| Identification | Back Directory | [Name]
ROSOLIC ACID | [CAS]
603-45-2 | [Synonyms]
AURIN
AURINE
CORALLIN
CI 43800
AURIN GR
Nsc 7805
Aurin 555
Rosolic aci
CI NO 43800
CORALLIN RED
Spirit Aurin
Rosalic Acid
Spirit Aurine
Roseolic acid
P-ROSOLIC ACID
CORALLIN YELLOW
PARAROSOLIC ACID
AURIN (C.I. 43800)
cyclohexa-2,5-dienone
4,4'-Dihydroxyfuchsone
LABOTEST-BB LT00847601
ROSOLIC ACID INDICATOR
Corallin Spirit Soluble
4-(Bis(4-hydroxyphenyl)
Rosolic acid (CI x 43800)
ROSOLIC ACID (C.I. 43800)
Para-ROSOLIC ACID INDICATOR
RHODIZONIC ACID Dihydrate(P)
ROSOLIC ACID PRACTICAL GRADE
Corallin
Aurin
p-Rosolic Acid
ROSOLIC ACID C.I. 43800 INDICATOR FOR MICROSCOPY
AURIN FOR MICROSCOPY (Rosolic Acid) C.I. No 43800
4-[BIS(4-HYDROXYPHENYL)METHYLENE]-2,5-CYCLOHEXADIENONE
4-(bis(4-hydroxyphenyl)Methylene)cyclohexa-2,5-dienone
4-[bis(4-hydroxyphenyl)methylene]-5-cyclohexadien-1-one
4-[BIS(4-HYDROXYPHENYL)METHYLENE]-2,5-CYCLOHEXADIEN-1-ONE
4-[bis(p-hydroxyphenyl)methylene]cyclohexa-2,5-dien-1-one
2,5-Cyclohexadien-1-one, 4-bis(4-hydroxyphenyl)methylene-
4-(p,p′-dihydroxybenzhydrylidene)-2,5-cyclohexadien-1-one
4-(p,p′-Dihydroxybenzhydrylidine)-2,5-cyclohexadien-1-one
4-[BIS-(P-HYDROXYPHENYL)METHYLENE]-2,5-CYCLO-HEXADIEN-1-ONE
2,5-cyclohexadien-1-one, 4-[bis(p-hydroxyphenyl)methylene]-
4-[bis(p-hydroxy- Aphenyl)methylene]-2,5-cyclohexadien-1-one
4-[Bis(4-hydroxyphenyl)methylene]-2,5-cyclohexadienone, Aurin | [EINECS(EC#)]
210-041-8 | [Molecular Formula]
C19H14O3 | [MDL Number]
MFCD00001624 | [MOL File]
603-45-2.mol | [Molecular Weight]
290.31 |
| Chemical Properties | Back Directory | [Appearance]
red crystals or powder | [Melting point ]
309°C (decompose) | [Boiling point ]
372.4°C (rough estimate) | [density ]
1.2497 (rough estimate) | [refractive index ]
1.4200 (estimate) | [storage temp. ]
Store at room temperature. | [solubility ]
Practically insoluble in water, benzene; freely soluble in ethanol | [Colour Index ]
43800 | [form ]
Crystalline Powder | [pka]
6.98(at 25℃) | [color ]
Red-brown to brownish-red | [PH]
5.0-6.8, yellow to pink | [PH Range]
6.8(YELLOW)--8.2(RED) | [Stability:]
Stable. Incompatible with strong oxidizing agents. | [Water Solubility ]
Soluble in alcohol, sodium hydroxide, potassium hydroxide and strong acids. Insoluble in water. | [ε(extinction coefficient)]
≥11000 at 264-270nm in ethanol
≥50000 at 478-486nm in ethanol | [λmax]
534.6nm, 479.5nm, 482nm | [Merck ]
14,881 | [BRN ]
2055205 | [Major Application]
electrorheological materials, films patterning, antireflective coatings, thermochromic materials, photoresists, film patterning, recording materials, lithium battery, semiconductors, printing materials, inks, corrosion inhibitors, adhesives, drugs, detecting viable cells, treatment of Alzheimer’s disease | [Uses]
A red coloring medium made from phenol or carbolic acid. It
is soluble in alcohol and ether but insoluble in water. When
fabrics were steeped in this solution, the color was nonactinic
and therefore safe for darkrooms, windows, and doorways.
Aurin was also mixed with water-soluble gums and brushed
on the backs of collodion and silver bromide gelatin plates as
an antihalation layer. | [CAS DataBase Reference]
603-45-2 | [EPA Substance Registry System]
2,5-Cyclohexadien-1-one, 4-[bis(4-hydroxyphenyl)methylene]- (603-45-2) |
| Hazard Information | Back Directory | [Chemical Properties]
red crystals or powder | [Uses]
activates heme oxygenase, anti-oxidative stress, inhibits DNA fragmentation | [Definition]
ChEBI:Aurin is a diarylmethane. | [Biological Activity]
The transition range of p-Rosolic acid is around pH 6.6-8.0 (Below this pH range it is yellow and above it red). | [Purification Methods]
It forms green crystals with a metallic luster, but the colour depends on the solvent used. When recrystallised from brine (saturated aqueous NaCl) acidified with HCl, it forms red needles, but when recrystallised from EtO/AcOH, the crystals have a beetle iridescent green colour. It has been recrystallised from Me2CO (although it dissolves slowly), methyl ethyl ketone, 80-95% AcOH and from AcOH/*C6H6. An aqueous KOH solution is golden yellow, and a 70% H2SO4 solution is deep red in colour. An alternative purification is to dissolve this triphenylmethane dye in 1.5% of aqueous NH3, filter, and heat to 70-80o, then acidify with dilute AcOH by adding it slowly with vigorous stirring, whereby the aurin separates as a brick-red powder or as purplish crystals depending on the temperature and period of heating. Filter off the solid, wash it with H2O and a little dilute AcOH, then H2O again. Stir this solid with Et2O to remove any ketones and allow it to stand overnight in the Et2O, then filter and dry it in air then in a vacuum. [Gomberg & Snow J Am Chem Soc 47 202 1925, Baines & Driver J Chem Soc 123 1216 1923, UV: Burawoy Chem Ber 64 462 1941, Beilstein 8 IV 2646.] |
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J & K SCIENTIFIC LTD.
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Alfa Aesar
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Energy Chemical
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400-0056266 |
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Maya High Purity Chemicals
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Spectrum Chemical Manufacturing Corp.
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021-021-021-67601398-809-809-809 15221380277 |
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