1. The product is the second monomer of acetal copolymer. It is copolymerized with paraformaldehyde at a ratio of 95:5 to produce copolyoxymethylene.

2. Used as solvent, silk finishing agent and sealing glue.

3. Used as electrolytic solvent for lithium battery, stabilizer for chlorine based solvent and pharmaceutical intermediate.

4. Used as an extractant for oil, waxes, dyes, and fiber derivatives.