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| Customization: | Available |
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| CAS No.: | 99-56-9 |
| Formula: | C6h7n3o2 |
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| Item | Specifications |
| Appearance | Typically dark red, reddish-brown, or purple crystalline needles or powder. |
| Purity | 98% Min |
| Moisture | 0.5% Max |
| Ash | 0.5% Max |
| Iron | 50PPM Max |
1. Chemical Identifiers
Systematic Name: 4-Nitro-1,2-benzenediamine
Common Names:
4-Nitro-o-phenylenediamine
1,2-Diamino-4-nitrobenzene
CI 76020 (Colour Index number)
CAS Number: 99-56-9
EC Number: 202-765-8
Molecular Weight: 153.14 g/mol
2. Composition and Structure
Description: An aromatic amine compound consisting of a benzene ring with two adjacent amino groups at positions 1 and 2 (ortho to each other) and a nitro group at position 4.
Key Feature: The presence of the ortho-diamine structure and a nitro group makes it a versatile intermediate for the synthesis of heterocyclic compounds (e.g., benzimidazoles, phenazines). Its intrinsic color is also influenced by the nitro group.
3. Physical Properties
Appearance: Typically dark red, reddish-brown, or purple crystalline needles or powder.
Melting Point: ~199 - 203 °C (decomposes)
Solubility: Slightly soluble in water. More soluble in hot water and polar organic solvents such as ethanol, acetone, and dimethylformamide (DMF).
Dye and Pigment Intermediate (Major Use): A key building block for synthesizing a wide range of complex dyes and organic pigments, particularly azo dyes and heterocyclic dyes (e.g., benzimidazole-based). These dyes produce colors in the red, violet, brown, and black ranges for textiles, leather, plastics, and inks.
Chemical Intermediate: Used in organic synthesis to produce:
Benzimidazole derivatives: Important in pharmaceuticals and agrochemicals.
Corrosion Inhibitors
Photographic Chemicals
Research Reagent: Used in analytical chemistry and laboratory synthesis.
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