Overview
Solvent Black 5, commonly referred to as Alcohol Black, is a synthetic dye belonging to the azo dye class. It is widely utilized in industrial applications due to its excellent solubility in organic solvents and high tinting strength. The dye is primarily used in the production of inks, plastics, and textiles, where a deep black color is required. First synthesized in the mid-20th century, Solvent Black 5 has become a staple in various manufacturing processes. Its ability to dissolve in solvents like ethanol and acetone makes it particularly useful in formulations where water-based dyes are unsuitable. The dye is known for its stability and resistance to fading, making it a preferred choice for long-lasting applications.
Physical and Chemical Properties
Solvent Black 5 appears as a dark black powder or granules with a molecular weight of 474.47 g/mol. Its molecular formula, C28H18N4O4, reflects its complex structure, which contributes to its strong coloration properties. The dye is soluble in a range of organic solvents, including ethanol, acetone, and toluene, but it is insoluble in water. Key physical properties include a density of approximately 1.2 g/cm³ and excellent lightfastness, which ensures the color remains vibrant under prolonged exposure to light. The dye's high tinting strength allows for efficient use in small quantities, making it cost-effective for large-scale industrial applications.
Main Applications
Solvent Black 5 is predominantly used in the ink industry, where it serves as a key component in printing inks, especially for flexographic and gravure printing. Its solubility in organic solvents ensures smooth application and consistent color output. Additionally, the dye is employed in the coloring of plastics, providing a deep black hue to products such as packaging materials and automotive parts. In the textile industry, Solvent Black 5 is used for dyeing synthetic fibers, including polyester and nylon. Its resistance to fading and washing makes it ideal for fabrics that require durable coloration. The dye is also utilized in coatings and paints, where its stability and intense color are highly valued.
Safety and Storage
While Solvent Black 5 is generally safe for industrial use, proper handling procedures must be followed to minimize risks. Workers should avoid inhalation of dust and direct skin contact by using appropriate personal protective equipment (PPE), such as gloves and masks. The dye should be stored in a cool, dry place, away from direct sunlight and moisture, to maintain its stability and prevent degradation. In case of accidental exposure, affected areas should be rinsed thoroughly with water, and medical advice should be sought if irritation persists. Proper ventilation is essential in areas where the dye is handled to reduce the risk of airborne particles. Disposal should comply with local environmental regulations to prevent contamination.
B2B Procurement Guide
When procuring Solvent Black 5, B2B buyers should prioritize suppliers with verified certifications, such as ISO or REACH compliance, to ensure product quality and safety. It is essential to confirm the CAS number (11099-03-9) and request detailed specifications, including purity levels and solubility characteristics. Bulk purchases typically offer cost advantages, with prices ranging approximately $20-$50 per kilogram, depending on quantity and purity. Buyers should also consider logistics and storage requirements, as the dye must be kept in optimal conditions to preserve its properties. Establishing long-term relationships with reputable suppliers can ensure consistent quality and reliable delivery schedules.
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