Alizarin solution in ethanol

Alizarin Solution in Ethanol
Other Names: 1,2-Dihydroxyanthraquinone solution; Mordant Red 11 solution

CAS Numbers:

• Alizarin: 72-48-0

• Ethanol: 64-17-5

Sum Formula:

• Alizarin: C₁₄H₈O₄

• Ethanol: C₂H₆O

Molar Mass:

• Alizarin: 240.21 g/mol

• Ethanol: 46.07 g/mol

Appearance: Reddish to orange liquid (solution), depending on concentration

Description:
Alizarin solution in ethanol is a prepared solution of the anthraquinone dye alizarin dissolved in ethanol. It is commonly used in analytical chemistry, histology, and materials science for staining calcium compounds, as well as in pigment synthesis and textile dyeing. The ethanol acts as a solvent to enhance solubility and application on surfaces.

Chemical and Physical Properties

• Density: Depends on concentration; approximate range 0.8–0.9 g/cm³ (similar to ethanol)

• Boiling Point: Approx. 78.3°C (reflects ethanol solvent)

• Melting Point: Not applicable (solution)

• Solubility in Water: Poor (for alizarin); ethanol is miscible

• Solubility in Organic Solvents: Soluble in ethanol, acetone, and chloroform

• Odor: Characteristic alcoholic odor (from ethanol)

• Flammability: Flammable due to ethanol content

Applications

• Histological Staining: Used in microscopy for visualizing calcium in biological tissues.

• Analytical Chemistry: As a pH indicator and calcium complexing dye.

• Textiles and Pigments: Applied as a colorant for fibers and for synthesis of lakes and pigments.

• Surface Science: Used to detect or mark metal oxides and carbonate minerals.

Safety

Signal Word: Danger (due to ethanol component)

Hazard Statements:

• H225: Highly flammable liquid and vapor

• H319: Causes serious eye irritation

• H336: May cause drowsiness or dizziness

• EUH066: Repeated exposure may cause skin dryness or cracking

Precautionary Statements:

• P210: Keep away from heat, sparks, open flames, hot surfaces. No smoking.

• P233: Keep container tightly closed.

• P280: Wear protective gloves, clothing, and eye protection.

• P305+P351+P338: IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses if present and easy to do. Continue rinsing.

• P403+P235: Store in a well-ventilated place. Keep cool.

• P501: Dispose of contents/container in accordance with local regulations.

Handling and Storage

• Handling Precautions: Use only in well-ventilated areas. Avoid contact with eyes, skin, and clothing. Prevent vapor buildup. Keep away from ignition sources.

• Storage Conditions: Store in a tightly sealed container in a cool, dry, well-ventilated place, away from incompatible substances and ignition sources.