5-Nitroisophthalicacid with CAS 618-88-2

what is of  5-Nitroisophthalicacid with CAS 618-88-2? 

5-Nitrobenzene-1,3-Dicarboxylic Acid is used in the synthesis of Glycopyrrolate, a novel pharmaceutical compound based on PDE IV inhibitors; used in the treatment of respiratory complaints. Also used in the synthesis of coordination polymers.

Specification

Melting point	259-261 °C(lit.)
Boiling point	350.79°C (rough estimate)
density	1.6342 (rough estimate)
refractive index	1.5282 (estimate)
Fp	120°C
storage temp.	Sealed in dry,Room Temperature
pka	2.81±0.10(Predicted)
Water Solubility	Soluble in water.1.5 g/L at 20°C
BRN	1976587

Application

Packing

Usually packed in 25kg/drum,and also can be do customized package.