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Acid Black 2 Crystal
Acid Black 2 Crystal is a synthetic acid dye of the azo class, presented in crystalline form, known for its intense black coloration and excellent solubility in acidic aqueous solutions. This dye is primarily used for dyeing protein fibers such as wool, silk, and nylon, as well as leather and certain synthetic fibers under acidic conditions. Acid Black 2 Crystal provides deep, uniform black shades with good wash and light fastness properties, making it ideal for textile and leather applications. It is widely used in industrial dyeing processes, research formulations, and laboratory testing due to its chemical stability and high purity.
Acid Black 2 Crystal
Primary Uses
- Textile and Leather Processing
- Used extensively for dyeing wool, silk, nylon, and other protein fibers to achieve deep black coloration.
- Applied in leather tanning and dyeing processes to obtain consistent and durable black shades.
- Utilized in textile printing and finishing for producing high-quality black patterns.
- Employed in acid dye baths for uniform dye uptake on sensitive fabric substrates.
- Industrial Applications
- Used in manufacturing of colored filters, inks, and coatings requiring acid-stable black pigments.
- Incorporated in quality control processes and research formulations in textile industries.
- Applied as an analytical reagent in laboratory tests related to dyeing and fiber characterization.
Secondary Uses
- Cosmetic and Personal Care
- Occasionally used in acid-based hair dye formulations (subject to regulatory approval).
- Incorporated in external-use cosmetic products for black pigmentation where permitted.
- Scientific and Research
- Used in histology and microscopy staining to provide contrast in biological samples.
- Employed in educational and laboratory settings for demonstrations and dyeing experiments.
1. Basic Identification Attributes
- Botanical Source: Synthetic
- Common/Trade Name: Acid Black 2 Crystal
- INCI Name: Acid Black 2
- CAS Number: 1533-45-5
- HS Code: 3204.11
- Synonyms: Acid Black 2, Acid Black 2 Dye, CI Acid Black 2
2. Physical & Chemical Properties
- Physical State: Crystalline solid
- Color & Odor: Deep black; odorless
- Solubility: Highly soluble in water under acidic conditions
- Density: Approximately 1.5 g/cm³
- pH Stability: Stable within acidic pH range (1-4)
- Shelf Life: 24 months under proper storage conditions
3. Safety & Hazard Attributes
- GHS Classification: May cause skin and eye irritation
- Toxicity: Moderate toxicity if ingested; avoid dust inhalation
- Allergen Information: Possible allergen for sensitive individuals
- Exposure Limits: Follow occupational safety guidelines for dyes and powders
4. Storage & Handling Attributes
- Storage Conditions: Store in cool, dry, and well-ventilated areas away from strong oxidizers and sunlight
- Container Type: Sealed polyethylene or chemically resistant containers
- Shelf Life: 24 months if stored under recommended conditions
- Handling Precautions: Use proper PPE such as gloves, masks, and protective clothing to avoid dust exposure
5. Regulatory & Compliance Attributes
- Complies with industrial dye regulations; not approved for food or drug applications
- Limited use in cosmetics and personal care products requiring regulatory clearance
- Manufactured in GMP-compliant facilities for industrial and laboratory use
6. Environmental & Health Impact
- Biodegradability: Moderate; disposal should follow environmental regulations
- Ecotoxicity: Potentially toxic to aquatic organisms at high concentrations
- Bioaccumulation: Not expected under normal use conditions
Safety Handling Precautions
- PPE Required: Gloves, protective eyewear, and dust mask
- Handling Guidelines: Avoid dust generation and direct skin contact
First Aid Measures
- Inhalation: Move to fresh air; seek medical attention if symptoms persist
- Skin Contact: Wash affected areas thoroughly with soap and water
- Eye Contact: Rinse eyes immediately with plenty of water; seek medical advice if irritation continues
- Ingestion: Do not induce vomiting; seek immediate medical attention
Firefighting Measures
- Fire Hazards: Combustible under intense heat
- Extinguishing Media: Water spray, foam, or dry chemical extinguishers
- Special Precautions: Avoid inhalation of combustion fumes
- Hazardous Combustion Products: Carbon oxides, nitrogen oxides
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