Furfural

♦Introduction
Furfural is light yellow to amber transparent liquid. If it is exposed in air, it can become chocolate brown liquid. It has the odor of almond benzaldehyde.If it is exposed in air & light, it can become red brown. It is an important chemical material

♦Uses
Mainly used in the production of furfuryl alcohol, it can be used as auxiliary to produce rubber accelerator, antiager of rubber and plastic, and antiseptic. Moreover, it is widely used in food, flavor, dye and paper.

♦Quality index
Technical indexes of industrial Furfural (GB/1926.1-88)
Name Furfural
Molecular formula: C₅H₄O₂
Alias: Furfural,α-Furfuraldehyde

Molecular Weight 96.08
UN No. 1199
Appearance light yellow to amber transparent liquid
Odor almond
Furfural Assay% ≥98.5
CAS No. 98-01-1
Moisture % ≤0.2
Acidity(mol/L)% ≤0.016
Density(P²⁰)g/ml 1.159-1.161(20/4^oC)
Refractive index¦ÇD(20^oC) 1.524-1.527
HS code 29321200
self-ignition point 315.5^oC
Boiling point 161.7^oC
Flash point 60^oC(close)
Freeze point -36.5^oC
Hazardous grade 6.1
Solubility slightly soluble in cold water, soluble in hot water, ethanol, benzene, aether, chloroform,
Explosbility Its vapour can mix with air and become explosive mixture. LEL2.1%
Packing
Sealed, kept in 240 kg or 250 kg enclosed steel barrel, the thickness of wall should be not less than 1.25mm.

♦Storage
Sealed, kept in cool and ventilating place. far away from fire and heat. Do no mix with air, oxidant, alkali and edible chemicals. It should not be kept in large quantity or long time. The light and ventilating facilities should be anti-explosive. Do not used facilities that may produces spark. The warehouse should be equipped with anti-leakage tools.

Properties
Appearance----------------------------- colorless to yellow liquid
Odor -----------------------------almond Odor
Relative Density---------------------------Relative Density(water=1)1.16
Solubility-------------------slightly soluble in cold water, soluble in hot water, ethanol, benzene, aether
Melting point----------------------------------36.5^oC
Saturated vapour pressure(kPa)--------------------------0.33kPa/25^oC
Flash point(^oC)--------------------------------60^oC
Ignition temperature(^oC)-------------------------------315
heat of combustion(kJ/mol)----------------------------2338.7
Relative vapour Density(air=1)-------------------------3.31
UEL%(V/V)----------------------------19.3
LEL%(V/V)----------------------------2.1%

Uses---------used as solvent, intermediate of flavor, furfuryl alcohol and tetrahydrofuran.
Boiling point(^oC)--------------------------------161.1
Vapour tension-------------------------------65^oC