Why did I get a white precipitate when chlorine reacted with sodium thiosulfate

What sulfate-containing compound forms a white precipitate when chlorine reacts with thiosulfate?
First, I reacted sodium hypochlorite with hydrochloric acid to produce chlorine (in situ) , then I added the sodium thiosulfate to the resultant solution and it gave me a white precipitate immediately.

I am guessing that chlorine was reduced to chloride and thiosulfate ion was oxidized to sulfate ion.
The sulfate ion , in turn , reacted with one other compound in the mixture ----either leftover hypochlorite , excess chloride Cl- , or sodium ion Na+ to form a white precipitate.

What was the white precipitate?


By the way,
The chlorine dissolved in the aqueous medium to form a pale yellow solution which then reacted with the thiosulfate to form the white ppt instantly.

I know that sulfate ions are produced when chlorine reacts with thiosulfate. But I don't know what is the name of this sulfate-containing compound.

Thanks again

It reacts with HCl as follows:
Na2S2O3 + 2HCl → 2NaCl + S + SO2 + H2O and the S is precipitated.
The other alternative that sod. tetra thionate may be formed but that is fairly soluble in water ( 5 mg/mL)
When you added Ba2+ the ppt. of BaSO4 is formed