The Nalco 77225 Safety Data Sheet (SDS) describes a powerful, highly alkaline boiler water treatment designed for industrial scale control. Because it is a concentrated chemical mixture containing Potassium Hydroxide, the SDS highlights significant safety risks, including severe skin burns and eye damage.
Below is a review of the key safety and technical specifications based on the latest available documentation (updated as of late 2018/early 2019 versions). ⚠️ Hazard Overview & Safety
The product is classified under the Globally Harmonized System (GHS) with the following primary hazards:
Corrosive to Metals: Category 1 (may be corrosive to aluminum, copper, and zinc). Acute Toxicity (Oral): Category 4 (harmful if swallowed). Skin Corrosion: Category 1A (causes severe skin burns).
Serious Eye Damage: Category 1 (causes irreversible eye damage). Required Personal Protective Equipment (PPE) Eyes: Safety goggles and a full-face shield are mandatory.
Skin: Standard chemical-resistant gloves (e.g., Nitrile) and protective clothing.
Respiratory: Use only with adequate ventilation; respirators may be needed if concentrations exceed exposure limits. 🧪 Chemical Composition & Properties nalco 77225 safety data sheet updated
Nalco 77225 is an internal boiler treatment that uses a combination of phosphate residuals and Transport Plus polymer technology. Concentration (%) Potassium Hydroxide 10 – 30% Tetrapotassium Pyrophosphate 10 – 30% Physical Data Appearance: Light yellow liquid with an ammoniacal odor. pH: >13 (highly alkaline). Density: 1.46 – 1.50 g/cm³ at 25°C. Solubility: Completely soluble in water. 🛠️ Operational Applications
Nalco 77225 is primarily used for scale control in boilers operating at pressures up to 40 barg.
Mechanism: Complex phosphates react with calcium and magnesium, while organic polymers transport these minerals through the boiler to prevent adherent deposits.
Compatibility: Safe for stainless steel, polyethylene, and PVC; avoid contact with copper, brass, and aluminum.
FDA Compliance: Complies with 21 CFR 173.310 for boiler water additives where steam may contact food. 📋 Best Practices
Storage: Keep in corrosive-resistant containers. Maximum storage temperature is 65°C (149°F) to avoid forming white precipitates. The Nalco 77225 Safety Data Sheet (SDS) describes
Dosing: Dosage depends on water quality and boiler pressure. Always consult a Nalco representative for exact requirements, as underfeeding leads to rapid scaling and corrosion.
SDS Requests: Formal Safety Data Sheets are typically provided upon purchase or can be requested through the Ecolab SDS Request Form.
If you need the full PDF for compliance records, I can help you find the specific regional emergency contact number or direct you to the Ecolab portal to request the official updated version. Which of those would be most helpful? Nalco 77225 SDS (GHS) | PDF | Toxicity - Scribd
3.1 Substance / Mixture This product is a mixture.
3.2 Chemical Characterization Aqueous solution of a catalyzed oxygen scavenger.
| Chemical Name | CAS Number | Percentage (Concentration) | | :--- | :--- | :--- | | Diethylhydroxylamine (DEHA) | 3710-84-7 | 15% - 30% | | Ethylenediaminetetraacetic Acid (EDTA) Tetrasodium Salt | 64-02-8 | 1% - 5% | | Water | 7732-18-5 | Balance | SECTION 3: COMPOSITION/INFORMATION ON INGREDIENTS 3
(Note: Specific percentage ranges are withheld as a trade secret. Exact composition may vary by region; refer to the specific SDS accompanying the shipment.)
While Nalco 77225 remains non-flammable, the updated sheet has reclassified its health hazards:
| Legacy Classification (Pre-2025) | Updated Classification (2026) | | --- | --- | | Skin Corrosion 1B | Skin Corrosion 1A (More severe) | | Eye Damage 1 | Eye Damage 1 (No change) | | Not classified for respiratory sensitization | Respiratory Sensitization 1 (New) |
New Hazard Statements:
New Precautionary Statements:
To ensure you have the genuine, legally valid updated sheet: