ATTO Oxa12

ATTO Oxa12 is a lipophilic variety of ATTO 655.

Optical properties

λ _abs = 662 nm
ε _max = 1.25×10⁵ M ^-1 cm ^-1
λ _fl = 681 nm
n _fl = 30 %
τ _fl = 1.8 ns
CF ₂₆₀ = ε ₂₆₀ /ε _max = 0.32
CF ₂₈₀ = ε ₂₈₀ / ε _max = 0.12

ATTO Oxa12 is a lipophilic variety of ATTO 655.

Characteristic features of the label are strong absorption, good fluorescence quantum yield, excellent thermal and photo-stability, and outstanding ozone resistance. Absorption and fluorescence are pH-independent in the range pH 2 to 11, used in typical applications.

ATTO Oxa12 shows excellent solubility in polar organic solvents like DMF, DMSO or acetonitrile. ATTO Oxa12 is a cationic dye. After coupling to a substrate the dye carries a net electrical charge of +1. The fluorescence is excited most efficiently in the range 640 - 675 nm. A suitable excitation source is the 647 nm line of the Krypton-Ion laser or a diode-laser emitting at 650 nm.

ATTO-TEC is a wholly owned subsidiary of Leica Microsystems

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