Shandong Huashang Chemical Co., Ltd. is a high-tech enterprise focused on industry of fine chemicals research and develop, produce and sale. Shandong Huashang Chemical Co., Ltd. is located in Shan Dong Ji Nan China. we have the ability to provide you high quality products. More than 90 % of our products are exported to developed countries and regions such as north America, Europe, Japan, South Korea and the Middle East.
2-Naphthalenol
1. Basic Product Information
Product Name: 2-Naphthalenol
CAS Number: 135-19-3
Molecular Formula: C10H8O
Molecular Weight: 144.17
Synonyms: 2-Naphthol, β-Naphthol
Product Category: Aromatic phenolic fine chemical, dye intermediate, pigment raw material, organic synthesis reagent
2. Physical and Chemical Properties
Physical Indicators
- Appearance: White to pale pink crystalline flakes or powder
- Odor: Faint characteristic phenolic odor
- Solubility: Slightly soluble in cold water, soluble in hot water, ethanol, methanol, ether, chloroform, toluene; insoluble in petroleum ether
- Melting Point: 120–123 °C
- Boiling Point: 285–286 °C
- Density (20 °C): 1.22 g/cm3
- Hygroscopicity: Slightly hygroscopic under high humidity air
- Aqueous Stability: Stable in neutral water; dissolves and forms salt with alkaline liquor, easy to oxidize and turn dark in alkaline environment
Chemical Characteristics
- Molecular Structure: Naphthalene ring with hydroxyl group at β-position, phenolic hydroxyl group with strong reactivity
- Core Reactivity: Undergoes diazo coupling reaction with diazonium salts to synthesize azo dyes and pigments; can conduct esterification, etherification, halogenation and sulfonation modification
- Oxidation Tendency: Susceptible to air oxidation especially under alkaline and light conditions, turning pink then dark brown
- Photostability: Light-sensitive; long-term UV exposure accelerates oxidative discoloration
- Thermal Stability: Stable below 110 °C; sublimates above melting point, high-temperature decomposition releases irritant phenolic fumes
- Chemical Compatibility: Compatible with neutral and weak acidic solvents; incompatible with strong alkalis, heavy metal salts and strong oxidants
3. Main Application Fields
- Core Application: Azo Dye & Pigment Intermediate
Key coupling component for manufacturing acid dyes, direct dyes, solvent dyes and organic pigments, widely used in textile printing and coating industry - Rubber & Plastic Antioxidant Auxiliary
Mild antioxidant for rubber latex, plastic processing to delay material aging - Pharmaceutical Synthetic Intermediate
Raw material for anti-bacterial, anti-inflammatory and antiparasitic drug skeletons - Laboratory Analytical Reagent
Chromogenic agent for qualitative detection of nitrite, iron and other metal ions
4. Platform Category & Product Group Selection Guide
1) Domestic B2B Platform Category
Recommended Path: Organic Intermediates / Organic Intermediates
Reason: Classic naphthalene phenolic industrial intermediate mainly applied in dye and pigment production
2) English Product Group Dropdown Options
Recommended Selection: Basic Organic Chemicals
Do NOT select Pharmaceutical Chemicals; it is bulk industrial dye raw material rather than exclusive human pharmaceutical API
3. Standard Foreign Trade Packaging Specification
1kg aluminum foil vacuum bag for lab samples; 25kg woven bag lined with double PE inner bags for bulk factory orders; light-proof sealed packaging available
5. Quality Specification Table
| Test Item | Standard Requirement |
| CAS Number | 135-19-3 |
| Molecular Formula | C10H8O |
| Appearance | Uniform white crystalline flakes without dark brown impurities |
| GC Purity | Dye Grade ≥99.0%, Reagent Grade ≥99.5% |
| Melting Point | 120–123 °C |
| Water Content (KF Method) | ≤0.20% |
| 1-Naphthol Impurity | ≤0.10% |
| Total Related Substances | ≤0.40% |
| Heavy Metals (Pb) | ≤10 ppm |
| Standard Storage Package | Light-proof sealed PE lined woven bag, 25kg net weight |
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