I... maybe? It sure looks like it's got a tab on top like a beverage, but sodium carbonate is a surfactant, so good point!
Old school washing soda came with a tab lid you'd pull off.
So did Comet powdered chlorine bleach. I remember because I was made to clean the bath tub with that as a kid
Whoa, you've got the eldritch knowledge. That's back before Comet had the dispenser holes in the lid like a bottle of parmesan cheese.
Don't confuse the two. Worst spaghetti I ever ate.