Methyl 4-Hydroxybenzoate (USP-NF, BP, Ph. Eur., JP) pure, pharma grade

Methyl 4-Hydroxybenzoate (USP-NF, BP, Ph. Eur., JP) pure, pharma grade
Content: 500 GRM
Physical Description:
solid
Quality Name: pure, pharma grade
Specification: Assay: 99.0-100.5%
Identity according to Pharmacopoeias: passes test
A 1% , 1 cm, ? 258 nm: 1040-1120
Melting range: 125-128°C
T.L.C.: passes test

?maximum limit of impurities:
Appearance and colour of solution: passes test
Acidity: passes test
Insoluble matter in C2H5OH 96%: passes test
Residue on ignition (as SO4): 0.1 %
Residual solvents (Ph.Eur/USP): passes test
Unspecified impurities: 0.5 %
Total impurities: 1.0 %
Impurity A (4-Hidroxibenzoic Acid): 0.5 %
Related substances:
Heavy metals (as Pb): 0.0020 %