Description

Chemical name: Trans-butenedioic acid
Molecular formula: C4H4O4
Molecular weight: **6.*7
CAS NO.: *******8


Solubility: (Unit: g/**0g)

*5 oC water	0.7
*6 oC ethanol	5.*6
*7 oC xylene	0.*3

Specification: Conform to FCCIV

Item	Unit	Index
Purity (base on C4H4O4)	%	*9.*0~**0.*0 (dry basis)
Heavy metal (base on Pb)	PPM	≤ *0
Arsenic (base on As)	PPM	≤ 3
Water content	%	≤ 0.5
Melting range	°c	**6~**2
Residue on ignition	%	≤ 0.1
Chroma (in 5% ethanol)	#	≤ *5
Maleic acid	%	≤ 0.1

Usage:Trans-butenedioic acid has bacteriostatic and antiseptic function. It can be used as acidulant, acidity regulator, acidifier, thermal-oxidative resist auxiliary, curing accelerant and spice. Widly used in producing various carbonic acid drink, wine, concentrated solid drink, ice cream and other cold foods and drink. It can replace malic acid, citric acid, for its acidity degree is 1.5 times of that of citric acid. Fumaric acid can be used as pharmaceutical intermediate and optical bleaching agent, also used in manufacturing unsaturated polyester resin.