Fluorescein disodium salt, pure

Supplier: Thermo Scientific

Synonyms: 3',6'-Dihydroxy-3H-spiro[isobenzofuran-1,9'-xanthen]-3-one, disodium salt, Acid Yellow 73, Yellow No. 8, Fluorescein sodium salt, 2-(6-hydroxy-3-oxo-(3H)-xanthen-9-yl)benzoic acid disodium salt, Disodium 2-(3-oxo-6-oxidoxanthen-9-yl)benzoate

173241000 173245000 173240025
ACRO173241000EA 65.4 EUR
ACRO173241000 ACRO173245000 ACRO173240025
Fluorescein disodium salt, pure
Fluorescein disodium salt
Formula: C₂₀H₁₀Na₂O₅
MW: 376,28 g/mol
Melting Pt: 320 °C
Density: 1,601 g/cm³ (20 °C)
Storage Temperature: Ambient
MDL Number: MFCD00167039
CAS Number: 518-47-8
EINECS: 208-253-0
Merck Index: 13,04185
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Specification Test Results

Appearance Orange-red to green-brown to dark brown Powder
Infrared spectrum Conforms
Loss on drying ≤10 % (105°C)
UV Lambda max 488 to 491 nm (in buffer pH 8)
Absorption Ratio P-15/P+15 1.2 to 1.7
Specific absorbance A (1%/1cm) ≥1700 (at lambda max.)

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