Tolfenpyrad is a ROTICHROM® Pestilyse® HPLC reference material intended for chromatographic and environmental analytical applications. It carries CAS number 129558-76-5 and EG nr. 603-342-4, with the empirical formula C₂₁H₂₂ClN₃O₂ and a molar mass of 383,87 g/mol. Reported physical properties include a density of 1,2 g/cm³ and a flash point of 280,4 °C. The unit is 100 mg in glass, appropriate for calibration, method setup and residue-focused HPLC work within environmental analysis and chromatography. This Tolfenpyrad preparation from manufacturer Carl ROTH gives laboratories a defined Pestilyse® HPLC material for qualitative and quantitative tasks without implying bulk process use. Documented identity parameters and the small glass pack support orderly handling and traceability at the bench. Typical deployment includes gas chromatography and related separation methods where a characterised tolfenpyrad standard is needed for environmental and pesticide-related investigations. This article is part of Chromatography standards (GC, HPLC, pesticides), in Analytical standards & reference materials. Key features Assay: ≥99,5 % CAS number: 129558-76-5 Pack size: 100 mg glass EG nr.: 603-342-4 Empirical formula: C₂₁H₂₂ClN₃O₂ Molar mass: 383,87 g/mol Density: 1,2 g/cm³ Safety Data Sheet: