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.

Which dye and pigment intermediates are made from 2-Naphthol?

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.

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 Crystals CAS 135-19-3 is a widely used aromatic organic intermediate chemically defined as 2-hydroxynaphthalene , functioning primarily as a key precursor in the synthesis of dyes, pigments, and rubber antioxidants. Also known as Beta-Naphthol or Isonaphthol, these white to slightly pink glossy flakes are utilized to manufacture Tobias Acid, J-Acid, and various azo dyes (such as Para Red and Sudan dyes). It also serves as a starting material for the fungicide 2-naphthoxyacetic acid and as an antioxidant stabilizer in polyolefins. We provide professional access to this material with competitive factory pricing and the ability to meet customized specifications (flakes or fused solid forms) for various manufacturing requirements. Our commitment to technical transparency ensures that every shipment is accompanied by comprehensive MSDS, TDS, COA documentation to support your quality assurance protocols, and we maintain capacity for consistent bulk supply to facilitate large-scale industrial operations.

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)

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Product Description

2-Naphthol (CAS 135-19-3), also known as Beta-Naphthol, is a vital organic intermediate characterized by white to off-white lustrous crystals or flakes. It serves as a fundamental building block in the chemical synthesis of dyestuffs, pigments, rubber antioxidants, and pharmaceutical compounds. Our product is manufactured using advanced catalytic processes to ensure high purity and low impurity profiles, meeting the stringent demands of international downstream manufacturers.

📧 Business Inquiry: For current pricing, MOQs, and COA, please contact our sales team directly: info@industrochem.com

1 Physicochemical Properties & Specification

2 Key Applications

3 Quality Assurance (QA/QC)

4 Storage, Handling & Safety

5 Logistics & Shipping

Physicochemical Properties & Specification

Standard: GB/T 26514-2011 (China National Standard for Export)

Test Item	Specification (Standard)
Appearance	White to off-white crystals or flakes
Purity (GC)	≥99.50%
Melting Point	120.0∘extC−122.0∘extC
1-Naphthol Content	≤0.30%
Insoluble Matter in Alkali	≤0.05%
Moisture / Volatile	≤0.20%
Ash Content	≤0.10%
Solubility	Soluble in ethanol, ether, chloroform; soluble in alkali solution.

Key Applications

Our 2-Naphthol Crystals are engineered for versatility across multiple high-value sectors:

1. Dyestuff & Pigment Industry This is the primary application. It is the precursor for Tobias Acid, J-Acid, and Gamma Acid. It serves as a coupling agent for azo dyes and is essential in producing pigments such as Lithol Red, Toluidine Red, and Sudan Red.

2. Rubber Industry Used extensively in the synthesis of rubber antioxidants, specifically PBN (Phenyl-beta-naphthylamine) and BN (Beta-naphthylamine), preventing aging and degradation in rubber products.

3. Pharmaceutical Intermediates Acts as a raw material for the synthesis of antiseptics, antifungal agents, and other pharmaceutical compounds.

4. Industrial & Agrochemicals Used in the production of tanning agents for leather, synthetic fragrances (such as methyl naphthyl ketone), and certain fungicides.

Quality Assurance (QA/QC)

We understand that consistency is critical for your production line. Our manufacturing facility operates under strict ISO 9001:2015 quality management systems.

Advanced Testing: Every batch is tested using High-Performance Liquid Chromatography (HPLC) and Gas Chromatography (GC) to verify purity and identify trace impurities (such as 1-Naphthol isomers).
Traceability: Full batch tracking is maintained from raw material input to final packaging. A comprehensive Certificate of Analysis (COA) accompanies every shipment.
Pre-Shipment Inspection: We support third-party inspections (SGS/BV/Intertek) at the buyer’s request to ensure transparency.

Storage, Handling & Safety

Storage Conditions

Store in a cool, dry, and well-ventilated warehouse.
Keep away from fire and heat sources. The storage temperature should not exceed $30^{\circ} e x t C$ 30∘extC.
Keep container tightly sealed. Store separately from oxidizers, acids, and edible chemicals to avoid cross-contamination.
Light sensitive; protect from direct sunlight.

Safety Instructions (PPE) 2-Naphthol is classified as an irritant and is toxic to aquatic life. Proper handling is mandatory:

Respiratory Protection: Wear a dust-proof respirator (N95 or higher) if dust is generated.
Eye Protection: Chemical safety goggles.
Skin Protection: Wear chemical-resistant gloves and protective clothing.
First Aid: In case of skin contact, wash off immediately with plenty of soap and water. If in eyes, rinse cautiously with water for several minutes.

Logistics & Shipping

Port of Loading: Shanghai, Qingdao, or Tianjin, China.
Lead Time: Ready stock usually ships within 7-10 days after order confirmation.
Documentation: Complete shipping documents provided, including MSDS, Packing List, Commercial Invoice, and Certificate of Origin.

Ready to optimize your supply chain? Get a competitive quote for high-purity 2-Naphthol Crystals today.

📧 Email: info@industrochem.com

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

COA, TDS, SDS/MSDS and packing details are available on request.

Quotation

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

Sample & Supply

Support is available for samples, trial orders, bulk and repeat supply.

Storage & Shipping

Product-specific conditions are confirmed before order.

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