Phthalic acid anhydride-d4 is the deuterium-labeled form of phthalic anhydride, supplied as an off-white to gray solid for use as an isotopic standard and synthetic reagent in analytical and preparative chemistry. It is commonly used in mass spectrometry, NMR, tracer studies, and as a labeled intermediate for synthesis.
- Deuterium-labeled reagent for isotopic tracing and mass spectrometry.
- High isotopic enrichment (98 atom % D) for distinct mass shifts.
- Off-white to gray solid with recommended low-temperature storage for stability.
- Suitable as an internal standard, tracer, or synthetic intermediate.
- Molecular formula C8D4O3 and molecular weight 152.14 aid identification and calculations.