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Phenolphtalein Indicator in Ethanol, 1g/L, Chem-Lab

Catalog Number 11957423
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Quantity:
100 mL
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This item is not returnable. View return policy

Description

Turns red-violent in the presence of bases (at pH 8.2–10). Phenolphtalein Indicator in Ethanol, 1g/L, Chem-Lab contains 1g C20H14O4 per 1L C2H5OH. It is used as an indicator in acid-base titrations. Manufactured according to Eur. Ph. 4.4.1.1 standards.

Phenolphthalein is usually dissolved in alcohol for use in experiments. It is a weak acid, which can lose H+ ions in solution. The phenolphthalein molecule is colorless, while the phenolphthalein ion is pink. In acidic and neutral solutions, the solution is colorless. When a base is added to the phenolphthalein, more ionization takes place, causing the solution to turn a red-violet color. This solution turns this pinkish color at pH 8.2–10.0.
CAS 77-09-8, 64-17-5
Concentration 1g C20H14O4 per 1L C2H5OH 80%
Molecular Formula C20H14O4
MDL Number MFCD00005913
Solubility Information Slightly soluble in water
InChI Key KJFMBFZCATUALV-UHFFFAOYSA-N
SMILES OC1=CC=C(C=C1)C1(OC(=O)C2=CC=CC=C12)C1=CC=C(O)C=C1
IUPAC Name 3,3-bis(4-hydroxyphenyl)-2-benzofuran-1-one
Molecular Weight (g/mol) 318.33
PubChem CID 4764
ChEBI CHEBI:34914
Formula Weight 46.07g/mol
Grade Eu. Ph. Chapter 4(4.1.1)
Odor Alcoholic
Density 0.86g/mL
pH Color Changes Colorless to red-violet at pH 8.2–10.0
Solvent or Matrix Ethanol 80%
pH ±7
Quantity 100 mL
Physical Form Liquid
Chemical Name or Material Phenolphtalein
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Safety and Handling

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Product Identifier
  • Phenolphtalein indicator in Ethanol
 Signal Word
  • Danger
 Hazard Category
  • Flammable liquid Category 2
 Hazard Statement
  • H225-Highly flammable liquid and vapour.
 Precautionary Statement
  • P210-Keep away from heat, hot surfaces, sparks, open flames and other ignition sources. No smoking.
 Supplemental information
  • MIXTURE LIST-Contains : ethanol
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