Phosphotungstic Acid crystals (24WO3 . 2H3PO4 . xH2O) Reagent Grade 10 grams.
CAS No.: 12067-99-1
Forensics Lab Supply Number 0028240.
Useful in histology in combination with haematoxylin (PTAH) for staining of cell specimens. It binds to fibers of connective tissues as well as collagen and fibrin.
It is also used as a negative stain for viruses and nerves in transmission electron microscopy.