Acid Black 210

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Acid Black 210 is a high-performance, metal-complex acid dye specifically engineered for deep black shades with exceptional wet fastness properties. This chromium-based dye belongs to the 1:2 metal complex dye class, offering superior molecular stability and fiber affinity. The powder formulation delivers consistent, vibrant coloration for synthetic polyamide fibers and protein-based textiles, with optimized characteristics for industrial dyeing processes. Its molecular structure features multiple sulfonic acid groups that ensure excellent water solubility and penetration, while the metal complex formation provides enhanced light and wash fastness compared to non-metalized acid dyes.

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Description

USES

Primary Uses

Textile Dyeing
- Wool & Silk: Provides deep, wash-fast black shades on protein-based fibers.
- Nylon & Polyamide: Used for dyeing synthetic fabrics with excellent color fastness.
- Leather Industry: Applied in leather dyeing for shoes, bags, and jackets.
Ink Manufacturing
- Used in printing inks for textiles, paper, and specialty applications.
- Suitable for inkjet and stamp pad inks due to good solubility.
Biological Staining (Limited Use)
- Occasionally used in microscopy for contrast enhancement.

Secondary Uses

Paper & Packaging
- Adds color to tissue paper, cardboard, and decorative packaging.
Cosmetics (Hair Dyes & Pigments)
- Found in semi-permanent hair dyes (subject to regulatory approval).
Wood & Furniture Staining
- Used for dark finishes in woodworking.

PRODUCT KEY FEATURES

1. Basic Identification Attributes

Chemical Name (IUPAC):
Disodium 4-[(2E)-2-(5-amino-4-methyl-2-sulfonatophenyl)diazenyl]-2-[(2E)-2-(4-[(2E)-2-(6-amino-1-hydroxy-3-sulfonato-2-naphthyl)diazenyl]-2-sulfonatophenyl)diazenyl]-5-methylbenzenesulfonate chromium(3+) complex
Common/Trade Names:
- Acid Black 210
- C.I. 15711
- Nylosan Black N-2RL (Clariant)
- Lanacron Black S-2G (Huntsman)
CAS Number: [12219-03-9]
HS Code: 3204.12.00 (Acid dyes)
Molecular Formula: C₃₄H₂₄CrN₇O₁₃S₃·2Na (typical structure)
Molecular Weight: ~950-1050 g/mol
Synonyms:
- Black 210
- Chromium complex acid black dye

2. Physical & Chemical Properties

Physical State: Fine dark grayish-black powder
Color & Odor: Black powder; odorless
Melting Point: Decomposes before melting (>300°C)
Boiling Point: Not applicable (decomposes)
Density: 1.4-1.6 g/cm³ (bulk density)
Solubility:
- Water: 50-80 g/L at 25°C
- Organic solvents: Insoluble (ethanol, acetone)
pH (1% solution): 6.0-7.5
Vapor Pressure: Negligible
Flash Point: Non-flammable (>200°C)
Autoignition Temperature: Not applicable
Viscosity: Not applicable (solid)

3. Safety & Hazard Attributes

Hazard Class (GHS):
- Skin Irritation (Category 2)
- Eye Irritation (Category 2A)
- STOT Single Exposure (Category 3, H335)
NFPA Ratings:
- Health: 2
- Flammability: 1
- Reactivity: 0
Exposure Limits:
- OSHA PEL: Not established
- ACGIH TLV: Not established (dust: 1 mg/m³ recommended)
Reactivity:
- Stable under normal conditions
- Incompatible with strong oxidizers (e.g., peroxides)

4. Storage & Handling Attributes

Storage Conditions:
- Cool, dry place (<30°C)
- Relative humidity <60%
- Away from direct sunlight
Incompatible Materials:
- Strong oxidizers (e.g., chlorates, nitrates)
- Strong acids/bases
Container Type:
- Sealed polyethylene or polypropylene containers
- Avoid metal containers (risk of corrosion)
Shelf Life: 36 months in original packaging
Special Handling:
- Use NIOSH N95 dust mask
- Nitrile gloves and safety goggles
- Local exhaust ventilation recommended

5. Regulatory & Compliance Attributes

Regulatory Status:
- EU: REACH registered
- US: EPA TSCA compliant
- China: IECSC listed
Hazard Symbols (GHS):
- Exclamation mark (irritant)
Transportation Restrictions:
- UN Number: Not regulated
- Shipping Name: "DYES, SOLID, N.O.S."
Waste Disposal:
- Incineration at licensed facilities
- Not RCRA hazardous (US)

6. Environmental & Health Impact

Ecotoxicity:
- LC50 (fish): >100 mg/L (96h)
- EC50 (daphnia): >10 mg/L (48h)
Persistence:
- Moderately persistent (half-life in water: 30-60 days)
Carcinogenicity:
- IARC: Not classified
- NTP: Not listed
- OSHA: Not carcinogenic
Biodegradability:
- 20-40% in 28 days (OECD 301B)

SAFETY HANDLING PRECAUTIONS

SAFETY HANDLING

Safety precautions

Personal Protective Equipment (PPE):

Respiratory: NIOSH-approved N95/P2 mask (powder) or organic vapor respirator (aerosols)
Eye/Face: Chemical goggles + face shield (bulk handling)
Gloves: Nitrile (4H rated) or neoprene (≥0.4mm thickness)
Body: Chemical-resistant apron + coveralls (Type 4/5/6)

Handling & Storage:
☑ Use local exhaust ventilation (LEV) or fume hood
☑ Ground containers to prevent static sparks
☑ Avoid dust generation (use wet methods or closed systems)
☑ Store in sealed, labeled containers away from oxidizers, acids, and metals
☑ Keep in cool, dry, well-ventilated area (≤30°C)

Hygiene Measures:
✖ No eating, drinking, or smoking in handling areas
✔ Wash hands/face thoroughly after use
✔ Emergency eyewash/shower must be accessible

2. First Aid Measures

Inhalation (Dust/Fumes):
➔ Move to fresh air immediately
➔ If breathing is difficult, give oxygen
➔ Seek medical attention if persistent cough/wheezing

Skin Contact:
➔ Remove contaminated clothing
➔ Wash with soap & water for ≥15 minutes
➔ Apply pH-neutral moisturizer
➔ Seek medical help if redness, burns, or irritation

Eye Contact:
➔ Rinse eyes for ≥20 minutes (use eyewash station)
➔ Hold eyelids open to ensure full flushing
➔ Immediate medical attention required

Ingestion:
➔ Do NOT induce vomiting
➔ Rinse mouth with water or milk (if conscious)
➔ Seek emergency medical care

3. Firefighting Measures

Fire Hazards:
🔥 Not highly flammable, but may decompose at high temps (≥200°C)
☠ Toxic fumes released when burning (SOₓ, NOₓ, HCN in some formulations)
💧 Avoid water jets (may spread contaminated water)