Overview
2,4-Dichloroaniline (CAS 554-00-7 ), commonly referred to as 2,4-DCA, is an aromatic amine intermediate used across dye, agrochemical, and polymer manufacturing.
It functions primarily as a building block for synthesizing pigments, biocides, and curing agents rather than as a finished product in its own right. In textile and leather processing, it serves as a precursor.
This chemical is essential for azo dyes and pigments that provide colorfast performance on fiber and hide substrates. Polymer formulators use it as a curing agent and cross-linker for polyurethane and epoxy systems.
Controlled chain extension is critical to final mechanical properties in these industrial applications. In agrochemical production, it is an established intermediate in the synthesis of herbicides and fungicides.
This makes it a primary procurement target for active ingredient manufacturers globally. Personal care and cosmetic manufacturers source it for the production of hair dye intermediates for consistent chemistry.
Its reactivity profile enables reliable oxidative coupling chemistry in various formulations. The material is supplied as a solid at ambient temperature, typically in flake or crystalline form for easy handling.
Technical grade is the standard commercial specification, with purity levels commonly at 99% or higher. Packaging options generally include fiber drums and intermediate bulk containers suited to industrial volumes.
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Physical Properties
| Melting Point | 63-64 °C |
| Boiling Point | 245 °C @ Press: 760 Torr |
| Density | 1.567 g/cm³ @ Temp: 20 °C |
| Flash Point | 115°C |
| Appearance | pale grey or beige-brown to red-brown crystalline |
| Color | White to beige |
| Form | Crystalline Powder |
| Water Solubility | Insoluble, <0.1 g/100 mL at 23 ºC |
| Vapor Pressure | 1hPa at 78℃ |
| Refractive Index | 1.6000 (estimate) |
| Log P | 2.78 at 20℃ |
Safety & Handling
Danger GHS06 GHS08 GHS09 GHS07 GHS05 Hazard Statements H301 Toxic if swallowed H302 Harmful if swallowed H311 Toxic in contact with skin H317 May cause an allergic skin reaction H318 Causes serious eye damage H331 Toxic if inhaled H370 Causes damage to organs 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 Precautionary Statements 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. P317 Get emergency medical help. 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. P264+P265 Wash … thoroughly after handling. 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. P308+P316 Get emergency medical help immediately. 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. P305+P354+P338 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.
Trade & Regulatory
| HS Code | 29214210 |
| UN Number | 3442 |
| ADR Class | 6.1 |
| Packing Group | II |
| Storage Class | 6.1A - Combustible acute toxic Cat. 1 and 2 very toxic hazardous materials |
| WGK (Germany) | 3 |
Other Names
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Chemical Properties
- CAS Number
- 554-00-7
- EC Number
- 209-057-8
- Mol. Weight
- 162.01
- HS Code
- 29214210
- Category
- Pigments & Colorants