Not necessarily. The chemical itself is largely unchanged. The "new" MSDS uses stricter GHS hazard categorization (e.g., H318 for eye damage was previously H319 in older versions). Always treat the product with the same level of respect.
Why keep the latest SDS on file
Move to fresh air immediately; seek medical help if breathing is difficult. nalco 3dt 449 msds new
: Contact with eyes or skin may cause irritation; it should not be ingested or inhaled. Personal Protective Equipment (PPE) : Wear safety goggles or face protection. Not necessarily
(new data): Nitrile gloves fail at 90 minutes. Change double-gloved nitrile every 60 minutes if butyl is unavailable. nalco 3dt 449 msds new
Take off contaminated clothing; rinse skin with a shower or plenty of water.