Formulation Card
FC-9.4-M
Basin/ceramic cleaner
mediumSource: Chapter 9 §9.2.3
Ingredients
| Ingredient | % w/w | Function |
|---|---|---|
| Organic acid blend (citric : lactic, 2:1) | 4.0–6.0 | Mild acid system |
| SLES (28%) | 3.0–5.0 | Surfactant |
| APG (50%) | 2.0–3.0 | Co-surfactant, mildness |
| Precipitated calcium carbonate | 2.0–3.0 | Mild abrasive, polishing |
| Benzotriazole (BTA) | 0.05 | Corrosion inhibitor |
| Deionized water | to 100 | Carrier |
| Fragrance | 0.2–0.4 | Sensory |
Addition Order & Process
Procedure: Dissolve acids in water. Add surfactants sequentially. Suspend precipitated calcium carbonate with moderate shear; avoid over-milling which would reduce abrasive efficacy. Add BTA and remaining components.
Formulation Notes
Target parameters: pH 3.0–5.0; viscosity 50–200 cP; median abrasive particle size 5–15 m (Malvern laser diffraction).
The organic acid blend provides dual-action descaling: citric acid chelates calcium ions while lactic acid () supplies supplemental proton activity. The fine calcium carbonate abrasive (5–15 m) polishes ceramic glazes without scratching; this particle size is below the visual scratch threshold for porcelain (>25 m). Safe for vitreous china, glazed ceramic, and enamel; not for unsealed natural stone or brushed stainless steel where the abrasive would cause dulling.