Nalco 77225 Safety Data Sheet 2021 May 2026

| Component | PEL (OSHA) | TLV (ACGIH 2021) | STEL | | --- | --- | --- | --- | | Phosphoric acid | 1 mg/m³ | 1 mg/m³ | 3 mg/m³ | | Zinc (fume) | 5 mg/m³ | 2 mg/m³ | 10 mg/m³ | | Zinc (dust) | 15 mg/m³ | 10 mg/m³ | Not assigned |

Critique: While legal, the proprietary block makes medical or environmental risk assessment difficult. The 2021 revision did little to improve transparency beyond older versions.

Safety Data Sheets are living documents. Regulatory bodies like OSHA (in the US) and ECHA (in Europe) update standards frequently. If you are looking for the 2021 SDS, it likely reflects specific updates regarding: nalco 77225 safety data sheet 2021

Note: If you are currently using this product, you should ensure you have the latest available version. The 2021 SDS is valid for historical reference or if you are using inventory from that specific production period, but manufacturers typically release new SDS documents every 3 to 5 years or whenever significant formula/regulatory changes occur. | Component | PEL (OSHA) | TLV (ACGIH

NALCO 77225 is an industrial water treatment chemical, primarily used as a scale and deposit control agent in cooling water systems, boilers, and recirculating water loops. It is typically supplied as a liquid concentrate. Critique: While legal, the proprietary block makes medical

| Mode | Proper Shipping Name | UN Number | Class | Packing Group | Marine Pollutant | | --- | --- | --- | --- | --- | --- | | Road (DOT) | Corrosive liquid, acidic, inorganic, n.o.s. (phosphoric acid solution) | UN3264 | 8 | III | No (but zinc is environmentally hazardous) | | Sea (IMDG) | Same | UN3264 | 8 | III | Yes (Environ. Hazardous – zinc) | | Air (IATA) | Same | UN3264 | 8 | III | No |

Change in 2021: The IMDG Code amendment 40-20 (effective 2021) requires “Environmentally Hazardous Substance” marking for zinc-containing shipments >5 L. Ensure your 2021 SDS includes this marking note.