Description

A crystalline solid with color ranging from pale orange or pink to reddish-orange, yellow, red, or purple.

Maximum absorption wavelength (λmax): 517 nm (0.1 mol/L NaOH).
Soluble in alkaline aqueous solutions, acetone, and ethanol; slightly soluble in methanol and dimethyl sulfoxide (DMSO); insoluble in water, mineral oil, and toluene.

Melting point: 295–300°C.

Specification

Grade	Indicator
Formula	C₂₀H₈O₅Br₄
MW	647.9
CAS	15086-94-9
Appearance	Buff to Orange powder
Absortivity (1%/1cm at λ 517.4nm)	1463
Loss on drying	≤1.0%
Water insoluble matter	≤0.5%
Solubility (1% DI Water + Liq NH3)	Clear Bright Red Solution
Lambda Max	21 nm in Water & 1 ml 1% sodium carbonate
Storage	R.T. Protect from moisture

Application

Used as a biological staining agent.
Employed as an analytical reagent and adsorption indicator.
Applied for fluoride ion detection and for the titrimetric analysis of bromide and iodide ions.
Used in the preparation of Azur B-Eosin Y reserve solutions.
Involved in chemical synthesis and acts as a photocatalyst.
Used in material science and as an organic catalyst.
Serves as a visible-light redox photocatalyst.

Documents

COA

SDS

Disclaimer: For laboratory research use only.

Eosin Y, Free Acid