What is 2-Naphthol Crystals CAS 135-19-3?

2-Naphthol, also called Beta-Naphthol or 2-Hydroxynaphthalene, is a white to off-white crystalline aromatic alcohol with the formula C10H8O and molecular weight about 144.17 g/mol. It is a key organic intermediate used mainly in dyes, pigments, rubber antioxidants, and pharmaceutical synthesis.

What is the difference between 1-Naphthol and 2-Naphthol?

The difference is the position of the hydroxyl group on the naphthalene ring. 2-Naphthol is the more stable beta isomer and is produced in larger quantities for azo dyes and pigments, while 1-Naphthol is more reactive and more commonly used in agrochemicals and other specialized syntheses.

Why is 2-Naphthol used in rubber antioxidant production?

It provides the naphthalene building block for antioxidants such as phenyl-beta-naphthylamine, which protect rubber against thermo-oxidative aging. By incorporating 2-Naphthol, formulators improve heat aging resistance and extend the service life of rubber goods.

How should 2-Naphthol be stored and handled?

Store it in a cool, dry, well-ventilated area below about 30 degrees C, keep containers tightly sealed, and protect it from direct sunlight because the solid is light-sensitive. Use dust control and appropriate PPE because it can sublime when heated and is irritating to skin and eyes.

2-Naphthol Crystals CAS 135-19-3

2-Naphthol, also called Beta-Naphthol or 2-Hydroxynaphthalene, CAS 135-19-3, is a white crystalline aromatic alcohol supplied for dye, pigment, rubber antioxidant and pharmaceutical synthesis. Confirm the required grade and specification, then request a quotation with COA/TDS/SDS for bulk supply.

CAS: 135-19-3
Synonyms: Beta-Naphthol, 2-Hydroxynaphthalene, Isonaphthol, beta-Monohydroxynaphthalene, 2-Naphthalenol
Einecs: 205-182-7
Molecular Formula: C₁₀H₈O
Grade: Industrial / Technical Grade
Package: 25kg Kraft Paper Bag / 500kg Jumbo Bag (Palletized)

Request a quote

Share:

Product Description

2-Naphthol Crystals CAS 135-19-3 is a white to off-white crystalline aromatic alcohol, also known as Beta-Naphthol or 2-Hydroxynaphthalene, with molecular formula C10H8O, molecular weight about 144.17 and EINECS 205-182-7.

Synonyms: Beta-Naphthol; 2-Hydroxynaphthalene; Isonaphthol; beta-Monohydroxynaphthalene; 2-Naphthalenol.

CAS: 135-19-3.

It has the molecular formula C10H8O and a molecular weight of about 144.17 g/mol.

It appears as white to off-white crystals or crystalline flakes.

The hydroxyl group is at the beta position, making 2-Naphthol the more stable isomer, produced in larger quantities than 1-Naphthol.

It is a key intermediate for azo dyes and pigments, providing the naphthalene structure and coupling behavior.

It is a precursor for Tobias Acid, J-Acid and Gamma Acid, and a coupling component in azo dyes.

Downstream pigments include Lithol Red, Toluidine Red and Sudan dyes.

It provides the naphthalene building block for rubber antioxidants such as phenyl-beta-naphthylamine.

In pharmaceutical synthesis it serves as a starting material for selected active ingredients and intermediates.

The solid is light-sensitive and can sublime when heated, so it requires dust control and proper protection.

Store in a cool, dry, well-ventilated area below about 30 °C in tightly closed containers.

Protect from direct sunlight and keep containers sealed when not in use.

Confirm appearance, purity, melting point, moisture and grade as required.

Use dust control and suitable eye and skin protection during handling, and wash skin contact with soap and water.

Confirm packaging with the requested quantity and destination requirements.

The page is an RFQ entry point and does not state stock, price, MOQ or fixed lead time.

For an RFQ, state the intended application, required grade, specification, quantity, packaging, destination and document needs.

FAQ - Technical & Supply Chain

Q:
What is 2-Naphthol Crystals CAS 135-19-3?

A: 2-Naphthol, also called Beta-Naphthol or 2-Hydroxynaphthalene, is a white to off-white crystalline aromatic alcohol with the formula C10H8O and molecular weight about 144.17 g/mol. It is a key organic intermediate used mainly in dyes, pigments, rubber antioxidants, and pharmaceutical synthesis.
Q:
What is the difference between 1-Naphthol and 2-Naphthol?

A: The difference is the position of the hydroxyl group on the naphthalene ring. 2-Naphthol is the more stable beta isomer and is produced in larger quantities for azo dyes and pigments, while 1-Naphthol is more reactive and more commonly used in agrochemicals and other specialized syntheses.
Q:
Which dye and pigment intermediates are made from 2-Naphthol?

A: It is a precursor for Tobias Acid, J-Acid, and Gamma Acid, and a coupling component in azo dyes. Downstream pigments include Lithol Red, Toluidine Red, and Sudan dyes, which rely on 2-Naphthol for the naphthalene structure and coupling behavior.
Q:
Why is 2-Naphthol used in rubber antioxidant production?

A: It provides the naphthalene building block for antioxidants such as phenyl-beta-naphthylamine, which protect rubber against thermo-oxidative aging. By incorporating 2-Naphthol, formulators improve heat aging resistance and extend the service life of rubber goods.
Q:
How should 2-Naphthol be stored and handled?

A: Store it in a cool, dry, well-ventilated area below about 30 degrees C, keep containers tightly sealed, and protect it from direct sunlight because the solid is light-sensitive. Use dust control and appropriate PPE because it can sublime when heated and is irritating to skin and eyes.

Ordering & Documentation

Key information for document requests, quotations, and supply planning.

Documents

Tell us which documents your procurement team needs. Before an order, we will check whether the quoted source can provide them for the offered lot.

Quotation

Send the CAS number, grade, quantity, packing preference and destination.

Sample & Supply

Ask whether samples, trial quantities or repeat orders are possible. We will check each request against the sourced product and current offer.

Storage & Shipping

Product-specific conditions are confirmed before order.

Current Language

Change Language