Isopropyl alcohol (IPA), also known as isopropanol or 2-propanol

1. Chemical Identity:
Isopropyl alcohol (IPA), also known as isopropanol or 2-propanol, is a colorless, flammable liquid with the chemical formula C₃H₈O (IUPAC name: *propan-2-ol*). It is the simplest example of a secondary alcohol, where the hydroxyl group (-OH) is attached to a carbon atom bonded to two other carbon atoms.

2. Key Properties:

Volatile liquid at room temperature.

Characteristic sharp, alcoholic scent (resembring acetone).

Miscible with water, ethanol, ether, and chloroform.

82.6℃ (180.7℃F).

Highly flammable (flash point: 11.7℃).

3. Production:
(derived from petroleum) using a catalyst. A common method involves reacting propylene with sulfuric acid followed by hydrolysis.

4. Major Applications:

A 70% IPA solution is widely used for sanitizing skin, surfaces, and medical equipment due to its rapid antimicrobial action.

Effective for oils, resins, gums, and synthetic fibers; used in pharmaceuticals, cosmetics, inks, and electronics cleaning.

Intermediate in manufacturing acetone, isopropyl acetate, and other chemicals.

Key ingredient in rubbing alcohol, antifreeze, windshield washer fluid, and cleaning agents.

5. Safety & Handling:

Can cause dizziness, nausea, or central nervous system depression if inhaled or ingested. Skin contact may cause irritation or dryness.

Requires storage away from sparks, heat, and open flames.

Use in well-ventilated areas; personal protective equipment (gloves, goggles) is recommended.

6. Distinguishing Feature:
(87.9% IPA), making it difficult to purify beyond this concentration by simple distillation.

Isopropyl alcohol is a versatile solvent and disinfectant with critical roles across healthcare, manufacturing, and consumer products. Its effectiveness, rapid evaporation, and low residue make it indispensable, though its flammability and toxicity necessitate careful handling.

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