Description
Phenolphthalein, indicator ACS,Reag. Ph Eur
Synonym(s):
Phenolphthalein
Empirical Formula (Hill Notation):
C20H14O4
CAS Number:
77-09-8
Molecular Weight:
318.32
MDL number:
MFCD00005913
EC Index Number:
201-004-7
PROPERTIES
grade
ACS reagent
Quality Level
200
Agency
reag. Ph. Eur.
vapor pressure
<0.00001 Pa ( 50 °C)
form
solid
loss
≤1% loss on drying, 105°C
color
white to yellow-white
visual transition interval
8.2-9.8, colorless to red-violet
mp
263.7 °C
density
1.296 g/cm3 at 20 °C
bulk density
350‑450 kg/m3
λmax
551-554 nm (buffer pH 9.8)
storage temp.
2-30°C
InChI
1S/C20H14O4/c21-15-9-5-13(6-10-15)20(14-7-11-16(22)12-8-14)18-4-2-1-3-17(18)19(23)24-20/h1-12,21-22H
InChI key
KJFMBFZCATUALV-UHFFFAOYSA-N
Analysis Note
Identity (UV/VIS-Spectrum): passes test
Appearance: White to yellowish white powder
Clarity of the alkoholic solution (10 g/l ethanol): passes test
Absorption maximum λmax. (buffer pH 9.8): 551 - 554 nm
Spec. Absorptivity A 1%/1cm (λmax; 0.01 g/l; buffer pH 9.8; calculated on dried substance): 700 - 750
Transition range: pH 8.2 - pH 9.8 almost colorless - red-violet
Transition range (according to ACS): passes test
Transition interval (according Reag. Ph Eur): passes test
Loss on drying (105 °C): ≤ 1 %
Appearance: White to yellowish white powder
Clarity of the alkoholic solution (10 g/l ethanol): passes test
Absorption maximum λmax. (buffer pH 9.8): 551 - 554 nm
Spec. Absorptivity A 1%/1cm (λmax; 0.01 g/l; buffer pH 9.8; calculated on dried substance): 700 - 750
Transition range: pH 8.2 - pH 9.8 almost colorless - red-violet
Transition range (according to ACS): passes test
Transition interval (according Reag. Ph Eur): passes test
Loss on drying (105 °C): ≤ 1 %
SAFETY INFORMATION
Pictograms
GHS07,GHS08
Signal Word
Danger
Hazard Statements
H315 - H341 - H350 - H361f
Precautionary Statements
P202 - P264 - P280 - P302 + P352 - P308 + P313 - P332 + P313
Hazard Classifications
Carc. 1B - Muta. 2 - Repr. 2 - Skin Irrit. 2
Storage Class Code
6.1C - Combustible, acute toxic Cat.3 / toxic compounds or compounds which causing chronic effects
WGK
WGK 3
Flash Point(F)
Not applicable
Flash Point(C)
Not applicable