ChemicalBook > CAS DataBase List > alpha-Naphtholphthalein

alpha-Naphtholphthalein

Product Name: alpha-Naphtholphthalein
CAS No.: 596-01-0
Chemical Name: alpha-Naphtholphthalein
Synonyms: NAPHTHOLPHTHALEIN;1-NAPHTHOLPHTHALEIN;1-naphthol quinone;ɑ-Naphtholphthalein;l-naphtholphthalein;à-naphtholphthalein;α-Naphtholphthalein;p-α-Naphtholphthalein;α-Naphtholphthalein>Naphtholphthalein blue
CBNumber: CB0451639
Molecular Formula: C28H18O4
Formula Weight: 418.44
MOL File: 596-01-0.mol

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alpha-Naphtholphthalein Property

Melting point:: 238-240 °C(lit.)
Boiling point:: 496.21°C (rough estimate)
Density: 1.1532 (rough estimate)
bulk density: 350kg/m3
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
PH Range: 7.1(brownish)-8.3(blue/green)
PH: pH : 7.1～8.7
Odor: Characteristic odour
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)

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Safety

Hazard Codes: Xi
Risk Statements: 36/37/38
Safety Statements: 26-36
WGK Germany: 3
HS Code: 32041900

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Hazard and Precautionary Statements (GHS)

Symbol(GHS)

Signal word

Warning

Hazard statements

H315Causes skin irritation

H319Causes serious eye irritation

H335May cause respiratory irritation

Precautionary statements

P261Avoid breathing dust/fume/gas/mist/vapours/spray.

P304+P340IF INHALED: Remove victim to fresh air and Keep at rest in a position comfortable for breathing.

P305+P351+P338IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.

P405Store locked up.

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N-Bromosuccinimide Price

Sigma-Aldrich

Product number: N8257
Product name: α-Naphtholphthalein
Purity: practical grade
Packaging: 1g
Price: $115.66
Updated: 2025/07/31

Sigma-Aldrich

Product number: N8257
Product name: α-Naphtholphthalein
Purity: practical grade
Packaging: 5g
Price: $381.1
Updated: 2025/07/31

Sigma-Aldrich

Product number: 1.06246
Product name: 1-Naphtholphthalein
Purity: indicator
Packaging: 1g
Price: $301
Updated: 2025/07/31

Sigma-Aldrich

Product number: 1.06246
Product name: 1-Naphtholphthalein
Purity: indicator
Packaging: 5G
Price: $342
Updated: 2025/07/31

Sigma-Aldrich

Product number: 1.06246
Product name: 1-Naphtholphthalein
Purity: indicator
Packaging: 100g
Price: $3010
Updated: 2025/07/31

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alpha-Naphtholphthalein Chemical Properties,Usage,Production

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.

alpha-Naphtholphthalein Preparation Products And Raw materials

Raw materials

Preparation Products

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alpha-Naphtholphthalein Suppliers

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View Lastest Price from alpha-Naphtholphthalein manufacturers

WUHAN FORTUNA CHEMICAL CO., LTD

Product: alpha-Naphtholphthalein 596-01-0
Price: US $0.00/KG
Min. Order: 1KG
Purity: 98%min
Supply Ability: 30tons/month
Release date: 2023-02-07

Hebei Chuanghai Biotechnology Co., Ltd

Product: alpha-Naphtholphthalein 596-01-0
Price: US $0.00-0.00/KG
Min. Order: 1KG
Purity: 99%
Supply Ability: 20 mt
Release date: 2024-12-11

Henan Fengda Chemical Co., Ltd

Product: alpha-Naphtholphthalein 596-01-0
Price: US $5.00-0.10/KG
Min. Order: 1KG
Purity: 98%
Supply Ability: g-kg-tons, free sample is available
Release date: 2024-03-27

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