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Properties of substance:

2-(3,4-dihydroxyphenyl)-3,5,7-trihydroxy-4H-1-benzopyran-4-one



skc-file

Synonyms:

quarcetin
quercetin
3',4',5,7-tetrahydroxyflavon-3-ol
meletin

Group of substances:

organic

Physical appearance:

lemon-yellow crystals

Empirical formula (Hill's system for organic substances):

C15H10O7

Molar/atomic mass: 302.24

Melting point (°C):

313-314

CAS №: 117-39-5

Solubility (g/100 g of solvent):

acetic acid: soluble [Ref.]
acetone: soluble [Ref.]
chloroform: slightly soluble [Ref.]
diethyl ether: sparingly soluble [Ref.]
ethanol 95%: sparingly soluble [Ref.]
ethanol abs.: 0.5 (20°C) [Ref.]
ethanol abs.: 4 (78°C) [Ref.]
methanol: soluble [Ref.]
pyridine: soluble [Ref.]
water: 0.6 [Ref.]

Dissociation:

pKa (1) = 6.62 (20°C, water)
pKa (2) = 9.7 (20°C, water)
pKa (3) = 11.56 (20°C, water)

References:

  1. CRC Handbook of Chemistry and Physics. - 95ed. - CRC Press, 2014. - pp. 3-478
  2. Seidell A. Solubilities of organic compounds. - 3ed., vol.2. - New York: D. Van Nostrand Company, 1941. - pp. 756
  3. Yalkowsky S.H., Yan H., Jain P. Handbook of aqueous solubility data. – 2nd ed. - CRC Press, 2010. - pp. 1041
  4. Березовский В.М. Химия витаминов. - М.: Пищевая промышленность, 1973. - pp. 623-624 [Russian]
  5. Березовский В.М. Химия витаминов. - М.: Пищепромиздат, 1959. - pp. 324 [Russian]
  6. Бургер К. Органические реагенты в неорганическом анализе. - М.: Мир, 1975. - pp. 132-133 [Russian]
  7. Журнал аналитической химии. - 2010. - т.65, №4. - pp. 382-386 [Russian]
  8. Каррер П. Курс органической химии. - 2-е изд., под ред. Колосова М.Н. - Л.: ГНТИХЛ, 1962. - pp. 682-683 [Russian]
  9. Краткая химическая энциклопедия. - Т. 2: Ж-Малоновый эфир. - М.: Советская энциклопедия, 1963. - pp. 534-535 [Russian]
  10. Справочник по растворимости. - Т.1, Кн.2. - М.-Л.: ИАН СССР, 1962. - pp. 1568 [Russian]
  11. Химическая энциклопедия. - Т. 2. - М.: Советская энциклопедия, 1990. - pp. 370 [Russian]

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    © Collected Ruslan Anatolievich Kiper, burewestnik@mail.ru