</span><table border='0' align='center' width='95%' cellpadding='3' cellspacing='1'><tr><td>QUOTE (dnmilikan @ May 6 2003, 03:04 PM)</td></tr><tr><td id='QUOTE'> For that matter when one reviews the PH of Sodium Thiosulfate, it is shown to have a PH of 11. That is certainly alkaline.

When one reviews the PH of Sodium Sulfite it is shown to have a PH of 9.5. That is certainly alkaline as well.
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According to my MSDS, Sodium Thiosulfate solution has a pH of 6.0 to 8.5 - not alkaline at all&#33;

Sodium Metabisulfite - 4.0 to 5.0 - acid

Sodium Sulfite - 8.8 to 10.0 - somewhat alkaline.