S P E C I F I C A T I O N S

PHLOXINE B CERTIFIED
(C. I. 45410)

Synonyms:				Phloxine B Certified; C.I. 45410; Nuclear Stain; Acid 						Red 92; Eosin 10B; D&C Red 28; Cyanosine; Eosin 						Blue; Fluorescein 2’,4’,5’,7’-tetrabromo-4,5,6,7-							tetrachloro-disodium salt

CAS No:				18472-87-2

Chemical Formula:			C20H2O5Br4Cl4Na2

Formula Weight:			829.66

Description:				Brick-Red Powder

Dye content:				> 80.0%

Loss on drying:			<10 %

Lambda Max:			548 (510) nm in 50 % Ethanol

Solubility 0.1%(in distilled
Water – 1 ml 1% Na2Co3):		Clear solution 

Visual Transition Interval:	From pH 1.1 (colorless) 
To      pH 3.3 (purple)

Effective: 12/30/08