Product description:
Acid Yellow 73 is obtained by co heating phthalic acid and resorcinol, with the molecular formula C20H12O5 and molecular weight of 332.31.
It is a yellow red to red powder that can be used as an adsorption indicator; Redox indicator; Fluorescence analysis of sulfur ions.
Product parameter:
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CAS No.
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518-47-8
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EINECS No.
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208-253-0
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C.I. No.
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45350
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Molecular formula
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C20H10O5Na2
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Molecular weight
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376.27
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Strength
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100%
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Appearance
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Orange or light yellow red to red powder
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Application
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1. Adsorption indicator for precipitation titration: Prepare a 0.1% ethanol solution or a 1% aqueous solution with its sodium salt.
2. Fluorescein is the matrix of luminescent substances. A substance that gives fluorescence to many living organisms.
3. Used as an indicator for chemical analysis, biological staining agent, and cosmetic coloring agent.
4. It is an important pigment for antifreeze, which can make the antifreeze exhibit green fluorescence.
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Odor
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Odorless
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Solubility
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Soluble in water, the solution appears yellow red with extremely strong yellow green fluorescence
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PH value range of acid-base indicator discoloration
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Pink uorescence(4.0) to green uorescence(6.0)
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Melting point
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320°C
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Boiling point
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620.8°C
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Flash point
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232.6℃
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Density
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0.579 at 20℃
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Vapor pressure
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2.133hPa
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PH value
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8.3 (10g/l,H2O,20℃)
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Acidity coefficient (pKa)
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2.2,4.4,6.7 (at 25℃)
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Maximum wavelength
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(λmax)491nm,493.5nm,490
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LogP
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4.54220
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PSA
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81.65000
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Storage condition
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Store at +5°C to +30°C
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Packaging
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25kg/drum
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MOQ
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25kgs
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Shipping method
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DHL,UPS,FedEx,Sea,Air
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Product Pictures:
Catalog:
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