Naphthalen-1-ol

Naphthalen-1-ol is an organic chemical compound with the molecular formula C10H8O and CAS number 90-15-3. It belongs to the class of naphthols, which are derivatives of naphthalene with a hydroxyl group attached. With a molecular weight of 144.17 g/mol, this aromatic compound is also known as 1-naphthol or α-naphthol and serves as an important intermediate in various chemical processes.

Naphthalen-1-ol appears as white to pale yellow crystalline solid at room temperature with a characteristic phenolic odor. It has moderate solubility in water but dissolves readily in organic solvents like ethanol, ether, and acetone. The compound has a melting point around 95-96°C and exhibits typical aromatic properties due to its naphthalene backbone structure combined with the polar hydroxyl functional group.

Naphthalen-1-ol serves as a key intermediate in the production of dyes, particularly azo dyes and sulfonic acid derivatives. It is widely used in the synthesis of pharmaceuticals, rubber antioxidants, and photographic chemicals. The compound also finds application in the manufacturing of perfumes, fungicides, and as a coupling agent in analytical chemistry for colorimetric determinations and chromatographic procedures.

Naphthalen-1-ol requires careful handling due to its Acute Tox. 4, Skin Irrit. 2, Eye Dam. 1, and STOT SE 3 classifications. Always wear appropriate personal protective equipment including chemical-resistant gloves, safety goggles, and protective clothing. Ensure adequate ventilation in work areas and avoid inhalation of dust or vapors. Handle in a well-ventilated area or fume hood to prevent exposure and potential health effects.

Naphthalen-1-ol should be stored in tightly closed containers in a cool, dry, and well-ventilated area away from direct sunlight and heat sources. Keep containers sealed to prevent contamination and moisture absorption. Store separately from incompatible materials such as strong oxidizing agents and acids. Maintain storage temperatures below 25°C and ensure proper labeling with hazard information for safe identification.

In case of skin contact with naphthalen-1-ol, immediately remove contaminated clothing and wash the affected area thoroughly with soap and water for at least 15 minutes. For eye contact, rinse immediately with plenty of clean water for at least 15 minutes and seek medical attention promptly due to the Eye Dam. 1 classification. If inhaled, move to fresh air immediately and seek medical advice if symptoms persist.

Naphthalen-1-ol waste must be disposed of in accordance with local, national, and international regulations as hazardous chemical waste. Do not discharge into drains, water bodies, or soil. Contact licensed waste disposal companies for proper treatment and disposal. Small quantities can be incinerated in approved facilities at high temperatures. Always consult current waste disposal regulations and safety data sheets before disposal.

Naphthalen-1-ol is classified under ADR as Class 6.1 (Toxic substances), Packing Group III, indicating moderate toxicity during transport. It must be packaged in appropriate containers meeting UN specifications and properly labeled with hazard markings. Transport vehicles must carry appropriate documentation and emergency information. Ensure packages are secured to prevent damage during transit and comply with dangerous goods transportation regulations.

Naphthalen-1-ol is subject to REACH regulation in Europe and must be registered for commercial use. It falls under CLP regulation with specific hazard classifications (Acute Tox. 4, Skin Irrit. 2, Eye Dam. 1, STOT SE 3) requiring appropriate labeling with GHS07 and GHS05 pictograms. However, it is not currently listed as a SVHC (Substance of Very High Concern) under REACH Annex XIV.

Naphthalen-1-ol is available through OYSI, a trusted European distributor of technical chemicals. As a specialized chemical distributor, OYSI provides high-quality naphthalen-1-ol with proper documentation including safety data sheets and certificates of analysis. Professional customers can contact OYSI for technical specifications, availability, and regulatory compliance support throughout Europe for their industrial and research applications.