Tincture

Definition

A tincture is an alcohol-based solution used to extract and preserve the active components of various substances, including antimicrobial agents. It is commonly used for its disinfectant properties in microbiology.

5 Must Know Facts For Your Next Test

1. Tinctures are typically made with ethanol or isopropanol as the solvent.
2. They are effective against a wide range of microorganisms, including bacteria, fungi, and viruses.
3. The alcohol content in tinctures helps denature proteins and disrupts cell membranes of microbes.
4. Tinctures can be used on skin and surfaces but may cause irritation if applied to sensitive areas.
5. Common examples include iodine tincture and tincture of benzoin which are used for antiseptic purposes.

Review Questions

• What type of solvent is commonly used in tinctures?
• How do tinctures exert their antimicrobial effects?
• Name two common types of tinctures and their uses.

Related terms

Antiseptic:

A substance that prevents or inhibits the growth of microorganisms on living tissue.

Disinfectant: A chemical agent used to destroy or inhibit the growth of harmful organisms on inanimate objects and surfaces.

Iodine Tincture: An antiseptic solution containing iodine dissolved in alcohol, used for disinfecting wounds.