5-DTAF [5-(4,6-Dichlorotriazinyl)aminofluorescein] CAS 51306-35-5

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Physical properties

Molecular weight	495.28
Solvent	DMSO

Spectral properties

Absorbance (nm)	487
Correction Factor (260 nm)	0.32
Correction Factor (280 nm)	0.35
Extinction coefficient (cm ^-1 M ^-1)	80000¹
Excitation (nm)	498
Emission (nm)	517
Quantum yield	0.7900¹, 0.95²

Storage, safety and handling

H-phrase	H303, H313, H333
Hazard symbol	XN
Intended use	Research Use Only (RUO)
R-phrase	R20, R21, R22
Storage	Freeze (< -15 °C); Minimize light exposure
UNSPSC	12171501

Overview SDS Protocol

CAS

51306-35-5

Molecular weight

495.28

Absorbance (nm)

487

Correction Factor (260 nm)

0.32

Correction Factor (280 nm)

0.35

Extinction coefficient (cm ^-1 M ^-1)

80000¹

Excitation (nm)

498

Emission (nm)

517

Quantum yield

0.7900¹, 0.95²

The 5-isomer of fluorescein dichlorotriazine (5-DTAF) is highly reactive with proteins. Unlike other reactive fluoresceins, 5-DTAF not only reacts with amino groups, but also reacts with thiol groups and even directly reacts with hydroxy groups such as polysaccharides and other alcohols in aqueous solution at pH above 9. Due to its high reactivity, 5-DTAF is also used to label carbohydrates.

Calculators

Common stock solution preparation

Table 1. Volume of DMSO needed to reconstitute specific mass of 5-DTAF [5-(4,6-Dichlorotriazinyl)aminofluorescein] *CAS 51306-35-5* 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	201.906 µL	1.01 mL	2.019 mL	10.095 mL	20.191 mL
5 mM	40.381 µL	201.906 µL	403.812 µL	2.019 mL	4.038 mL
10 mM	20.191 µL	100.953 µL	201.906 µL	1.01 mL	2.019 mL

Molarity calculator

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Mass (Calculate)		Molecular weight		Volume (Calculate)		Concentration (Calculate)		Moles
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Spectrum

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Spectral properties

Absorbance (nm)	487
Correction Factor (260 nm)	0.32
Correction Factor (280 nm)	0.35
Extinction coefficient (cm ^-1 M ^-1)	80000¹
Excitation (nm)	498
Emission (nm)	517
Quantum yield	0.7900¹, 0.95²

Product Family

Name	Excitation (nm)	Emission (nm)	Extinction coefficient (cm ^-1 M ^-1)	Correction Factor (280 nm)
5-FAM [5-Carboxyfluorescein] CAS 76823-03-5	493	517	83000	0.178
5-SFX [5-FAM-X, SE] CAS 148356-00-7	493	517	83000	0.178
5-FITC [Fluorescein-5-isothiocyanate] CAS 3326-32-7	491	516	73000	0.35
6-DTAF [6-(4,6-Dichlorotriazinyl)aminofluorescein] CAS 118357-32-7	498	517	80000¹	0.35
5-IAF [5-Iodoacetamidofluorescein] CAS 63368-54-7	498	517	80000¹	0.35
5-CR110 [5-Carboxyrhodamine 110] Single isomer	499	525	84000	0.091
5-CR6G [5-Carboxyrhodamine 6G] Single isomer	522	546	94000	0.214
5-TAMRA [5-Carboxytetramethylrhodamine] CAS 91809-66-4	552	578	90000	0.178
5-ROX [5-Carboxy-X-rhodamine] CAS 216699-35-3	578	604	82000	0.168
5-TRITC [Tetramethylrhodamine-5-isothiocyanate] CAS 80724-19-2	544	570	100000	0.34
DiBAC4(5) [Bis-(1,3-dibutylbarbituric acid)pentamethine oxonol]	591	615	-	-
DiSBAC2(5) [Bis-(1,3-diethylthiobarbituric acid)pentamethine oxonol]	636	655	-	-
Show More (3)

Images

Figure 1. Chemical structure for 5-DTAF [5-(4,6-Dichlorotriazinyl)aminofluorescein] *CAS 51306-35-5*

Citations

View all 2 citations: Citation Explorer

Cellulose Dissolved in Ionic Liquids for Modification of the Shape of Keratin Fibers
Authors: Liu, Yuwei and Jing, Su and Carvalho, Diana and Fu, Jiajia and Martins, Madalena and Cavaco-Paulo, Artur
Journal: ACS Sustainable Chemistry \& Engineering (2021): 4102--4110

3D Confocal Laser Scanning Microscopy for Quantification of the Phase Behaviour in Agarose-MCC co-gels in Comparison to the Rheological Blending-law Analysis
Authors: Mhaske, Pranita and Farahnaky, Asgar and Kasapis, Stefan
Journal: Food Biophysics (2020): 1--8

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