Detalhes essenciais
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Introdução do Produto
1. Basic Identification Information
| Parameter | English Specification/Value |
|---|---|
| IUPAC Name | Benzene-1,4-diamine (also: 1,4-Diaminobenzene) |
| Common Name(s) | p-Phenylenediamine (PPD); 1,4-Phenylenediamine; p-Diaminobenzene; C.I. 76060 (Color Index) |
| CAS Registry Number | 106-50-3 |
| EC/EINECS Number | 203-404-7 |
| Molecular Formula | C₆H₈N₂ |
| Molecular Weight | 108.14 g/mol |
| Chemical Class | Aromatic diamine; oxidative hair dye primary base; dye/polymer intermediate; photographic developer |
| Related Compound | 2-Nitrobenzene-1,4-diamine (p-NPPD, CAS 99-56-9) (nitro-substituted analog; coupler for deep brown/black shades with lower sensitization risk than PPD) |
2. Physicochemical Properties
| Property Category | Specific Parameter | Specification/Value |
|---|---|---|
| Structural Features | Functional Groups | Two primary amino groups (-NH₂) at C1/C4 positions of benzene ring (para-substitution; enables intramolecular hydrogen bonding and azo dye formation) |
| Physical Appearance | State & Color | White to pale purple crystalline powder; darkens to brown/black on exposure to air/light (oxidation); faint amine-like odor |
| Melting Point | 145–147 °C (lit.) | |
| Boiling Point | 267 °C (lit.; sublimes at atmospheric pressure; decomposes above 300 °C) | |
| Density (25 °C) | 1.20 g/cm³ (crystalline form) | |
| Solubility | Polar Solvents | Soluble in ethanol (1 g/2 mL), methanol, acetone, and dilute acids (forms diamine salts); moderately soluble in propylene glycol (1 g/15 mL) |
