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Other Names: Oxymethylene, formic aldehyde, methanal, formalin
Formula: HCHO
Sp. Gr.: 1.1 for 37% solution
Viscosity: 37% solution - water-thin
Remarks: Colorless gas; soluble in water, alcohol and ether; polymerizes easily. Is usually handled as an aqueous solution with or without methanol which acts as an inhibitor of the polymerization. Properties of 37% solution (also called formaldehyde or formalin): clear, colorless liquid; pH 3.0. Used in urea and melamine resins, in making phenolic resins, ethylene glycol, fertilizer, dyes and medicine. Also used in embalming fluids and as a preservative. Formaldehyde causes irritation of the skin, eyes, nose and throat. Proceed with caution when selecting a pump for handling formaldehyde.
Pump Notes: Cast iron construction may be used on an expendable basis. Percent concentration and end use of product may require other construction. PTFE and Kalrez® are recommended elastomers with Viton® rated fair. A mechanical shaft seal is recommended.
Viton® and Kalrez® are registered trademark of DuPont Dow Elastomers®, L.L.C.