Paraformaldehyde solution 4% in PBS is commonly used to preserve tissues for routine histology in many labs. Paraformaldehyde solution 4% in PBS solution should be clear, colorless, with no precipitate and the pH 7.0 - 7.6 (25°C). Paraformaldehyde solution 4% is supplied as a 4% Paraformaldehyde solution in 1X PBS. Paraformaldehyde solution 4% in PBS can be used to recognize and stabilize the expression of intracellular antigen.
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