A Universal EM Negative Stain used for viruses. In tissue samples it stabilizes nucleic acids and cell membranes. These solutions are more stable than uranyl acetate and they react primarily with negatively charged groups in the absence of phosphate ions. Grade: Reagent Grade, A.C.S. …

For ultra fine grain structure, Electron Microscopy Sciences' Uranyl Formate offers amazing advancement in negative staining for microscopy. Contents are radioactive.

(3',3",5 '5"-Tetrabromophenol-sulfonthalein) Formula: C₁₉H₁₀O₅SBr₄   Formula Weight: 669.97   CAS #: 115-39-9

Used as a substitute for uranyl acetate in either double-staining techniques and also as a solo stain. Formula: UO₂Mg(CH₃COO)₄ Formula Weight: 530.0 CAS #: 20596-93-4