The Safety Data Sheet for Nalco 77225, last updated in October 2018, identifies the boiler water treatment as a highly alkaline (pH >13) hazardous chemical that causes severe skin burns and eye damage. It is corrosive to metals, particularly aluminum, copper, and zinc, and requires strict personal protective equipment during handling. For the most current SDS, visit the Ecolab SDS Search portal Nalco 77225 SDS (GHS) | PDF | Toxicity - Scribd
Based on recent Globally Harmonized System (GHS) documentation: nalco 77225 safety data sheet updated