Best Choice

Paraformaldehyde 

Purity：≥96%

Has no fixed melting point and decomposes upon heating. It has a melting point of 120-170 ℃ and is easily soluble in hot water, releasing formaldehyde. It is slowly soluble in cold water and can dissolve in caustic soda and alkali metal carbonate solutions. It is insoluble in alcohols and ethers, and highly polymer insoluble in water.

Hexamine

Purity: ≥99.3%

 C6H12N4 Boiling point: 263 ℃ (sublimation)

Density: 1.33g/cm3

Flash point: 250 ℃

Combustion heat: -239.7 kJ/mol

Critical pressure: 3.69MPa

Appearance: White  powder