergency medical help. P361+P364 Take off immediately all contaminated clothing and wash it before reuse. P362+P364 Take off contaminated clothing and wash it before reuse. P403+P233 Store in a well-ventilated place. Keep container tightly closed.
Trade & Regulatory
| HS Code | 29222900 |
| UN Number | 3077 |
| ADR Class | 9 |
| Packing Group | III |
| Storage Class | 6.1C - Combustible acute toxic Cat.3 toxic compounds or compounds which causing chronic effects |
| WGK (Germany) | 3 |
Other Names
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Chemical Properties
- CAS Number
- 101-80-4
- EC Number
- 202-977-0
- Mol. Weight
- 200.24
- HS Code
- 29222900
- Category
- Pigments & Colorants