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CAS 596-01-0

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α-Naphtholphthalein

Description:
α-Naphtholphthalein, with the CAS number 596-01-0, is an organic compound that belongs to the class of phthaleins, which are known for their use as pH indicators. It is characterized by its structure, which consists of two naphthalene rings connected by a phthalic acid moiety. This compound typically appears as a crystalline solid and is insoluble in water but soluble in organic solvents such as alcohol and ether. α-Naphtholphthalein exhibits a color change in response to pH variations, transitioning from colorless in acidic conditions to a pink or red hue in alkaline environments, making it useful in titrations and other analytical applications. Additionally, it has applications in dyeing and as a chemical intermediate in organic synthesis. However, it is important to handle this compound with care, as it may pose health risks upon exposure. Overall, α-Naphtholphthalein is a valuable substance in both laboratory and industrial settings due to its distinctive properties and reactivity.
Formula:C28H18O4
InChI:InChI=1S/C28H18O4/c29-25-15-13-23(17-7-1-3-9-19(17)25)28(22-12-6-5-11-21(22)27(31)32-28)24-14-16-26(30)20-10-4-2-8-18(20)24/h1-16,29-30H
InChI key:InChIKey=HQHBAGKIEAOSNM-UHFFFAOYSA-N
SMILES:O=C1OC(C=2C1=CC=CC2)(C=3C4=C(C(O)=CC3)C=CC=C4)C=5C6=C(C(O)=CC5)C=CC=C6
Synonyms:
  • 1(3H)-Isobenzofuranone, 3,3-bis(4-hydroxy-1-naphthalenyl)-
  • 1,1′-Naphthol-4,4′-phthalein
  • 1-Naphtholphthalein
  • 3,3-Bis(4-hydroxy-1-naphthalenyl)-1(3H)-isobenzofuranone
  • 3,3-Bis(4-hydroxy-1-naphthyl)-1,3-dihydroisobenzofuran-1-one
  • 3,3-Bis(4-hydroxy-1-naphthyl)phthalide
  • 3,3-Bis(4-hydroxynaphthalen-1-yl)-2-benzofuran-1-one
  • Di-p-α-Naphtholphthalide
  • Naphtholphthalein blue
  • Phthalide, 3,3-bis(4-hydroxy-1-naphthyl)-
  • See more synonyms
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