# What are coloring agents used in pharmaceutical formulations?

Definition: coloring agents (or) colorants are a substance that is added (or) applied in order to change the color of a material (or) surface. Also enhancing the appearance.

## Types of coloring agents used in pharmaceutical formulation

1. Organic dyes and their lakes: Dyes are synthetic, chemical compounds that exhibit their coloring power, when dissolved in a solvent. Eg: Erythrosine, Tartrazine, patent blue V, etc.

Lakes are defined by the FDA as the aluminum salts of FD & C water-soluble

2. Inorganic (or) Mineral colors: Stability towards light is an important characteristic of this mineral, some of which have a useful pacifying capacity.

Eg: Titanium dioxide

3. Natural colors (or) Vegetable and animal colors: They are available naturally, and not stable to light as the other group of colors. From these natural colors, the main advantage is wide acceptability.

Eg: Caramel, Curcumin, etc.

### Uses of coloring agents used in pharmaceutical formulation

• Used to improve the appearance of the pharmaceutical dosage form.
• Maintain variants for the same batch product.
• Replace color when processing it may lose.
• Make different colors for the uncolored product.
Also read: What is Aerosol, Aerosol container with diagram