2% w/v Sodium thiosulfate is used as a general laboratory reagent and for Gomori’s methenamine staining (also known as Grocott-Gomori methenamine staining). The procedure is used for the detection of fungi in tissue sections. The MCC kit (cat # 6668A-KIT-4OZ) contains all the reagents needed for the procedure and consists of:

5% w/v chromic acid (catalog # 4981A)
0.3% w/v solution of gold chloride (catalog # 5967A)
0.04% w/v light green SF stain (catalog # 6455A)
1.5% w/v methenamine (catalog # 6667A)
3.125% w/v silver nitrate (catalog # 8021A)
1% w/v sodium bisulfite (catalog # 826A)
4% w/v sodium borate (catalog # 8270A)
2% w/v sodium thiosulfate (catalog # 872A).

All reagents are also available individually and are manufactured in the United States by Medical Chemical Corp.