iFluor® 660 amine

iFluor® 660 amine is a far-red fluorescent, amine-functionalized dye designed for covalent labeling of carbonyl-containing biomolecules, including compounds with aldehyde and carboxyl groups.

Amine-Reactive Chemistry: Supports conjugation to aldehyde and activated carboxyl groups.
Spectral Properties: Excitation/emission maxima of 663/678 nm.
pH Stability: Exhibits pH-independent fluorescence from pH 3 to 11.
Dye Compatibility: Spectrally similar to Alexa Fluor® 660, with bright, photostable fluorescence.

<p>Fluorescent dye amines are the most popular tool for conjugating dyes to a target compound with a carbonyl group (e.g., aldehyde, carboxylic acid or activated carboxy group such as NHS ester).</p>

Datasheet

SDS

Catalog	Size	Price	Quantity
1075	1 mg	Price

Overview

AAT Bioquest's iFluor® dyes are optimized for labeling proteins, particularly antibodies. These dyes are bright, photostable, and have minimal quenching on proteins. They can be well excited by the major laser lines of fluorescence instruments (e.g., 350, 405, 488, 555, and 633 nm). The iFluor® 660 family has spectral properties nearly identical to those of Alexa Fluor® 660 (Alexa Fluor® is the trademark of Invitrogen). In addition, the fluorescence of iFluor® 660 is pH-insensitive over a broad range, pH 3-11. These spectral characteristics make this new dye family an excellent alternative to Alexa Fluor® 660. iFluor® 660 amine is stable and used for modifying carbonyl groups (e.g., aldehyde and carboxy groups).

Calculators

Common stock solution preparation

Table 1. Volume of DMSO needed to reconstitute specific mass of iFluor® 660 amine to given concentration. Note that volume is only for preparing stock solution. Refer to sample experimental protocol for appropriate experimental/physiological buffers.

	0.1 mg	0.5 mg	1 mg	5 mg	10 mg
1 mM	86.87 µL	434.348 µL	868.697 µL	4.343 mL	8.687 mL
5 mM	17.374 µL	86.87 µL	173.739 µL	868.697 µL	1.737 mL
10 mM	8.687 µL	43.435 µL	86.87 µL	434.348 µL	868.697 µL

Molarity calculator

Enter any two values (mass, volume, concentration) to calculate the third.

Mass (Calculate)		Molecular weight		Volume (Calculate)		Concentration (Calculate)		Moles
mg	÷	1151.15 g/mol	=	mL	x	mM	=	mmol

Citations

View all 3 citations: Citation Explorer

Deep Sequencing Analysis of the Eha-Regulated Transcriptome of Edwardsiella tarda Following Acidification

Authors:

Gao, D and Liu, N and Li, Y and Zhang, Y and Liu, G and others, undefined

Journal:

Metabolomics (Los Angel) (2017): 2153--0769

Suramin inhibits cullin-RING E3 ubiquitin ligases

Authors:

Wu, Kenneth and Chong, Robert A and Yu, Qing and Bai, Jin and Spratt, Donald E and Ching, Kevin and Lee, Chan and Miao, Haibin and Tappin, Inger and Hurwitz, Jerard and others, undefined

Journal:

Proceedings of the National Academy of Sciences (2016): E2011--E2018

Glycosaminoglycan mimicry by COAM reduces melanoma growth through chemokine induction and function

Authors:

Piccard, Helene and Berghmans, Nele and Korpos, Eva and Dillen, Chris and Aelst, Ilse Van and Li, S and ra , undefined and Martens, Erik and Liekens, S and ra , undefined and Noppen, Sam and Damme, Jo Van and others, undefined

Journal:

International Journal of Cancer (2012): E425--E436

References

View all 49 references: Citation Explorer

Sequential ordering among multicolor fluorophores for protein labeling facility via aggregation-elimination based beta-lactam probes

Authors:

Sadhu KK, Mizukami S, Watanabe S, Kikuchi K.

Journal:

Mol Biosyst (2011): 1766

Visualizing dengue virus through Alexa Fluor labeling

Authors:

Zhang S, Tan HC, Ooi EE.

Journal:

J Vis Exp. (2011)

Fluorescent "Turn-on" system utilizing a quencher-conjugated peptide for specific protein labeling of living cells

Authors:

Arai S, Yoon SI, Murata A, Takabayashi M, Wu X, Lu Y, Takeoka S, Ozaki M.

Journal:

Biochem Biophys Res Commun (2011): 211

Neuroanatomical basis of clinical joint application of "Jinggu" (BL 64, a source-acupoint) and "Dazhong" (KI 4, a Luo-acupoint) in the rat: a double-labeling study of cholera toxin subunit B conjugated with Alexa Fluor 488 and 594

Authors:

Cui JJ, Zhu XL, Ji CF, Jing XH, Bai WZ.

Journal:

Zhen Ci Yan Jiu (2011): 262

Simultaneous detection of virulence factors from a colony in diarrheagenic Escherichia coli by a multiplex PCR assay with Alexa Fluor-labeled primers

Authors:

Kuwayama M, Shigemoto N, Oohara S, Tanizawa Y, Yamada H, Takeda Y, Matsuo T, Fukuda S.

Journal:

J Microbiol Methods (2011): 119

Physical properties

Molecular weight	1151.15
Solvent	DMSO

Spectral properties

Correction factor (260 nm)	0.07
Correction factor (280 nm)	0.08
Extinction coefficient (cm ^-1 M ^-1)	250000 ¹
Excitation (nm)	663
Emission (nm)	678
Quantum yield	0.26 ¹

Usage and storage

Intended use	Research Use Only (RUO)
Storage	Freeze (< -15 °C); Minimize light exposure

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Page updated on October 28, 2026