Specification Sheet
Product Name Fluorescein isothiocyanate isomer I,
≥97.5% (HPLC)
Product Number F4274
Product Brand SIGMA
CAS Number 3326-32-7
Molecular Weight 389.38
 
TEST SPECIFICATION
APPEARANCE (COLOR) Yellow to Very Dark Yellow and Orange to Very Dark Orange
APPEARANCE (FORM) Powder
PURITY (HPLC AREA %) ≥ 97.5 %
SOLUBILITY (COLOR) Yellow to Very Dark Yellow and Green-Yellow to Very Dark Green-Yellow
SOLUBILITY (TURBIDITY) Clear
SOLUBILITY (METHOD) 10 MG/ML ACETONE
INFRARED SPECTRUM CONFORMS TO STRUCTURE
RECOMMENDED RETEST PERIOD 45 MONTHS