Merck
All Photos(1)

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

Quality Level

grade

ACS reagent

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

Looking for similar products? Visit Product Comparison Guide

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 %

Pictograms

Exclamation markHealth hazard

Signal Word

Danger

Hazard Classifications

Carc. 1B - Muta. 2 - Repr. 2 - Skin Irrit. 2

Storage Class Code

6.1D - Non-combustible, acute toxic Cat.3 / toxic hazardous materials or hazardous materials causing chronic effects

WGK

WGK 3

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Certificate of Analysis

Enter Lot Number to search for Certificate of Analysis (COA).

Certificate of Quality

Enter Lot Number to search for Certificate of Quality (COQ).

Our team of scientists has experience in all areas of research including Life Science, Material Science, Chemical Synthesis, Chromatography, Analytical and many others.

Contact Technical Service