5-Ethyl-2-thiouracil-¹³C,¹⁵N₂

5-Ethyl-2-thioxo-2,3-dihydropyrimidin-4(1H)-one-1,2,3-¹³C,¹⁵N₂

5-Ethyl-2-thiouracil-13C,15N2 is a high-purity reference standard produced and distributed by WITEGA Laboratorien Berlin-Adlershof GmbH. Designed for LC-MS/MS and GC-MS workflows, it supports traceable calibration, method validation, and confirmatory analysis with dependable mass shifts. Use it as an LC-MS/MS calibration solution to build robust curves and ensure traceability for residue control across regulated applications. Furthermore, as a GC-MS reference material, it provides stable response factors and clear identification characteristics.

This reference standard enables confident quantification and consistent performance in complex matrices. It helps analysts verify recovery, monitor matrix effects, and maintain long-term reproducibility. In addition, its labeling pattern facilitates accurate peak assignment and enhanced selectivity in targeted assays.

• Optimized for quantitative LC-MS/MS and GC-MS measurements with reliable mass offsets.
• Supports calibration, quality control, and confirmatory analysis in one workflow.
• Ensures traceability from stock solutions to reportable results.
• Compatible with common solvents and routine sample preparation practices.

Typical use cases include a wide range of regulated and research settings:

• Regulated laboratories performing routine residue testing and compliance checks.
• Pharmaceutical research focused on quantitative method development.
• Residue control programs requiring reproducible calibration across batches.
• Metabolism studies that benefit from clear tracking of labeled analyte signals.
• Multi-residue method development where selectivity and robustness are critical.

In practice, analysts prepare calibration levels, establish linearity, and verify accuracy using quality controls. During confirmatory analysis, 5-Ethyl-2-thiouracil-13C,15N2 strengthens identification criteria and supports consistent quantification from run to run. Moreover, it streamlines method transfer between instruments. For product details and availability, please contact WITEGA.

You can download your Safety Data Sheet for OP331

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