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QSY-9-succinimidyl ester

Fluorescent Dye

QSY-9-succinimidyl ester is a nonfluorescent acceptor molecule that features a terminal NHS ester group. It exhibits a broad and intense quenching capability in the 500-600 nm range, making it ideal for use in fluorescence resonance energy transfer (FRET) applications alongside fluorescent dyes emitting in this spectrum. The reactive NHS ester effectively labels primary amines (-NH2) on proteins, amine-modified oligonucleotides, and other amine-bearing compounds, facilitating diverse biochemical analyses and detection methodologies.

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Specifications

Manufacturer	Adooq Bioscience
CAS Number	304014-17-3
Applications	Fluorescent Dye
Formula	C₄₃H₃₈N₄O₁₃S₃
Molecular Weight	914.98
SMILES	O=C(C1CCN(S(=O)(C2=C(C3=C4C=CC(N(C)C5=CC=C(S(=O)(O)=O)C=C5)=CC4=[O+]C6=C3C=CC(N(C)C7=CC=C(S(=O)([O-])=O)C=C7)=C6)C=CC=C2)=O)CC1)ON8C(CCC8=O)=O

Storage & Solubility

In Vitro Solubility

Reported Solubility

No reported solubility data are available for this product.

Preparing Stock Solutions

Stock preparation is unavailable for this product molecular weight.

Calculated stock concentrations do not establish solvent solubility. Refer to the reported solubility data for experimental guidance.

Storage

Store powder at -20°C, keep desiccated.
In powder form, the chemical is stable for 36 months.
In solution, store at -20°C and use within 1 month to prevent loss of potency. Aliquot to avoid multiple freeze/thaw cycles.