Japan wax
3500440
205757264
2008-04-15T10:16:29Z
Tonkawa68
5549409
'''Japan wax''' is a pale-yellow, waxy, water-insoluble solid with a gummy feel, obtained from the berries of certain [[sumac]]s native to [[Japan]] and [[China]], such as ''[[Rhus]] verniciflua'' (Japanese sumac tree) and ''[[Rhus|R]]. succedanea'' (Japanese wax tree).
Japan wax is a byproduct of [[lacquer]] manufacture. It is not a true [[wax]] but a [[fat]] that contains 10-15% [[palmitin]], [[stearin]], and [[olein]] with about 1% [[japanic acid]] (1,21-heneicosanedioic acid). Japan wax is sold in flat squares or disks and has a rancid odor. It is extracted by expression and heat, or by the action of [[solvent]]s.
==Uses==
Japan wax is used chiefly in the manufacture of [[candles]], furniture polishes, floor waxes, wax matches, [[soaps]], food packaging, pharmaceuticals, [[cosmetics]], [[pastels]], [[crayons]], buffing compounds, metal [[lubricants]], [[adhesives]], thermoplastic resins, and as a substitute for [[beeswax]].
==Other names==
Japan tallow; sumac wax; sumach wax; vegetable wax
==Properties==
Melting point =53°C
Soluble in [[benzene]], [[ether]], [[naphtha]] and [[alkalis]].
Insoluble in [[water]] or cold [[ethanol]].
Iodine value=4.5-12.6
Acid value=6-209
[[Saponification value]]=206.5-237.5
[[Category:Waxes]]
[[de:Japanwachs]]
[[ja:木蝋]]
[[it:Cera giapponese]]