Fluorescein disodium salt concentrate for examination of subterranean waters (Uranine AP) (C.I. 45350)

Supplier: Merck

Synonyms: Yellow No. 82-(6-hydroxy-3-oxo-(3H)-xanthen-9-yl)benzoic acid disodium saltDisodium 2-(3-oxo-6-oxidoxanthen-9-yl)benzoate3',6'-Dihydroxy-3H-spiro[isobenzofuran-1,9'-xanthen]-3-one, disodium saltAcid Yellow 73Fluorescein sodium salt

M-Clarity™ quality level = MQ200

1.08462.0100EA 97.2 GBP
1.08462.0100 1.08462.1000
Fluorescein disodium salt concentrate for examination of subterranean waters (Uranine AP) (C.I. 45350)
Fluorescein disodium salt
Formula: C₂₀H₁₀Na₂O₅
MW: 376,28 g/mol
Melting Pt: > 300 °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

Identity (UV/VIS-Spectrum) passes test
Appearance Reddish-brown powder, eventually with granular and bright parts.
Absorption maximum λmax. (buffer pH 8.0) 489 - 491 nm
Spec. Absorptivity A 1%/1cm (λmax; 0.005 g/l; buffer pH 8.0; calc. on dried substance) ≥ 1800
Loss on drying (110 °C) ≤ 7 %

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