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Polypropylene glycol or polypropylene oxide is the polymer of propylene glycol.
P 2021 (OTTO) Polypropylene glycol 1000 Cas 25322-69-4 - used as a primary ingredient in the making of paintballs. P 2021 (OTTO) Polypropylene glycol 1000 Cas 25322-69-4 - used as a primary ingredient in the making of some laxatives.