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Nalco 77225 Safety Data Sheet Updated May 2026

The safety information for NALCO® 77225, an internal boiler feedwater treatment, emphasizes its corrosive nature and high alkalinity. Updated safety documentation for this product is typically managed through Ecolab’s SDS Search, as official Safety Data Sheets (SDS) are provided directly with product shipments. Critical Safety & Hazard Profile Classification: Corrosive mixture. Primary Hazards: H314: Causes severe skin burns and eye damage. H302: Harmful if swallowed. Physical: May be corrosive to metals. Signal Word: DANGER. Key Chemical Composition

The product is a liquid mixture with an alkaline pH. Key identified components include:

Tetrapotassium Pyrophosphate (CAS 7320-34-5): 10–30% concentration.

Potassium Hydroxide (CAS 1310-58-3): 10–30% concentration.

Technology: Utilizes Transport Plus polymer technology for scale control. Emergency Response & First Aid

Eye Contact: Rinse cautiously with water for several minutes. Remove contact lenses if possible and continue rinsing. Call a POISON CENTER or physician immediately.

Skin Contact: Immediately take off all contaminated clothing. Rinse skin with water or shower.

Inhalation: Remove person to fresh air and keep comfortable for breathing. Call a physician immediately.

Ingestion: Rinse mouth. Do NOT induce vomiting. Seek immediate medical attention. Handling and Storage

Personal Protective Equipment (PPE): Wear chemical-resistant gloves, protective clothing, and eye/face protection (goggles and face shield).

Storage: Keep only in the original container. Store in a cool, well-ventilated area.

Materials of Compatibility: Compatible with stainless steel, EPDM, Butyl Rubber, and Neoprene. Avoid PTFE for seals.

Incompatibilities: Avoid contact with aluminum, copper, or brass. Nalco 77225 SDS (GHS) | PDF | Toxicity - Scribd

NALCO® 77225 is an alkaline liquid chemical primarily used for internal boiler water treatment

to control scale through a combination of phosphate residual and polymer technology.

As of recent Safety Data Sheet (SDS) updates, this product is classified as a hazardous and corrosive mixture. Critical Safety Information Classification:

Corrosive to metals (Category 1); causes severe skin burns and eye damage (Category 1). Physical State: Light yellow liquid with an ammoniacal odor. Highly alkaline ( is greater than 13 Hazard Statements: May be corrosive to metals. Harmful if swallowed. Causes severe skin burns and eye damage. Harmful to aquatic life with long-lasting effects. Safe Handling & Storage Personal Protective Equipment (PPE): nalco 77225 safety data sheet updated

Wear chemical-resistant gloves, safety goggles or a face shield, and protective clothing. Materials to Avoid:

use with aluminum, copper, brass, zinc, or light alloys, as it is corrosive to these metals. It is compatible with stainless steel, polyethylene, and polypropylene. Store in original containers at temperatures below 65 raised to the composed with power cap C 149 raised to the composed with power cap F First Aid Measures Eye Contact:

Rinse cautiously with water for several minutes. Remove contact lenses if present and easy to do. Continue rinsing and call a physician immediately. Skin Contact:

Take off contaminated clothing immediately. Rinse skin with plenty of water/shower for at least 15 minutes. Ingestion:

induce vomiting. Rinse mouth and give water to drink if the person is conscious. Seek medical attention immediately. Accessing the Latest SDS Nalco 77225 Internal Boiler Treatment | PDF - Scribd

Nalco 77225 is a harmful and corrosive, alkaline liquid boiler treatment registered with NSF through January 2026 for use in steam lines where contact with food may occur. The safety data sheet mandates strict handling protocols, including specialized personal protective equipment and specific material compatibility, to mitigate risks of severe skin burns and permanent eye damage. For the most current, region-specific safety data, use the Ecolab SDS Search Nalco 77225 SDS (GHS) | PDF | Toxicity - Scribd

Managing chemical safety in industrial environments requires up-to-date documentation to ensure both personnel safety and regulatory compliance. As of May 2026, the Nalco 77225 Safety Data Sheet (SDS) remains a critical reference for facilities utilizing advanced boiler feedwater treatments.

This guide provides a comprehensive overview of the updated safety protocols, chemical composition, and handling requirements for Nalco 77225. 1. Product Overview: What is Nalco 77225?

Nalco 77225 is an advanced internal boiler treatment solution designed for effective scale control. It utilizes a sophisticated blend of phosphate residuals and "Transport Plus" polymer technology to prevent the formation of hard scale deposits on heat transfer surfaces.

Primary Function: Scale inhibition and boiler integrity maintenance.

Physical Form: Light yellow liquid with a slight ammoniacal odor.

Key Characteristics: Highly alkaline (pH ~13.5) and fully soluble in water. 2. Updated Hazard Identification (GHS Classification)

According to the latest Global Harmonized System (GHS) standards, Nalco 77225 is classified as a hazardous and corrosive substance. Hazard Category Description Corrosive to Metals Category 1; May be corrosive to metals. Acute Toxicity Category 4; Harmful if swallowed. Skin Corrosion Category 1A/1B; Causes severe skin burns. Serious Eye Damage Category 1; Causes irreversible eye damage. 3. Chemical Composition & Ingredients

The efficacy and hazards of Nalco 77225 stem from its concentrated alkaline components. The primary active ingredients typically include:

Potassium Hydroxide (CAS 1310-58-3): 10% – 30% concentration. This provides the alkalinity necessary for treatment but is the main driver of its corrosive nature.

Tetrapotassium Pyrophosphate (CAS 7320-34-5): 10% – 30% concentration. Acts as a buffering and sequestering agent. The safety information for NALCO® 77225 , an

Proprietary Polymers: Specialized "Transport Plus" polymers that keep minerals suspended to prevent scaling. 4. Essential First Aid Measures

In the event of accidental exposure, immediate action is required to minimize tissue damage.

Eye Contact: Immediately rinse with water for at least 15 minutes, holding eyelids open. Seek urgent medical attention from a Poison Center or doctor.

Skin Contact: Remove contaminated clothing instantly and rinse the affected skin with plenty of water or use a safety shower.

Inhalation: Move the individual to fresh air. If breathing is difficult, seek medical help immediately.

Ingestion: Rinse mouth with water. Do NOT induce vomiting. Call a physician or poison control center immediately. 5. Safe Handling and Storage Protocols

Due to its high pH and corrosive properties, Nalco 77225 requires specific storage conditions and materials.

Personal Protective Equipment (PPE): Always wear chemical splash goggles, a full face shield, and chemical-resistant gloves (e.g., Neoprene or Butyl Rubber).

Storage Materials: Store only in the original container or a corrosive-resistant container with a resistant inner liner.

Compatibility Note: Avoid using PTFE (Teflon) as a shaft or plunger seal, as it may not be compatible with this specific formulation.

Temperature: Store in a cool, well-ventilated area away from strong acids and extreme heat. 6. Environmental and Disposal Considerations

Nalco 77225 is alkaline and can impact local water pH if released into the environment.

Spill Response: Contain spills using non-combustible absorbent materials like sand or earth. Dike large spills to prevent entry into waterways or sewers.

Disposal: Unused products and contaminated containers must be disposed of at an approved waste disposal plant according to local and national regulations. How to Access the Full SDS Nalco 77225 Internal Boiler Treatment | PDF - Scribd

DISCLAIMER: This document is a template generated for informational and educational purposes only. It is based on typical formulations and hazard data associated with this product class. It is NOT an official legal document from Ecolab/Nalco and should not be used as a substitute for the official, manufacturer-issued Safety Data Sheet. Always consult the official SDS provided by the supplier before handling, using, or transporting chemical products.

SECTION 2: HAZARD(S) IDENTIFICATION

2.1 Classification of the Substance or Mixture (GHS-US) SECTION 2: HAZARD(S) IDENTIFICATION 2

2.2 Label Elements (GHS-US)

2.3 Other Hazards

SECTION 3: COMPOSITION/INFORMATION ON INGREDIENTS

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 |

(Note: Specific percentage ranges are withheld as a trade secret. Exact composition may vary by region; refer to the specific SDS accompanying the shipment.)

4. First-aid measures

SECTION 14: TRANSPORT INFORMATION

14.1 UN/ID Number

14.2 UN Proper Shipping Name

14.3 Transport Hazard Class(es)

14.4 Packing Group

14.5 Environmental Hazards

14.6 Transport in Bulk

Step 5: Notify Your Waste Disposal Vendor

Provide the updated SDS to your hazardous waste hauler, as the aquatic toxicity classification may change the waste code (e.g., from non-RCRA to D002/D002).

Why the Nalco 77225 SDS Has Been Updated

Manufacturers like Nalco (Ecolab) are required to review and revise Safety Data Sheets periodically—typically every three to five years, or immediately upon discovery of new hazard information. The latest update for Nalco 77225, effective as of Q4 2025 / Q1 2026, was driven by three primary factors:

  1. Changes in GHS Classification: The Globally Harmonized System (GHS) has updated its criteria for certain aquatic toxicity and skin corrosion categories.
  2. Raw Material Reformulation: Nalco has modified the corrosion inhibitor package (specifically the azole and phosphonate blend) to meet stricter environmental discharge limits.
  3. Exposure Scenario Expansion: New data on long-term worker exposure during high-pressure injection maintenance.

SECTION 7: HANDLING AND STORAGE

7.1 Precautions for Safe Handling

7.2 Conditions for Safe Storage, Including Any Incompatibilities

1. Revised GHS Hazard Classifications

Older SDS versions listed Nalco 77225 primarily as a non-hazardous or mild irritant. The updated document now clearly states:

This shift means facilities must now treat the product with greater caution regarding spill containment and wastewater disposal.