Alizarin Extra Pure

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SHORT DESCRIPTION

Alizarin Extra Pure is a high-grade anthraquinone-based dye, presented as a reddish-brown crystalline powder, renowned for its vivid coloration and strong affinity for metal ions. It is primarily used in analytical chemistry as a complexometric indicator, especially for detecting aluminum, calcium, and other metal ions through color change. Due to its exceptional purity, it is also employed in histological staining, textile research, and pigment synthesis where precision and consistency are critical. Alizarin Extra Pure offers excellent stability and intense coloration, making it ideal for scientific, educational, and specialized industrial applications. Proper storage in a cool, dry environment is essential to maintain its effectiveness and prevent degradation.

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Category: LABORATORY CHEMICALS Tags: AzoDyeDerivative, ChemicalStaining, ColorimetricAnalysis, ComplexometricTitration, ExtraPureDye, MetalIonDetection, PHIndicator, SpectroscopyReagent

Description

USES

Table of Contents

Primary Uses

Analytical Reagent
- Used in complexometric titrations as a metal ion indicator, especially for calcium and magnesium.
Histological & Biological Staining
- Commonly used to stain calcium deposits in tissues, especially in bone and cartilage (Alizarin Red S staining).
pH Indicator in Chemistry
- Exhibits color change depending on pH, useful in analytical or educational demonstrations.
Dye in Thin Layer Chromatography (TLC)
- Acts as a visualization agent for certain metal-containing compounds.
Material Science & Mineral Analysis
- Used to identify and visualize mineralization patterns, especially calcium-containing compounds.

Secondary Uses

Educational Chemistry Experiments
- Demonstrates coordination chemistry and complex formation with metal ions.
Textile Dye Research
- Historical and modern research into natural dye performance, stability, and interactions with fabrics.
Art Conservation & Pigment Analysis
- Used in studies of historical paintings and pigment composition due to its legacy as a natural dye.
Inorganic Chemistry Demonstrations
- Forms visibly distinct complexes with certain metal ions, ideal for teaching coordination chemistry.
Biomineralization Studies
- Helps assess calcification in in-vitro cell cultures and tissue engineering research.

KEY PRODUCT FEATURES

KEY ATTRIBUTES

1. Basic Identification Attributes

Chemical Name: Alizarin (IUPAC: 1,2-Dihydroxyanthracene-9,10-dione)
CAS Number: 72-48-0
HS Code: 32041200 (Synthetic organic coloring matter and preparations based thereon)
Molecular Formula: C₁₄H₈O₄
Synonyms:
- Mordant Red 11
- 1,2-Dihydroxyanthraquinone
- Alizarine
- C.I. 58005

2. Physical & Chemical Properties

Physical State: Solid (powder or crystalline)
Color & Odor: Orange to red crystalline powder; odorless
Boiling Point: Decomposes before boiling
Melting Point: ~277°C (decomposes)
Density/Specific Gravity: ~1.56 g/cm³
Solubility:
- Water: Slightly soluble (better in hot water)
- Organic Solvents: Soluble in ethanol, acetone, and alkaline solutions (forms salts)
pH Level: ~4–5 in aqueous suspension
Vapor Pressure & Volatility: Negligible vapor pressure; non-volatile
Flash Point: Not flammable under normal conditions
Autoignition Temperature: Not applicable
Viscosity: Not applicable (solid)

3. Safety & Hazard Attributes

Hazard Class (GHS):
- Not classified as hazardous under normal conditions
- May cause mild skin/eye/respiratory irritation
NFPA Ratings:
- Health: 1
- Flammability: 1
- Reactivity: 0
Exposure Limits:
- No OSHA PEL or ACGIH TLV established
Reactivity:
- Stable under normal conditions
- Incompatible with strong oxidizing agents

4. Storage & Handling Attributes

Storage Conditions:
- Store in a tightly sealed container in a cool, dry, well-ventilated place
- Avoid exposure to light and moisture
Incompatible Materials:
- Strong oxidizers (e.g., nitric acid, hydrogen peroxide)
Container Type:
- Glass or chemical-resistant plastic containers
Shelf Life & Expiration Date:
- Stable for 3–5 years under ideal storage conditions
Special Handling Requirements:
- Avoid inhaling dust; use personal protective equipment (PPE)
- Use in a ventilated area or fume hood

5. Regulatory & Compliance Attributes

Regulatory Status:
- Listed in TSCA, REACH
- Used in research, dyes, and historical art restoration
Hazard Symbols (GHS Pictograms):
- Not required unless in bulk industrial concentrations
Transportation Restrictions:
- Not classified as hazardous for transport
- No UN number assigned
Waste Disposal Method:
- Dispose of in accordance with local environmental regulations
- Incineration or hazardous waste landfill depending on use context

6. Environmental & Health Impact

Ecotoxicity:
- Limited data; not known to be highly toxic to aquatic life in low concentrations
Persistence in Environment:
- Moderately persistent; limited biodegradability
Carcinogenicity/Mutagenicity:
- Not classified as carcinogenic by IARC, NTP, or OSHA
Biodegradability:
- Slowly biodegradable; may accumulate in sediment in large quantities

SAFETY HANDLING PRECAUTIONS

SAFETY PRECAUTIONS

Personal Protective Equipment (PPE):
- Wear chemical-resistant gloves, safety goggles, lab coat, and a dust mask or respirator if dust is present.
Handling:
- Handle with care to avoid generating dust.
- Use in a well-ventilated area or under a fume hood.
- Avoid inhalation, ingestion, or contact with skin and eyes.
Storage:
- Store in a tightly sealed container in a cool, dry, well-ventilated place.
- Protect from light and moisture.
- Keep away from strong oxidizing agents.
Hygiene Measures:
- Wash hands and face thoroughly after handling.
- Do not eat, drink, or smoke during use.
- Change contaminated clothing immediately.

FIRST AID MEASURES

Inhalation:
- Move to fresh air immediately.
- Keep at rest in a position comfortable for breathing.
- Seek medical attention if symptoms like coughing or breathing difficulty appear.
Skin Contact:
- Wash skin thoroughly with soap and water.
- Remove any contaminated clothing.
- Seek medical advice if irritation develops.
Eye Contact:
- Rinse immediately with plenty of water for at least 15 minutes.
- Lift eyelids occasionally during rinsing.
- Seek medical attention if redness or pain persists.
Ingestion:
- Rinse mouth with water.
- Do not induce vomiting.
- Seek immediate medical attention, especially if large quantities are ingested.

FIRE FIGHTING MEASURES

Suitable Extinguishing Media:
- Use dry chemical powder, foam, carbon dioxide (CO₂), or water spray.
Specific Hazards:
- May emit toxic fumes under fire conditions, such as carbon monoxide (CO) and carbon dioxide (CO₂).
- Powdered form may pose a dust explosion risk in confined environments.
Protective Equipment for Firefighters:
- Wear full firefighting gear and self-contained breathing apparatus (SCBA).
Firefighting Instructions:
- Cool fire-exposed containers with water spray.
- Avoid inhalation of fumes and keep upwind.
- Contain runoff to prevent contamination of water sources.