1-Naphthol
1-Naphthol (CAS 90-15-3, C10H7OH) is an organic compound with a molecular weight of 144.17 g/mol. This aromatic hydroxyl compound appears as a solid and serves as a crucial building block in organic synthesis. Its applications span various chemical processes, including the production of dyes, agrochemicals, and pharmaceuticals. 1-Naphthol is also utilized in biochemical research as a substrate for enzyme assays, particularly in cell biology studies.
- IUPAC
- α-Naphthol,1-Hydroxynaphthalene
- Synonyms
- 1-Naphtholα-Naphthol1-Hydroxynaphthalene

Dye Intermediate
1-Naphthol is a key intermediate in the synthesis of various azo dyes and pigments, contributing to a wide range of colourants used in textiles and other industries.
Agrochemical Synthesis
It serves as a precursor in the manufacture of certain pesticides and herbicides, playing a role in crop protection chemistry.
Pharmaceutical Precursor
The compound is employed in the synthesis of active pharmaceutical ingredients (APIs) and drug intermediates, leveraging its reactive hydroxyl group.
Biochemical Research
Used as a substrate in enzymatic assays, such as in determining enzyme activity or in cell biology research related to enzyme function.
Organic Synthesis Building Block
Its naphthol structure makes it a versatile building block for constructing more complex organic molecules in academic and industrial research.
| Molecular weight | 144.17 |
|---|---|
| Linear formula | C10H7OH |
| Assay | ≥99% |
| Boiling point | 278-280 °C(lit.) |
| Solubility | ethanol: soluble1 M, clear |
| Vapour pressure | 1 mmHg (94 °C) |
| Vapour density | 4.5 (120 °C, vs air) |
| Melting point | 94-96 °C(lit.) |
| Autoignition temp | 1007 °F |
| Impurities tested | ≤0.0005% Phosphorus (P)≤0.1% Insoluble matter |


Hazard statements
- H302Harmful if swallowed
- H312Harmful in contact with skin
- H315Causes skin irritation
- H318Causes serious eye damage
- H335May cause respiratory irritation
Precautionary statements
- P261Avoid breathing dust, fume, gas or vapours
- P280Wear protective gloves, clothing and eye/face protection
- P305IF IN EYES
| Protective equipment | dust mask type N95 (US), Eyeshields, Faceshields, Gloves |
|---|---|
| Flash point | 125 °C / 257 °F |
| Transport (UN / ADR) | UN 2811 6.1 / PGIII |
| Water hazard class (WGK, DE) | 1 |
| Hazard codes (EU) | Xn |
| Risk statements (R) | 21/22-37/38-41 |
| Safety statements (S) | 22-26-37/39 |
| Cation traces | Al: ≤0.0005%Ca: ≤0.0005%Cu: ≤0.0005%Fe: ≤0.0005%K: ≤0.005%Mg: ≤0.0005%Na: ≤0.005%Pb: ≤0.001%Zn: ≤0.0005% |
| Anion traces | sulfate (SO42-): ≤0.05% |
| Ignition residue | ≤0.1% |
Hazard information is provided for guidance. Always consult the product Safety Data Sheet (SDS), available on request, before handling.
| Expl Lim | 5 % |
|---|---|
| Gene Information | human ... CYP1A2(1544) |
| Fluorescence | λex 300 nm; λem 472 nm (Borax buffer) |
Documentation
Every batch ships with a Certificate of Analysis covering assay, identity and purity; the grade is confirmed against your enquiry. Safety Data Sheets and technical data sheets are available on request.
Supply & logistics
Samples for technical evaluation; bulk MOQ by grade and packaging. In-stock material ships in 7–10 working days, worldwide, with full export documentation.
What is 1-Naphthol primarily used for?
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1-Naphthol is primarily used as an intermediate in the synthesis of dyes, agrochemicals, and pharmaceuticals. It also finds application in biochemical research and as a general building block in organic synthesis.
What is the CAS number and chemical formula for 1-Naphthol?
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The CAS number for 1-Naphthol is 90-15-3, and its chemical formula is C10H7OH.
What grade and purity does Tech Serve Solutions supply for 1-Naphthol?
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Tech Serve Solutions supplies 1-Naphthol with an assay of ≥99%. This product is suitable for research and technical applications. We do not represent this product as USP, BP, or EP grade unless explicitly stated.
How should 1-Naphthol be handled safely?
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1-Naphthol is classified with Danger signal word and poses hazards including H302 (Harmful if swallowed), H312 (Harmful in contact with skin), H315 (Causes skin irritation), H318 (Causes serious eye damage), and H335 (May cause respiratory irritation). Appropriate personal protective equipment, including a dust mask (type N95 US), eyeshields, face shields, and gloves, must be used. Ensure adequate ventilation and avoid breathing dust.
How is 1-Naphthol packed, shipped, and exported by TSS?
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Tech Serve Solutions expertly packs, ships, and exports 1-Naphthol globally, adhering to all relevant transport regulations. Specific packaging details are available upon request.
How can I request a sample or quote for 1-Naphthol?
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To request a sample or a quote for 1-Naphthol, please contact our sales team through the website or provide your details via the product inquiry form.
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