Detalhes essenciais
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Introdução do Produto
1. Basic Identification Information
| Parameter | English Specification/Value |
|---|---|
| IUPAC Name | 2-Nitrobenzene-1,4-diamine (also: 4-Amino-2-nitroaniline) |
| Common Name(s) | p-Nitro-p-phenylenediamine (p-NPPD); 2-Nitro-1,4-phenylenediamine; 4-Amino-o-nitroaniline; C.I. 76070 (Color Index) |
| CAS Registry Number | 99-56-9 |
| EC/EINECS Number | 202-767-1 |
| Molecular Formula | C₆H₇N₃O₂ |
| Molecular Weight | 153.14 g/mol |
| Chemical Class | Nitroaromatic diamine; hair dye intermediate; oxidative color coupler; azo dye precursor |
| Related Compound | p-Phenylenediamine (PPD) (CAS 106-50-3) - lacks the 2-nitro group; primary hair dye base with higher sensitization risk |
2. Physicochemical Properties
| Property Category | Specific Parameter | Specification/Value |
|---|---|---|
| Structural Features | Functional Groups | Two amino groups (-NH₂) at C1/C4; nitro group (-NO₂) at C2 on benzene ring; electron-withdrawing nitro group modulates dye reactivity |
| Physical Appearance | State & Color | Red to reddish-brown crystalline powder; faint aromatic/amine-like odor |
| Melting Point | 140–143 °C (lit.; decomposes slightly above melting point) | |
| Boiling Point | Decomposes before reaching boiling temperature (decomposes >200 °C, releasing toxic nitrogen oxides) | |
| Density (25 °C) | 1.44 g/cm³ (crystalline form) | |
| Solubility | Polar Solvents | Soluble in ethanol (1 g/10 mL), methanol, acetone, and dilute acids (forms diamine salts); moderately soluble in propylene glycol (1 g/20 mL) |
