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1.07233

Supelco

Phenolphthalein

indicator ACS,Reag. Ph Eur

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Synonym(s):
Phenolphthalein
Empirical Formula (Hill Notation):
C20H14O4
CAS Number:
Molecular Weight:
318.32
MDL number:
EC Index Number:
201-004-7

grade

ACS reagent

Quality Level

Agency

reag. Ph. Eur.
suitable for SM 2310
suitable for SM 2320

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

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This Item
105945319236
Phenolphthalein indicator ACS,Reag. Ph Eur

Supelco

1.07233

Phenolphthalein

Phenolphthalein ACS reagent

Sigma-Aldrich

105945

Phenolphthalein

form

solid

form

powder

form

liquid

color

white to yellow-white

color

-

color

-

mp

263.7 °C

mp

261-263 °C (lit.)

mp

-35 °C

density

1.296 g/cm3 at 20 °C

density

1.27 g/cm3 at 32 °C

density

0.918 g/mL at 25 °C

λmax

551-554 nm (buffer pH 9.8)

λmax

374 nm (2nd), 552 nm

λmax

552 nm

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

6.1C - 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


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