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MOSINTER GROUP LIMITED
MOSINTER GROUP LIMITED

China Β-Naphthol CAS 135-19-3 antioxygene bn azogen developer a azogendevelopera manufacturer

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Β-Naphthol CAS 135-19-3 antioxygene bn azogen developer a azogendevelopera 

Payment Terms: T/T,L/C,WU 
Place of Origin: Shandong, China (Mainland) 
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Product Detail

Means of Transport: Ocean,Land,Air
Packing: According to customer requi...
Brand Name: MOSINTER
Molecular formula: C10H8O
Melting point: 120-122 °C(lit.)
Density: 1,28 g/cm3
Flashing point: 153 °C
Storage condition: Refrigerator
Production Capacity: 2000 Ton/Year
Delivery Date: Within 7 days
CAS No.: 135-19-3
Molecular weight: 144.17
Vapor density: 4.97 (vs air)
Vapour pressure: 10 mm Hg ( 145.5 °C)
Boiling point: 285-286 °C(lit.)
soluble: 1 g/L (20 ºC)

It is an isomer of1-naphthol, differing by the location of the hydroxyl group on the naphthalene ring.

Β-Naphthol (CAS: 135-19-3)


Item

Index

Appearance

Off-white flakes or powder

Melting point

≥ 120

Mass   fraction of 2-Naphthol /%:

≥ 99.1

Mass   fraction of 1-Naphthol /%:

≤ 0.3

Mass   fraction of naphthalene/%:

≤ 0.1

Mass   fraction of 2,2-binaphthol/%:

≤ 0.2

Mass   fraction of Moisture/%:

≤ 0.1

2-Naphthol, or β-naphthol, is a fluorescent colorless crystalline solid with the formula C10H7OH. It is an isomer of1-naphthol, differing by the location of the hydroxyl group on the naphthalene ring. The naphthols are naphthalene homologues of phenol, but more reactive. Both isomers are soluble in simple alcohols, ethers, and chloroform. 2-Naphthol is a widely used intermediate for the production of dyes and other compounds.

Production

Traditionally, 2-naphthol is produced by a two-step process that begins with the sulfonation of naphthalene in sulfuric acid:

C10H8 + H2SO4 → C10H7SO3H + H2O

The sulfonic acid group is then cleaved in molten sodium hydroxide:

C10H7(SO3H) + 3 NaOH → C10H7ONa + Na2SO3 + 2 H2O

Neutralization of the product with acid gives 2-naphthol.

2-Naphthol can also be produced by a method analogous to the cumene process.

Applications

Dyes

The Sudan dyes are popular dyes noted for being soluble in organic solvents. Several of the Sudan dyes are derived from 2-naphthol by coupling with diazonium salts. Sudan dyes I -IV and Sudan Red G consist of arylazo-substitutednaphthols.

Precursor to BINOL

They can be also used in the production of dyes and in organic synthesis. For example, 2-naphthol reacts to form BINOL.

Safety

Naphthols (both 1 and 2 isomers) are used as biomarkers for livestock and humans exposed to polycyclic aromatic hydrocarbons.

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Company Info

MOSINTER GROUP LIMITED [China (Mainland)]

Offline Showroom in USA

Business Type:Manufacturer, Trading Company
City: Ningbo
Province/State: Zhejiang
Country/Region: China (Mainland)

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