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

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

(Nitro, BT, p-Nitrotetrazolium Blue; 2, 2´-Di-p-nitrophenyl-5, 5´diphenyl-[3, 3´-dimethoxy-4, 4´-diphenylene] ditetrazolium chloride) Formula: C₄₀H₃₀Cl₂N₁₀O₆   Formula Weight: 817.6   CAS #:…

To adjust the pH of Uranyl compounds as well as a negative stain for electron microscopy. Formula: (COO)₂ UO₂ ·.3H₂O