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568-02-5

568-02-5 Structure

568-02-5 Structure
IdentificationBack Directory
[Name]

ALIZARINE BLUE
[CAS]

568-02-5
[Synonyms]

C.I.67410
Alizarin Blue
ALIZARINE BLUE
5,6-Dihydroxynaphtho[2,3-f]quinoline-7,12-dione
Naphtho[2,3-f]quinoline-7,12-dione, 5,6-dihydroxy-
[Molecular Formula]

C17H9NO4
[MDL Number]

MFCD00228012
[MOL File]

568-02-5.mol
[Molecular Weight]

291.26
Chemical PropertiesBack Directory
[Melting point ]

268-270°
[Boiling point ]

433.27°C (rough estimate)
[density ]

1.2442 (rough estimate)
[refractive index ]

1.4500 (estimate)
[pka]

3.17±0.20(Predicted)
Hazard InformationBack Directory
[Chemical Properties]

Violet crystals. Insoluble in water, soluble in glacial acetic acid and hot benzene.
[Uses]

As indicator in saturated alcoholic solution. pH: pink 0.0 to yellow 1.6; yellow 6.0 to green 7.6.
[Definition]

ChEBI: An organic heterotetracyclic compound that is naphtho[2,3-f]quinoline-7,12-dione carrying two additional hydroxy groups at positions 5 and 6. Used as an acid-base indicator. Between pH 0.0 and pH 1.6 it changes from pink to yellow, and between pH 6.0 and pH 7.6 it changes from yellow to green.
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