Essential details
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Product Introduction
1. Basic Identification Information
| Parameter | English Specification/Value |
|---|---|
| IUPAC Name | Benzene-1,3-diol (also: 1,3-Dihydroxybenzene) |
| Common Name(s) | Resorcinol; m-Dihydroxybenzene; Resorcin; 1,3-Benzenediol; C.I. 76505 (Color Index) |
| CAS Registry Number | 108-46-3 |
| EC/EINECS Number | 203-585-2 |
| Molecular Formula | C₆H₆O₂ |
| Molecular Weight | 110.11 g/mol |
| Chemical Class | Dihydroxybenzene derivative; oxidative hair dye coupler; keratolytic agent; antiseptic; dye intermediate |
| Related Compound | Hydroquinone (p-Dihydroxybenzene, CAS 123-31-9) (para-substituted analog; skin-lightening agent with higher toxicity; banned in some cosmetic markets) |
2. Physicochemical Properties
| Property Category | Specific Parameter | Specification/Value |
|---|---|---|
| Structural Features | Functional Groups | Two hydroxyl groups (-OH) at C1/C3 positions of benzene ring (meta-substitution; enables hydrogen bonding and coupling with dye bases) |
| Physical Appearance | State & Color | White to pale pink crystalline powder; turns red/brown on exposure to air/light (oxidation); faint phenolic odor |
| Melting Point | 110–111 °C (lit.) | |
| Boiling Point | 277 °C (lit.; sublimes at atmospheric pressure; decomposes above 300 °C) | |
| Density (25 °C) | 1.28 g/cm³ (crystalline form) |
