alpha-Naphtholphthalein

Base Information

• Chemical Name: alpha-Naphtholphthalein
• CAS No.: 596-01-0
• Molecular Formula: C28H18O4
• Molecular Weight: 418.449
• Hs Code.: 32041900
• European Community (EC) Number: 209-875-5
• UNII: 2QEG1706NN
• DSSTox Substance ID: DTXSID70208273
• Nikkaji Number: J6.780F
• Wikipedia: Naphtholphthalein
• Wikidata: Q413919
• Mol file: 596-01-0.mol

Synonyms:naphtholphthalein

Chemical Property of alpha-Naphtholphthalein

Chemical Property:

• Appearance/Colour: pink to beige or brown fine crystalline powder
• Vapor Pressure: 1.44E-20mmHg at 25°C
• Melting Point: 238-240 °C(lit.)
• Refractive Index: 1.769
• Boiling Point: 705.599 °C at 760 mmHg
• PKA: 8.0, 8.2, 8.5(at 25℃)
• Flash Point: 247.012 °C
• PSA: 66.76000
• Density: 1.404 g/cm³
• LogP: 5.86650
• Storage Temp.: Store below +30°C.
• Solubility.: Solubility Practically insoluble in water; soluble in ethanol
• Water Solubility.: Soluble in ethanol. Insoluble in water.
• XLogP3: 6.3
• Hydrogen Bond Donor Count: 2
• Hydrogen Bond Acceptor Count: 4
• Rotatable Bond Count: 2
• Exact Mass: 418.12050905
• Heavy Atom Count: 32
• Complexity: 668

Purity/Quality:

98%, ^*data from raw suppliers

α-Naphtholphthalein ^*data from reagent suppliers

Safty Information:

• Pictogram(s): Xi
• Hazard Codes: Xi
• Statements: 36/37/38
• Safety Statements: 26-36

MSDS Files:

SDS file from LookChem

Total 1 MSDS from other Authors

Useful:

• Chemical Classes: Dyes -> Indicator Dyes
• Canonical SMILES: C1=CC=C2C(=C1)C(=CC=C2O)C3(C4=CC=CC=C4C(=O)O3)C5=CC=C(C6=CC=CC=C65)O
• 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. 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.

Technology Process of alpha-Naphtholphthalein

There total 9 articles about alpha-Naphtholphthalein which guide to synthetic route it. The literature collected by LookChem mainly comes from the sharing of users and the free literature resources found by Internet computing technology. We keep the original model of the professional version of literature to make it easier and faster for users to retrieve and use. At the same time, we analyze and calculate the most feasible synthesis route with the highest yield for your reference as below:

synthetic route:

Reference yield:

phthalic anhydride (85-44-9) + α-naphthol (90-15-3) → α-naphtholphthalein (596-01-0)

Guidance literature:

α-naphtholphthalein of melting point 253-255 degree;

Reference yield:

phthalic anhydride (85-44-9) + α-naphthol (90-15-3) → α-naphtholphthalein (596-01-0)

Guidance literature:

With zinc(II) chloride; at 100 ℃;

Reference yield:

α-naphthol (90-15-3) + Phthaloyl dichloride (88-95-9) → α-naphtholphthalein (596-01-0)

Guidance literature:

upstream raw materials:

phthalic anhydride

α-naphthol

Phthaloyl dichloride

sulfuric acid