P-Hydroxybenzoic Acid

P-Hydroxybenzoic Acid
Chemical Name: P-hydroxybenzoic acid
Molecular Formula: C7H6O3
Molecular Weight: 138.12
CAS#: 99-96-7

Physical & Chemical Properties: This product is white crystal powder without any smell but is astringent. It is easily dissolved in hot water, alcohol, ether, acetone; Slightly dissolved in cold water, benzene, and not dissolved in carbon bisulfide. It is dissolved in 125 cold water and relative density is 1.46.

Usage: This product could be used an intermediate of antiseptics, dyestuff, medicine and injection molding. Nipagins could be gained by its esterfication with alcohol. It is also the main raw material for liquid crystal polymer and material for pesticide intermediates.
Package: It is packed with braided plastic bags within double PE linings. Each has net weight of 25 kg. Those packed with PP bag has its net weight of 500 kg/b or 1000 kg/b.
Item
Specification
Polymer Grade
Technical Grade
Appearance
white crystal powder
white crystal powder
Purity(on dry base) %
99.6
99.0
Melting Point
214-217
212-216
Odor
odorless
odorless
Solubility
Clear and transparent
clear and transparent
Loss on Drying %
0.20
0.50
Color(Pt-Co)
10
40
Ash %
0.02
0.15
Sulfate(SO42-)
0.01
0.05
Chloride(Cl-) %
0.005
0.02
Phenol %
0.01
0.10
Salicylic Acid %
0.02
0.10
4-Hydroxyisophthalic Acid(HIPA) ppm
500
/
Insolubles in Methanol ppm
50
/
Potassium(K+) ppm
5
/
Sodium (Na+) ppm
5
/
Iron (Fe) ppm
5
/
Ca2++Mg2+ppm
5
/