Formulation Card
FC-10.4-M
Glass Cleaner
Ingredients
| Component | % w/w | Function |
|---|---|---|
| Deionized water | 92.55 | Carrier (conductivity < 10 μS/cm) |
| Isopropanol (IPA, 99%) | 5.0 | Primary volatile solvent, degreaser |
| Ammonium hydroxide (28% NH) | 0.25 | Alkaline builder (100% volatile) |
| C8-C14 alkyl polyglucoside (APG, 50%) | 0.10 | Wetting agent |
| Sodium gluconate | 0.05 | Chelating agent |
| Fragrance | 0.05 | Odor masking |
| Total | 100.0 |
Addition Order & Process
Procedure: Add IPA to deionized water with stirring (flammable; ensure ventilation). Add APG and sodium gluconate. Add ammonium hydroxide last. Filter through 10 μm.
Formulation Notes
The classic formulation combines isopropanol (IPA) as volatile solvent, ammonium hydroxide as alkaline builder, and trace surfactant for wetting. IPA forms a minimum-boiling azeotrope with water (87.9% IPA / 12.1% water, bp 80.3°C) that accelerates evaporation.
Formulation FC-10.4-M — Glass Cleaner (Liquid)
Specification: pH 10.5 ± 0.3; surface tension 28 ± 2 mN/m; evaporation time < 30 seconds (500 μL on 10 × 10 cm glass, 23°C, 50% RH). The surfactant level of 0.05% active is deliberately minimal—sufficient for wetting, yet low enough that crystalline residue stays below the visible threshold of ~50 ng/mm² on glass.