ISOPROPYL ALCOHOL (IPA) is widely accepted as a good liquid for keeping cleanroom surfaces in pristine condition. At room temperature, methyl alcohol has three times the vapor pressure than that of IPA. This means methyl alcohol will evaporate at a much more rapid pace, making it difficult to keep wipers damp enough to efficiently remove surface particles. In addition, the higher vapor pressure of methyl alcohol means more of the alcohol will be in the vapor state, which means increased exposure to stringent alcohol fumes for cleanroom operators.
The main test done with Alcohol and IPA is as follows.
- Purity DIN 55685
- Water ASTM D1364
- Appearance Clear & Free from Suspended Matter ASTM D4176
- Color ASTM D1209
- Initial diluted odor SMS 547
- Density ASTM D4052
- Refractive Index ASTM D1218
- Acidity as Acetic acid ASTM D1613
- Non Volatile Matter ASTM D1353
- Distillation ASTM D1078
- Benzene LPM 5230
- Water Miscibility ASTM D1722