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1.03887

Supelco

Fluorescein sodium (C.I. 45350)

indicator Reag. Ph Eur

Synonym(s):
Fluorescein sodium (C.I. 45350)
Empirical Formula (Hill Notation):
C20H10Na2O5
CAS Number:
Molecular Weight:
376.27
MDL number:
EC Index Number:
208-253-0

Agency

reag. Ph. Eur.

Quality Level

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

Related Categories

Analysis Note

Appearance: Redishbrown powder, eventually with granular and bright parts.
Identity (UV/VIS-Spectrum): passes test
Identity (IR-spectrum): passes test
Absorption maximum λmax. (buffer pH 8.0): 490 - 492 nm
Spec. Absorptivity A 1%/1cm (λmax; 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

Storage Class Code

11 - Combustible Solids

WGK

WGK 1

Flash Point(F)

423.7 °F - Pensky-Martens closed cup

Flash Point(C)

217.6 °C - Pensky-Martens closed cup

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