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Phenolphthalein CAS 77-09-8


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  • 77-09-8

  • bosschem

  • 77-09-8

Phenolphthalein Basic information
Product Name: Phenolphthalein
CAS: 77-09-8
MF: C20H14O4
MW: 318.32
EINECS: 201-004-7
Mol File: 77-09-8.mol
Phenolphthalein Chemical 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)
Fp  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  147,243
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
CAS DataBase Reference 77-09-8(CAS DataBase Reference)
NIST Chemistry Reference Phenolphthalein(77-09-8)
IARC 2B (Vol. 76) 2000
EPA Substance Registry System 3,3-Bis(4-hydroxyphenyl)phthalide (77-09-8)
项 目 标 准 结 果
Items Standard Results
PH 变色域 8.0(无色)--10.0(红紫色) 8.0(无色)--10.0(红紫色)
质量系收系数 a(L/cm·g) 68.0---75.0 68.6
乙醇溶解试验 合格 合格
灼烧残渣(以硫酸盐计) ≤ 0.05 0.025
干燥失重 ≤ 1 0.1




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