CH₂O
Neutral Buffered Formaline, NBF
M.W: 30.03  CAS: 50-00-0  EC: 200-001-8  EC INDEX: 603-001-00-X  

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• Assay 3.7 – 4%
• Content of MeOH 1 – 1.5% w/v
• pH 6.8 – 7.2

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C₃₂H₂₅N₃Na₂O₉S₃
Acid blue 22, China blue, Methyl blue
M.W: 737.72  CAS: 28631-66-5  EC: 249-113-9  TARIC: 32041200

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• Appearance Brownish-purple crystalline powder With metallic lustre
• Absorption Maxima in (0.005 mol/L HCl) 594 – 610nm
• Solubility in water (H₂O)
• Used with fuchsin acid as Mallory’s connective tissue stain visualizes chromosomes and cellulose wal

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