1. Product Introduction & Main Application
Arnico’s Aniline is a colorless to pale yellow, oily liquid with a characteristic fishy odor, produced from the catalytic hydrogenation of nitrobenzene. This basic aromatic amine is the primary and strategic raw material for the production of Methylene Diphenyl Diisocyanate (MDI), the key raw material for polyurethane foams, and is also used in the synthesis of textile dyes, synthetic rubbers, and pharmaceutical intermediates.
2. Technical Specifications
| Technical Parameter | Standard MDI Grade | High Purity Grade | Unit |
|---|---|---|---|
| Purity | ≥ 99.5 | ≥ 99.9 | % |
| Nitrobenzene | ≤ 10 | ≤ 5 | ppm |
| Water | ≤ 0.1 | ≤ 0.05 | % |
| Color (APHA) | ≤ 50 | ≤ 20 | Pt-Co |
| Boiling Point | 184 – 186 | 184 – 185 | °C |
| Density (20°C) | 1.021 – 1.023 | 1.021 – 1.023 | g/cm³ |
3. Features & Benefits
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The Main MDI Precursor: Reacts with formaldehyde to produce MDA, which is then phosgenated to MDI at the highest yield.
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Guaranteed Purity for Synthesis: Free from nitrobenzene, which causes contamination and color in downstream reactions.
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Multiple Reactivity: The active amine group is capable of diazotization (for azo dye production), alkylation, and acylation.
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Stability Against Oxidation: High-purity grades are stabilized with antioxidants to prevent color change.
4. Industrial Applications
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Polyurethane Industry: Over 85% of the world’s aniline is used as the raw material for MDI production.
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Dye & Textile Industry: The synthesis of azo pigments, indigo, and dyeing intermediates.
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Rubber Industry: The production of sulfur-curing accelerators (MBT, MBTS).
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Pharmaceutical & Chemical Industry: The synthesis of paracetamol and herbicides.
5. Safety & Handling
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MSDS (Material Safety Data Sheet): This substance is highly toxic! It is absorbed through the skin and causes methemoglobinemia (blood poisoning). The Arnico MSDS is vital for safe handling.
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Storage Conditions: Store in stainless steel or carbon steel tanks, under a nitrogen blanket, in a cool, dark environment, away from acids and oxidizers.
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Personal Protective Equipment (PPE): Full solvent-resistant clothing (Tychem), Viton gloves, a respirator with an A-type filter, and an emergency shower are required.
6. Quality Assurance & COA
Arnico Aniline shipments are accompanied by a Certificate of Analysis (COA) detailing the GC purity and nitrobenzene content.
