1.03887

Fluorescein sodium (C.I. 45350)

Fluorescence indicator Reag. Ph Eur

• Synonym(s): Fluorescein sodium (C.I. 45350)
• Empirical Formula (Hill Notation): C₂₀H₁₀Na₂O₅
• CAS Number: 518-47-8
• Molecular Weight: 376.27
• MDL number: MFCD00167039
• UNSPSC Code: 12171501
• EC Index Number: 208-253-0
• NACRES: NB.21

Properties

• product name: Fluorescein sodium (C.I. 45350), indicator Reag. Ph Eur
• agency: reag. Ph. Eur.
• Quality Level: 200
• form: powder
• potency: 6720 mg/kg LD₅₀, oral (Rat)
• loss: ≤10% loss on drying, 110°C
• color: red-brown
• pH: 8.3 (20 °C, 10 g/L in H₂O)
• mp: >300 °C
• solubility: 500 g/L
• bulk density: 600 kg/m³
• λmax: 490-492 nm (buffer pH 8.0)
• storage temp.: 2-30°C
• InChI: 1S/C20H12O5.2Na/c21-11-5-7-15-17(9-11)25-18-10-12(22)6-8-16(18)19(15)13-3-1-2-4-14(13)20(23)24;;/h1-10,21H,(H,23,24);;/q;2*+1/p-2
• InChI key: NJDNXYGOVLYJHP-UHFFFAOYSA-L

Description

Analysis Note

Appearance: Redishbrown powder, eventually with granular and bright parts.
Identity (UV/VIS-Spectrum): passes test
Identity (IR-spectrum): passes test
Absorption maximum λ_max. (buffer pH 8.0): 490 - 492 nm
Spec. Absorptivity A 1%/1cm (λ_max; 0.005 g/l; buffer pH 8.0; calc. on dried substance): ≥ 1850
Loss on drying (110 °C): ≤ 10 %
Suitability as indicator (Adsorption indicator for argentometry): passes test

Safety Information

• Storage Class: 11 - Combustible Solids
• wgk_germany: WGK 1
• flash_point_f: 423.7 °F - Pensky-Martens closed cup
• flash_point_c: 217.6 °C - Pensky-Martens closed cup