Specification Sheet
Product Name Neutral Red,
certified by the Biological Stain Commission
Product Number 861251
Product Brand SIAL
CAS Number 553-24-2
Molecular Weight 288.78
 
TEST SPECIFICATION
APPEARANCE DARK GREEN TO BLACK POWDER
INFRARED SPECTRUM CONFORMS TO STRUCTURE.
UV-VISIBLE SPECTRUM C = 0.005 G/L IN ACIDIFIED 50% ETHANOL
  E(541 +/- 3 NM) = 23,000 (MINIMUM)
  E(274 +/- 3 NM) = 26,000 (MINIMUM)
BIOLOGICAL STAIN PASSES STAINING TESTS
DYE CONTENT 50% (MINIMUM)
ELEMENTAL ANALYSIS CARBON 30.9% (MINIMUM)
  NITROGEN 9.6% (MINIMUM)
THIN-LAYER CONSISTENT WITH HISTORY
SOLUBILITY 1 MG/ML H2O; RED TO DARK RED OR DARK PURPLE
  SOLUTION
  APPROVED JUNE 13, 2002 JSB