(5,6)-FAM diacetate NHS ester

NHS esters FAM (Fluorescein)

Cat. #	Quantity	Price	Lead time
2934-1mg	1 mg	–	in stock
2934-25mg	25 mg	$160	in stock
2934-50mg	50 mg	$270	in stock
2934-100mg	100 mg	$520	in stock

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(5,6)-FAM diacetate NHS ester is a cell-permeable amine-reactive label for biomolecules.

This molecule is non-fluorescent until the acetate groups are cleaved by intracellular esterases resulting in the formation of a highly fluorescent fluorophore with emission in the green spectrum range (absorption maximum at ~492 nm, emission maximum at ~517 nm). Due to this characteristic, this product is used for tracking cells and flow cytometric evaluations and studying intracellular esterase.

Structure of (5,6)-FAM diacetate NHS ester

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(5,6)-FAM diacetate absorbance and emission spectra

General properties

Appearance:	white solid
Molecular weight:	557.46
CAS number:	150347-59-4
Molecular formula:	C₂₉H₁₉NO₁₁
Solubility:	good in DMF, DMSO
Quality control:	NMR ¹H and ³¹P, HPLC-MS (95%)
Storage conditions:	12 months after receival at -20°C in the dark. Transportation: at room temperature for up to 3 weeks. Avoid prolonged exposure to light. Desiccate.
MSDS:	Download
	Product specifications

Spectral properties

Excitation/absorption maximum, nm:	492
Emission maximum, nm:	517

Product is offered and sold for research purposes only. Product is not tested for safety and efficacy in food, drug, medical device, cosmetic, no express or implied authorization to use for any other purpose, including, without limitation, in vitro diagnostic purposes, for humans or animals or for commercial purposes.