FC-14.7-P
CIP Cleaner — Acidic
Ingredients
| Ingredient | INCI / Chemical Name | % w/w | Function |
|---|---|---|---|
| Water | Aqua | 72.0 | Solvent carrier |
| Phosphoric acid (75%) | Phosphoric acid | 15.0 | Acidulant, mineral-scale dissolution |
| Nitric acid (60%) | Nitric acid | 5.0 | Strong acid, silica-scale removal |
| C9-C11 alcohol ethoxylate (6 EO) | C9-11 pareth-6 | 3.0 | Nonionic surfactant, detergency |
| Phosphonate (PBTC) | 2-Phosphonobutane-1,2,4-tricarboxylic acid | 2.0 | Corrosion inhibitor, chelant |
| Benzotriazole | 1H-Benzotriazole | 0.5 | Copper alloy protection |
| Polyacrylic acid (Mw 2,000) | Polyacrylic acid | 2.0 | Dispersant, antiredeposition |
| Total | 100.0 |
Formulation Notes
Mineral deposits (calcium carbonate, calcium phosphate, magnesium hydroxide) accumulate on heating surfaces and pipework in CIP circuits, particularly in dairy and brewery operations where high-temperature processing promotes scale formation. An acidic CIP cleaner at pH 1-2 dissolves these deposits through acid-base neutralization and chelation. The formulation below uses phosphoric acid for general mineral-scale removal, supplemented by nitric acid for enhanced performance on silica-containing soils .
Procedure. Charge vessel with water and activate cooling jacket. Add phosphoric acid slowly, then nitric acid, maintaining temperature below 45°C at all times. Add PBTC and polyacrylic acid; dissolve completely. Add the alcohol ethoxylate. Dissolve benzotriazole in a small quantity of warm water and add to the batch.
Specifications. pH (neat): 1.5 ± 0.3; pH (0.5% solution): 2.0 ± 0.2; active matter: 15% ± 1%; acid content (as citric acid equivalent): 18% ± 1%.
Application. Use at 0.5-2.0% depending on scale severity. Circulate at 55-65°C for 10-15 minutes. Follow with a water rinse to conductivity baseline (< 50 µS/cm). For stainless-steel equipment, a passivation step may follow: circulate 1-2% nitric acid at ambient temperature for 20 minutes to restore the chromium oxide layer . Do not use on galvanized steel, aluminum, or unalloyed copper.
GHS Classification. Skin Corrosion Category 1A (H314); Signal word: DANGER; Corrosive to Metals Category 1 (H290). Required PPE: full acid-resistant suit, chemical-resistant gloves (butyl rubber), respiratory protection (acid-gas cartridge) if mist is generated, face shield, chemical-resistant boots. Store in acid-resistant containers; segregate from alkalis .