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46970

Sigma-Aldrich

Fluorescein sodium salt

p.a.

Synonym(s):

Acid Yellow 73, D&C;Yellow No. 8, NaFl, NaFluo, Sodium fluorescein, Uranine

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About This Item

Empirical Formula (Hill Notation):
C20H10Na2O5
CAS Number:
Molecular Weight:
376.27
Colour Index Number:
45350
Beilstein:
3833041
EC Number:
MDL number:
UNSPSC Code:
12171501
PubChem Substance ID:
NACRES:
NA.32
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grade

p.a.

Quality Level

form

powder

fluorescence

λex 460 nm; λem 515 nm(lit.)

SMILES string

[Na+].[Na+].[O-]c1ccc2c(Oc3cc([O-])ccc3C24OC(=O)c5ccccc45)c1

InChI

1S/C20H12O5.2Na/c21-11-5-7-15-17(9-11)24-18-10-12(22)6-8-16(18)20(15)14-4-2-1-3-13(14)19(23)25-20;;/h1-10,21-22H;;/q;2*+1/p-2

InChI key

RGPLGPBQJOQFJS-UHFFFAOYSA-L

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1 of 4

This Item
292168586056579688
isotopic purity

99 atom % 13C

isotopic purity

99 atom % 13C

isotopic purity

99 atom % 13C

isotopic purity

99 atom % 13C

mass shift

M+1

mass shift

M+1

mass shift

M+2

mass shift

M+1

Quality Level

200

Quality Level

200

Quality Level

200

Quality Level

200

form

solid

form

solid

form

solid

form

solid

bp

225 °C/100 mmHg (lit.)

bp

225 °C/100 mmHg (lit.)

bp

225 °C/100 mmHg (lit.)

bp

225 °C/100 mmHg (lit.)

mp

44-46 °C (lit.)

mp

44-46 °C (lit.)

mp

44-46 °C (lit.)

mp

44-46 °C (lit.)

General description

Fluorescein Sodium Salt (FSS) is a xanthene dye having a polycrystalline structure with a monoclinic system. Fluorescein is a synthetic organic compound available as a dark orange/red powder soluble in water and alcohol.

Application

Fluorescein Sodium Salt (FSS) is used to conduct in-vivo skin studies.[1]

Xanthene fluorophores, like Fluorescein Sodium Salt (FSS), are versatile compounds used across diverse fields of chemistry and life sciences.[2]

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

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

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