Black 5
Black 5, also known as Acid Black 5 or CI 20470, is a synthetic dye commonly used in various industries for its deep, rich black to bluish-black color. It belongs to the azo dye family and is typically supplied as a fine powder or granules in industrial packaging, such as 25kg bags. Black 5 is water-soluble and exhibits excellent stability in acidic conditions, making it ideal for applications in textiles, personal care, and some food and pharmaceutical formulations where permitted.
This dye offers high tinctorial strength, consistent batch-to-batch quality, and compatibility with other dyes for custom blends. It is used both for its standalone dark color and to darken or tone other dye shades.
Black 5
Primary Uses
- Textile Industry
- Used extensively for dyeing wool, silk, nylon, and other protein fibers
- Commonly applied in yarn, garment dyeing, and piece dyeing processes
- Suitable for both exhaust and continuous dyeing systems
- Used in blends to achieve deep greys and jet blacks
- Cosmetics and Personal Care
- Used in hair color formulations and semi-permanent dyes
- Added to liquid soaps, shampoos, and lotions for decorative coloration
- Incorporated in eyeliners, mascaras, and other dark cosmetic products
- Pharmaceutical and Nutraceutical Applications
- Used as a colorant in capsules, tablets, and liquid medications for visual identification
- Cleaning and Detergent Products
- Added to toilet blocks, floor cleaners, and liquid detergents for aesthetic appeal
- Used in specialty soaps and industrial hand cleaners for coloration
- Paints and Coatings
- Incorporated into artist paints and decorative coatings
- Used in inks, craft paints, and coatings requiring deep black hues
Secondary Uses
- Food and Beverage
- Used in confectionery, icings, and beverages as a colorant
- Suitable for sauces, candies, and food decorations
- Art and Ink Products
- Used in inkjet inks, markers, and fountain pen inks
- Popular in calligraphy, printing inks, and stamping products
- Industrial Applications
- Used in leather dyeing, paper coloring, and synthetic fiber coloration
- Applied in adhesives and sealants requiring visual coloring
1. Basic Identification Attributes
- Common/Trade Name: Black 5
- CI Name: Acid Black 5
- CI Number: 20470
- INCI Name: CI 20470
- CAS Number: 1064-48-8
- Synonyms: Acid Black 5, Food Black 1, C.I. Acid Black 5, Black Food Dye
2. Physical & Chemical Properties
- Physical State: Powder or granules
- Color & Odor: Dark black to bluish-black; odorless
- Solubility: Soluble in water; insoluble in oils
- pH Range: Stable in acidic conditions
- Melting Point: Not applicable
- Shelf Life: 24–36 months under recommended storage
3. Safety & Hazard Attributes
- GHS Classification: May cause eye and skin irritation in concentrated form
- Toxicity: Generally low when used as directed
- Allergen Information: Not a known allergen
- Exposure Limits: Avoid inhalation of dust during bulk handling
4. Storage & Handling Attributes
- Storage Conditions: Store in a tightly sealed container, away from moisture and direct sunlight
- Container Type: 25kg HDPE bags or fiber drums with liners
- Shelf Life: 24–36 months in original packaging
- Handling Precautions: Use gloves and dust mask in manufacturing environments
5. Regulatory & Compliance Attributes
- Subject to approval for food, pharmaceutical, or cosmetic use depending on region
- Must meet appropriate specifications
- Verified for batch consistency and purity based on intended application
- Not approved for ingestion in all countries
6. Environmental & Health Impact
- Biodegradability: May be slow to degrade
- Ecotoxicity: May pose risk to aquatic life in high concentrations
- Bioaccumulation: Not expected
Safety Handling Precautions
- Use PPE in powder handling to prevent respiratory exposure
First Aid Measures
- Inhalation: Move to fresh air; seek medical attention if symptoms persist
- Skin Contact: Wash thoroughly with soap and water
- Eye Contact: Flush with plenty of water for 15 minutes
- Ingestion: Not intended for ingestion; seek medical advice immediately
Firefighting Measures
- Fire Hazards: Combustible as fine dust
- Extinguishing Media: Use dry chemical, foam, or CO₂
- Special Precautions: Avoid generating dust; use protective equipment
- Hazardous Combustion Products: May emit carbon oxides, nitrogen oxides, and sulfur compounds
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