... , non-dissolving benzene;molecular formula C6H6O4,molecular weight 142.1,melting point 152-155 3). Toxicity test data: LD502500----3500mg/kg 4 ... or cream colored acicular crystalClarity of solutionColorless and transparentPathogensNone Melting Point152-155Purity99.0% minLoss an drying0.5% maxResidue on ignition0 ...