| 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 |
[Insert date, e.g., 2021]
The Safety Data Sheet (SDS) identifies this product as a hazardous alkaline mixture primarily used for internal boiler water treatment. It is classified under the Global Harmonized System (GHS) as Category 1 for metal corrosion and Category 1A for skin corrosion , carrying the signal word "Danger" . Hazard Identification
Under the Globally Harmonized System (GHS), Nalco 77225 carries a "Danger" signal word due to the following classifications: Corrosive to Metals (Category 1):