Fluorescein disodium salt concentrate for examination of subterranean waters (Uranine AP) (C.I. 45350)
Supplier: Merck
Certificates
About this item
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
CAS Number:518-47-8
:
Formula:C₂₀H₁₀Na₂O₅
MDL Number:MFCD00167039
Density:1.601 g/cm³ (20 °C)
Molecular Weight:376.28 g/mol
Melting Pt:> 300 °C
Merck Index:13,04185
:M-Clarity™ quality level = MQ200
Storage Temperature:Ambient
EINECS:208-253-0
Specifications
- Environmentally Preferable:
Specifications
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 %
Specification Test Results
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