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Nalco 77225 Safety Data Sheet 2021 May 2026

| Chemical Name | CAS Number | Concentration (Wt%) | GHS Hazard Class | | --- | --- | --- | --- | | Phosphoric acid | 7664-38-2 | 10 – 30% | Skin Corr. 1B, Eye Dam. 1 | | Zinc compounds (as Zn) | 1314-13-2 (Zinc oxide) or similar | 1 – 5% | Aquatic Acute 1, Chronic 1 | | Organic corrosion inhibitor (proprietary) | Proprietary | 1 – 10% | Not classified | | Water | 7732-18-5 | Balance | Not classified |

Prevent entry into sewers, surface water, or groundwater. Zinc is particularly toxic to fish at low ppb levels. The 2021 SDS adds a stronger statement: “Notify relevant authorities if a significant spill enters waterways,” reflecting updated EPA/REACH notification thresholds. nalco 77225 safety data sheet 2021

NALCO 77225 is a designed to prevent corrosion and scale formation in open recirculating cooling water systems, closed loops, and once-through systems. Unlike commodity chemicals, this proprietary blend requires operators to rely entirely on the manufacturer’s SDS for accurate safety data. | Chemical Name | CAS Number | Concentration

Product Identifier: NALCO 77225 Manufacturer: Ecolab / Nalco Water SDS Revision Date: 2021 (Refer to specific section 16 of the official PDF for exact day/month) Product Type: Corrosion Inhibitor / Scale Control Agent for industrial water treatment Introduction: Why the 2021 SDS Matters The NALCO 77225 Safety Data Sheet (SDS), revised in 2021, represents a critical update to the hazard communication for this widely used industrial water treatment chemical. In 2021, regulatory bodies (including the UN GHS, OSHA, and EU CLP) continued tightening requirements for sub-categorization of hazards, particularly for metals toxicity and endocrine disruptors. Zinc is particularly toxic to fish at low ppb levels

| Chemical Name | CAS Number | Concentration (Wt%) | GHS Hazard Class | | --- | --- | --- | --- | | Phosphoric acid | 7664-38-2 | 10 – 30% | Skin Corr. 1B, Eye Dam. 1 | | Zinc compounds (as Zn) | 1314-13-2 (Zinc oxide) or similar | 1 – 5% | Aquatic Acute 1, Chronic 1 | | Organic corrosion inhibitor (proprietary) | Proprietary | 1 – 10% | Not classified | | Water | 7732-18-5 | Balance | Not classified |

Prevent entry into sewers, surface water, or groundwater. Zinc is particularly toxic to fish at low ppb levels. The 2021 SDS adds a stronger statement: “Notify relevant authorities if a significant spill enters waterways,” reflecting updated EPA/REACH notification thresholds.

NALCO 77225 is a designed to prevent corrosion and scale formation in open recirculating cooling water systems, closed loops, and once-through systems. Unlike commodity chemicals, this proprietary blend requires operators to rely entirely on the manufacturer’s SDS for accurate safety data.

Product Identifier: NALCO 77225 Manufacturer: Ecolab / Nalco Water SDS Revision Date: 2021 (Refer to specific section 16 of the official PDF for exact day/month) Product Type: Corrosion Inhibitor / Scale Control Agent for industrial water treatment Introduction: Why the 2021 SDS Matters The NALCO 77225 Safety Data Sheet (SDS), revised in 2021, represents a critical update to the hazard communication for this widely used industrial water treatment chemical. In 2021, regulatory bodies (including the UN GHS, OSHA, and EU CLP) continued tightening requirements for sub-categorization of hazards, particularly for metals toxicity and endocrine disruptors.