Substitute for Na2SO3 ( Sodium Sulfide )

Probably, but not without knowing a LOT more about how it is used, what is being stabilized, etc, etc, etc. I could recommend several things, but half of them might react adversly with whatever else is in the soup...

If it is Na₂SO_3, IT CANNOT BE SODIUM SULPHIDE_.

Decide which and

Please re-state your problem --as far as actual application goes

If it is Na₂SO_3, IT CANNOT BE SODIUM SULPHIDE

Mukulmahant is absolutely correct: my ancient Chemical Rubber Handbook lists this compound as sodium sulfite. (The only reason I even opened this item was to find out whether someone had observed and protested the conflicting chemicals.) Sodium sulfide has no oxygen, and comes in several varieties: sodium mono sulfide is Na₂S; tetra is Na₂S₄, and penta is Na₂S₅. And there are multiple hydrated versions as well. Tell us what compound you actually have, what it is used for (in detail, if you want a good answer), perhaps why you want to substitute . . . the more we know about the problem, the better chance that we can help.

Sorry you're Right.. according to MSDS its chemical formula is Sodium Sulfite. I used Na2SO3 to stabilize the Mixing Powder between Coal Powder and NaOH. the Problem is I have to Import this chemical and its make my cost higher. Btw ..I am going to make Coal Liquid.. through some Experiment and by using Na2SO3..I found out that the result is Good. If I dont used Na2SO3 the result will be separated coz its unstable.

Where you want to replace it?

It is food grade?