Certificate Of Analysis
Product Name Cresol red solution,
0.04 wt. % in H2O
Product Number 318841
Product Brand SIAL
CAS Number 1733-12-6
Molecular Formula C21H18O5S
Molecular Weight 382.43
 
TEST SPECIFICATION LOT 00517AH RESULTS
APPEARANCE RED LIQUID RED LIQUID
UV-VISIBLE SPECTRUM IN ETHANOL 0.01 G/L, ETOH
  E426(+/-3)NM = 21,000 (MINIMUM) E424=25,000
  E272(+/-3)NM = 10,500 (MINIMUM) E272=19,800
VISUAL TRANSITION PH 0.0 = RED PH 0.0 = RED
INTERVAL PH 1.0 = YELLOW PH 1.0 = YELLOW
  PH 7.0 = YELLOW PH 7.0 = YELLOW
  PH 8.8 = RED PH 8.8 = RED
QUALITY CONTROL FEBRUARY 2007