Phthalimide is a ROTICHROM® Pestilyse® HPLC reference material provided as 100 mg in glass for chromatographic and environmental laboratory use. Characterised by CAS number 85-41-6 and empirical formula C₈H₅NO₂, it has a molar mass of 147,13 g/mol and a density of 1,21 g/cm³. The boiling point is 366 °C, the flash point is 150 °C and the EG number is 201-603-3. This defined organic standard supports HPLC and gas chromatography applications in residue and environmental analysis where reliable identity and physical data are essential. Available from manufacturer Carl ROTH, the 100 mg glass pack suits preparation of calibration stocks and working standards in analytical workflows. Laboratories engaged in method development, routine quantification and confirmatory testing benefit from the stated molar mass, density and thermal properties for documentation and handling. The product aligns with environmental analysis and chromatography categories that call for a pestilyse-grade phthalimide reference with clear CAS and formula specification. This article is part of Chromatography standards (GC, HPLC, pesticides), in Analytical standards & reference materials. Key features Assay: ≥99.5 % CAS number: 85-41-6 Pack size: 100 mg glass EG nr.: 201-603-3 Empirical formula: C₈H₅NO₂ Molar mass: 147,13 g/mol Technical Information Sheet: Safety Data Sheet: