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A6682912

Phenolphthalein , pH indicator , 77-09-8

Synonym(s):
3,3-Bis(4-hydroxyphenyl)-1(3H)-isobenzofuranone

CAS NO.:77-09-8

Empirical Formula: C20H14O4

Molecular Weight: 318.32

MDL number: MFCD00005913

EINECS: 201-004-7

Pack Size Price Stock Quantity
25G RMB28.00 In Stock
100g RMB91.20 In Stock
500g RMB364.80 In Stock
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Update time: 2022-07-08

PRODUCT Properties

Melting point: 261-263 °C (lit.)
Boiling point: 417.49°C (rough estimate)
Density  1.27 g/cm3 at 32 °C
refractive index  1.5400 (estimate)
Flash point: 24 °C
storage temp.  no restrictions.
solubility  Soluble in alcohol. Slightly soluble in ether. Slightly soluble in dimethyl sulfoxide and insoluble in benzene or hexane.
Colour Index  764
form  Solid
pka 9.4(at 25℃)
color  White to yellow-white
PH Range 8.0(colorless)-10(Red)
PH 7.8~10.0
Odor Odorless
Water Solubility  <0.1 g/100 mL
λmax 552nm, 553nm, 374nm, 205nm, 229nm, 276nm
Merck  14,7243
BRN  284423
Stability: Stable. Incompatible with strong oxidizing agents, alkalies.
Major Application Display device, sensors, semiconductors, fuel cells, photoreceptors, electronic packaging, authentication system for secure documents, inks, correction fluid, paints, detection of defects in films, floor coatings, textiles, corrosion testing, explosive, concrete, toys, detecting lipase activity of crop seeds, soaps, method for prevention of drugmisuse, cosmetics, diapers, detecting viable cells, carbohydrates, antimalarial, treating amyloid-associated diseases
LogP 2.410

Description and Uses

Phenolphthalein is one of those chemicals that is commonly used in the chemistry laboratory to tell if a solution is acidic or alkaline . These chemicals are called acid - base indicators and used as indicator for acidimetric titrations. Phenolphthalein exerts laxative effects by stimulating the intestinal mucosa and constricting smooth muscles. However, phenolphthalein is no longer used as a laxative due to the suspected carcinogenicity of this compound.

Safety

Symbol(GHS) 
GHS07,GHS08
Signal word  Danger
Hazard statements  H315-H341-H350-H361f
Precautionary statements  P202-P264-P280-P302+P352-P308+P313-P332+P313
Hazard Codes  Xn,T,F,Xi
Risk Statements  40-22-10-36/38-23/25-11-36/37/38-68-62-45-39/23/24/25-23/24/25
Safety Statements  45-36/37-33-24-16-7-36-26-53
WGK Germany  3
RTECS  SM8380000
TSCA  Yes
HS Code  29322910

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