alpha-Naphtholphthalein CAS 596-01-0

Introduction：Basic information about alpha-Naphtholphthalein CAS 596-01-0, including its chemical name, molecular formula, synonyms, physicochemical properties, and safety information, etc.

alpha-Naphtholphthalein Basic information

• Product Name: alpha-Naphtholphthalein
• Synonyms: 1(3H)-Isobenzofuranone, 3,3-bis(4-hydroxy-1-naphthalenyl)-;à-naphtholphthalein;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
• CAS: 596-01-0
• MF: C28H18O4
• MW: 418.44
• EINECS: 209-875-5
• Product Categories: Titration;Phthalein;Industrial/Fine Chemicals;N;Stains and Dyes;Stains&Dyes, A to;Indicators;pH Indicators - Solids;pharmacetical;Analytical Chemistry;Indicator (pH);pH Indicators
• Mol File: 596-01-0.mol

alpha-Naphtholphthalein Chemical Properties

• Melting point: 238-240 °C(lit.)
• Boiling point: 496.21°C (rough estimate)
• bulk density: 350kg/m3
• 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
• pka: 8.0, 8.2, 8.5(at 25℃)
• form: Powder
• 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
• InChI: 1S/C28H18O4/c29-25-15-13-23(17-7-1-3-9-19(17)25)28(22-12-6-5-11-21(22)27(31)32-28)24-14-16-26(30)20-10-4-2-8-18(20)24/h1-16,29-30H
• InChIKey: HQHBAGKIEAOSNM-UHFFFAOYSA-N
• SMILES: O1C(c6c(cccc6)C1=O)(c4c5c(c(cc4)O)cccc5)c2c3c(c(cc2)O)cccc3
• CAS DataBase Reference: 596-01-0(CAS DataBase Reference)

Safety Information

• Hazard Codes: Xi
• Risk Statements: 36/37/38
• Safety Statements: 26-36
• WGK Germany: 3
• HS Code: 32041900
• Storage Class: 11 - Combustible Solids

alpha-Naphtholphthalein Usage And Synthesis

Chemical Properties

pink to beige or brown fine crystalline powder

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.

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.