1.07233

Supelco

Phenolphthalein

indicator ACS,Reag. Ph Eur

Synonym(s):
Phenolphthalein
Empirical Formula (Hill Notation):
C20H14O4
CAS Number:
Molecular Weight:
318.32
MDL number:
EC Index Number:
201-004-7
Pricing and availability is not currently available.

storage conditions

no restrictions.

Quality Level

grade

ACS reagent

Agency/Method

reag. Ph. Eur.

vapor pressure

<0.00001 Pa ( 50 °C)

mp

263.7 °C

density

1.296 g/cm3 at 20 °C

bulk density

350‑450 kg/m3

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

Related Categories

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 %

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