P-hydroxybenzoic Acid (Phba)

we are indulged in exporting and manufacturing an P-hydroxybenzoic Acid (PHBA) in Quzhou Zhejiang China. It is a white crystalline solid that is slightly soluble in water and chloroform but more soluble in polar organic solvents such as acetone. 4-Hydroxybenzoic acid is primarily known as the basis for the preparation of its esters known as parabens which are used as preservatives in cosmetics and some ophthalmic solutions

AppearanceWhite crystalline powder
Content (dry basis) %:99.6 min
Melting point a 214-217
OdorNo odor
SolubilityClear and transparent
Drying loss %:0.20 max
Color (Pt-Co): 10max
Ash content % :0.02 max
Sulfate (SO42-) % : 0.01 max
Chloride (Cl-) % :0.005 max
Phenol % :0.01max
Salicylic acid % :0.02 max
4-hydroxyisophthalic acid (ppm) :500max
Methanol-insoluble matters (ppm) : 50 max
Potassium (K+)( ppm)5
Sodium (Na+) (ppm) 5 max.
Iron (Fe) (ppm ):5max
Calcium+Magnesium (Ca2++Mg2+)(ppm):10 max
CAS No. 99-96-7 for PLC plastics