SAF Instant Yeast

Hi, is this yeast Kosher for Passover?

Ingredients: Yeast, Sorbitan Monostearate, Absorbic acid

Kosher for Passover for all (source vegetables)

how can yeast be Kosher for passover?
This type of Yeast makes baked goods rise?

As long as you’re not using it to make something Chametz it’s ok