Phenolphtalein, ACS

Name: Phenolphtalein, ACS
SKU: 02102608-CF

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Key features and details

Phenolphtalein, ACS

SKU: 02102608-CF

Synonyms

3,3-bis[4-Hydroxyphenyl]-1-[3H]- isobenzofuranone; 3,3-bis(p-Hydroxyphenyl) phthalide; a-(p-Hydroxyphenyl)-a-(4-oxo-2,5-cyclohexadien-1-ylidine)-o-toluic acid

CAS Number:

77-09-8

Molecular Formula:

C20H14O4

Molecular Weight:

318.328 g/mol

Beilstein Registry Number:

284423

EC Number:

201-004-7

MDL Number:

MFCD00005913

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Product Description

Phenolphtalein, ACS

Application Notes

Phenolphthalein Can be used in a 1% alcoholic solution as an indicator in titrations of mineral and organic acids and most alkalies. Not suitable for ammonia. Very sensitive to CO2; and, in estimating carbonates, the liquid must be boiled. Borax can be titrated with phenolphthalein as an indicator only when glycerol is present, because the color gradually fades away as the acid is added. Usable with a few alkaloids.

Usage Statement

Unless specified otherwise, MP Biomedical's products are for research or further manufacturing use only, not for direct human use. For more information, please contact our customer service department.

Key Applications

Indicator in titrations of mineral and organic acids and most alkalies

Specifications

SKU	02102608-CF
Alternate Names	3,3-bis[4-Hydroxyphenyl]-1-[3H]- isobenzofuranone; 3,3-bis(p-Hydroxyphenyl) phthalide; a-(p-Hydroxyphenyl)-a-(4-oxo-2,5-cyclohexadien-1-ylidine)-o-toluic acid
Application Notes	Phenolphthalein Can be used in a 1% alcoholic solution as an indicator in titrations of mineral and organic acids and most alkalies. Not suitable for ammonia. Very sensitive to CO2; and, in estimating carbonates, the liquid must be boiled. Borax can be titrated with phenolphthalein as an indicator only when glycerol is present, because the color gradually fades away as the acid is added. Usable with a few alkaloids.
Base Catalog Number	102608
Beilstein Registry Number	284423
CAS #	77-09-8
Color Index	764
Density	1.299 at 77° F (NTP, 1992)
EC Number	201-004-7
Format	Powder
Grade	ACS grade
Hazard Statements	H341-H350-H361
Melting Point	496 to 504° F (NTP, 1992)
Molecular Formula	C20H14O4
Molecular Weight	318.328 g/mol
Personal Protective Equipment	Eyeshields, full-face particle respirator, Gloves, respirator filter, respirator cartridges
pKa	9.7 at 25 °C(Lit.)
RTECS Number	SM8380000
Safety Symbol	GHS08
Solubility	less than 1 mg/mL at 66° F (NTP, 1992)
Usage Statement	Unless specified otherwise, MP Biomedical's products are for research or further manufacturing use only, not for direct human use. For more information, please contact our customer service department.
UV Visible Absorbance	λmax 552 nmλmax 374 nm (2nd)
Vapor Pressure	6.7X10-13 mm Hg @ 25 deg C /Estimated/