QSY-21

SKU: orb3028521

Description

QSY-21 is a fluorescence quencher with broad absorption in the far-red and near-infrared regions, effectively quenching the fluorescence of dyes that emit in these areas. It is a carboxylic acid derivative with a strong maximum absorption at 661 nm, making it a suitable acceptor for fluorescence resonance energy transfer (FRET) applications. QSY-21 is commonly used as a quencher for Cyanine5, Cyanine5.5, AF 647, or other spectrally similar fluorescent dyes.

Key Properties

• Target: Others
• Molecular Weight: 718.26
• CAS Number: 1200894-41-2
• Formula: C₄₁H₃₆ClN₃O₅S
• SMILES: [Cl-].O=C(O)C1CCN(CC1)S(=O)(=O)C=2C=CC=CC2C=3C=4C=CC(=CC4[O+]=C5C=C(C=CC53)N6C=7C=CC=CC7CC6)N8C=9C=CC=CC9CC8

Storage & Handling

• Storage: -20°C
• Expiration Date: 12 months from date of receipt.
• Disclaimer: For research use only

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