Isopropyl alcohol and isopropanol are the same chemical substance with no difference in composition; they are two names for 2-propanol (CAS 67-63-0) used interchangeably in industry.
The Chemistry
In terms of chemical structure and purity, both refer to the same molecule C₃H₈O. Industrial products are typically classified as 70%, 99%, or anhydrous isopropanol (≥99.9%). The anhydrous grade contains water content below 0.1%, which is critical for electronics and precision cleaning applications.
| Property | Value |
|---|---|
| Chemical Formula | C3H8O |
| Molecular Weight | 60.1 g/mol |
| Boiling Point | ~82.5°C |
| Solubility | Miscible with water |
Industrial Uses
From an industrial application perspective, both terms refer to the same solvent used in coatings, pharmaceuticals, and electronics manufacturing. However, application requirements differ: for example, semiconductor cleaning typically requires ≥99.9% anhydrous IPA, while general degreasing and surface cleaning may use 70–99% solutions, depending on evaporation rate and safety requirements.
Toxicity and Safety
In terms of safety and handling, isopropanol has a flash point of approximately 11.7°C, making it a highly flammable liquid under ambient conditions (GHS Category 2). Therefore, both "isopropyl alcohol" and "isopropanol" follow the same safety classification, meaning storage, transport, and handling requirements are identical regardless of naming convention.
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