Detalhes essenciais
Envio:快递, 空运, 陆运, 海运
Introdução do Produto
1. Basic Identification Information
| Parameter | English Specification/Value |
|---|---|
| IUPAC Name | 2-Methylbenzene-1,4-diamine sulfate (1:1) (also: 1,4-Benzenediamine, 2-methyl-, sulfate) |
| Common Name(s) | 2,5-Diaminotoluene Sulfate; Toluene-2,5-diamine Sulfate; PTDS; para-Toluenediamine Sulfate; C.I. 76043 |
| CAS Registry Number | 615-50-9 |
| EC/EINECS Number | 210-427-4 |
| Molecular Formula | C₇H₁₂N₂O₄S (or C₇H₁₀N₂·H₂SO₄) |
| Molecular Weight | 220.24 g/mol |
| Chemical Class | Aromatic diamine sulfate salt; oxidative hair dye primary base; dye intermediate |
| Related Compound | 2,5-Diaminotoluene (TDA, free base, CAS 95-70-5) (parent compound; higher oxidation risk; less stable in formulations) |
2. Physicochemical Properties
| Property Category | Specific Parameter | Specification/Value |
|---|---|---|
| Structural Features | Functional Groups | Two primary amino groups (-NH₂) at C1/C4 positions; methyl group (-CH₃) at C2; sulfate group (-OSO₃H) as counterion (protonates amino groups for stability) |
| Physical Appearance | State & Color | White to pale yellow crystalline powder; stable color (no darkening on exposure to air compared to free base); faint amine-like odor |
| Melting Point | >300 °C (decomposes without melting) | |
| Density (25 °C) | 1.48 g/cm³ (crystalline form) | |
| Solubility | Polar Solvents | Soluble in water (5.03 g/L at 20 °C); very soluble in dilute acids (forms more soluble salts); moderately soluble in ethanol (1–10 g/L) |
