Nalco 3dt 449 Msds New Review

| PPE Item | Old Requirement | New Requirement | | :--- | :--- | :--- | | Gloves | Nitrile, 8 mil | , 15 mil minimum. (Nitrile degrades within 2 hours) | | Goggles | Standard splash | Full face shield over chemical goggles | | Apron | Tyvek | Neoprene apron with sleeves | | Respirator | None for normal use | NIOSH approved with acid gas cartridge (P100) if misting |

A: Per new Section 10 – No. This generates chlorine gas and heat. Always add biocides to the cooling tower water before adding 3DT 449. nalco 3dt 449 msds new

[Insert current date] | Next planned revision: Upon Nalco’s next SDS release. | PPE Item | Old Requirement | New

| Parameter | Old MSDS (Pre-2020) | New MSDS (Current) | | :--- | :--- | :--- | | | Skin Irrit. 2 | Skin Corr. 1B (More severe) | | Eye Hazard | Eye Irrit. 2A | Eye Dam. 1 (Irreversible damage possible) | | pH (Concentrate) | ~2.5 | <1.5 (Stronger acid content) | | GHS Pictograms | Exclamation mark | Corrosion + Exclamation | | PBT/vPvB status | Not assessed | Not classified as PBT/vPvB | Critical takeaway: The new MSDS upgrades the dermal hazard from simple irritation to corrosion . This changes required PPE from basic nitrile gloves to neoprene or butyl rubber with face shields. Section 2: Product and Chemical Identity (Section 1 & 3 of SDS) Product Name: NALCO 3DT 449 Chemical Family: Organic phosphonate and polymer blend in acidic aqueous solution. Manufacturer: Nalco Water (An Ecolab Company) Always add biocides to the cooling tower water