| Identification | More | [Name]
alpha-Naphtholphthalein | [CAS]
596-01-0 | [Synonyms]
1-NAPHTHOLPHTHALEIN
ALPHA-NAPHTHOLPHTHALEIN
NAPHTHOLPHTHALEIN
3,3’-bis(4-hydroxy-1-naphthalenyl)-1(3H)-Isobenzolfuranone
3,3-bis(4-hydroxy-1-naphthyl)phthalide
A-NAPHTHOLPHTHALEIN PRACTICAL GRADE
ALPHA-NAPHTHOLPHTHALEIN INDICATOR
1-NAPHTHOLPHTHALEIN, INDICATOR
ALPHA-NAPHTHOLPHTHALEIN(0.1% IN CA. 50% ETHANOL)[FOR PH DETERMINATION]
alpha-Naphtholphthalein, indicator, pure
1(3H)-Isobenzofuranone, 3,3-bis(4-hydroxy-1-naphthalenyl)-
à-naphtholphthalein
ɑ-Naphtholphthalein
l-naphtholphthalein
3,3-Bis(4-hydroxy-1-naphthyl)-1,3-dihydroisobenzofuran-1-one
3,3-Bis(4-hydroxynaphthalen-1-yl)-2-benzofuran-1-one
Di-p-a-Naphtholphthalide
3,3-Bis(4-hydroxy-1-naphtyl)isobenzofuran-1(3H)-one
3,3-Bis(4-hydroxy-1-naphtyl)phthalide
4,4'-[3(1H)-Oxoisobenzofuran-1,1-diyl]bis(1-naphthol) | [EINECS(EC#)]
209-875-5 | [Molecular Formula]
C28H18O4 | [MDL Number]
MFCD00036202 | [Molecular Weight]
418.44 | [MOL File]
596-01-0.mol |
| Chemical Properties | Back Directory | [Appearance]
pink to beige or brown fine crystalline powder | [Melting point ]
238-240 °C(lit.) | [Boiling point ]
496.21°C (rough estimate) | [density ]
1.1532 (rough estimate) | [vapor density ]
14.44 (vs air) | [refractive index ]
1.6400 (estimate) | [storage temp. ]
Store below +30°C. | [solubility ]
Solubility Practically insoluble in water; soluble in ethanol | [form ]
Powder | [pka]
8.0, 8.2, 8.5(at 25℃) | [color ]
Pink to beige or brown | [Odor]
Characteristic odour | [PH]
pH : 7.1～8.7 | [PH Range]
7.1(brownish)-8.3(blue/green) | [Water Solubility ]
Soluble in ethanol. Insoluble in water. | [λmax]
648nm | [Merck ]
14,6389 | [BRN ]
97816 | [InChIKey]
HQHBAGKIEAOSNM-UHFFFAOYSA-N | [CAS DataBase Reference]
596-01-0(CAS DataBase Reference) |
| Safety Data | Back Directory | [Hazard Codes ]
Xi | [Risk Statements ]
R36/37/38:Irritating to eyes, respiratory system and skin . | [Safety Statements ]
S26:In case of contact with eyes, rinse immediately with plenty of water and seek medical advice .
S36:Wear suitable protective clothing . | [WGK Germany ]
3
| [HS Code ]
32041900 |
| Hazard Information | Back Directory | [Chemical Properties]
pink to beige or brown fine crystalline powder | [Uses]
alpha-Naphtholphthalein is used in preparation of epoxy resin compound, preparing, laminated board, printed circuit board, and cured product with high heat resistance and flame retardancy. | [Uses]
As indicator in 0.1% or 0.04% solution in alcohol. pH 7.3 colorless to reddish; 8.7 greenish to blue. Particularly adapted for weak acids in strong alcoholic solution. |
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