1-Nitroso-2-naphthol
Also known as: alpha-Nitroso-beta-naphthol, 1-Nitroso-2-naphthalenol, 2-Hydroxy-1-nitrosonaphthalene, C.I. 10005, Nitroso-β-naphthol, 1,2-Naphthoquinone 1-oxime, 1-Nitroso-2-hydroxynaphthalene
1-Nitroso-2-naphthol (CAS 131-91-9) is a compound in the Alcohols category listed in the Jingsj chemical database. It has the molecular formula C10H7NO2 and a molecular weight of 173.168 g/mol. Key properties include a melting point of 106-108 °C (dec.)(lit.), a boiling point of 357.6±25.0 °C at 760 mmHg, a density of 1.3±0.1 g/cm3 and a flash point of 170.1±23.2 °C. It is classified under GHS with signal word Warning and hazard statements H302 — Harmful if swallowed, H315 — Causes skin irritation and H319 — Causes serious eye irritation. It is listed by 2 suppliers, 1 of which publish reference prices, from 1.50 to 12.80 CNY. Record last updated Aug 21, 2026.
- CAS No.
- 131-91-9
- Jingsj CID
- J-24403-3
- Molecular Formula
- C10H7NO2
- Molecular Weight
- 173.168 g/mol
- Category
- Alcohols
- Last updated
- 8/21/2026
| Supplier | Purity / Pack | Base Price | Unit Price | Origin | |
|---|---|---|---|---|---|
In Stock | AR 100g | ¥150.00 | $0.22 /gBest ¥1.50/g CNY | CN China MOQ 100g | |
In Stock | AR 25g | ¥50.00 | $0.3 /g ¥2.00/g CNY | CN China MOQ 25g | |
In Stock | 96% 25g | ¥55.00 | $0.33 /g ¥2.20/g CNY | CN China MOQ 25g |
Physicochemical Properties
| Melting Point | 106-108 °C (dec.)(lit.) |
|---|---|
| Boiling Point | 357.6±25.0 °C at 760 mmHg |
| Density | 1.3±0.1 g/cm3 |
| Flash Point | 170.1±23.2 °C |
| Exact Mass | 173.047684 |
| PSA | 49.66000 |
| LogP | 2.42 |
| Vapor Pressure | 0.0±0.8 mmHg at 25°C |
| Refractive Index | 1.630 |
| Additional Property | insoluble |
GHS Safety & Compliance
- H302 — Harmful if swallowed
- H315 — Causes skin irritation
- H319 — Causes serious eye irritation
- H335 — May cause respiratory irritation
Customs & Trade Information
| HS Code | 2908999090 |
|---|---|
| Summary | 2908999090 halogenated, sulphonated, nitrated or nitrosated derivatives of phenols or phenol-alcohols。Supervision conditions:None。VAT:17.0%。Tax rebate rate:9.0%。MFN tariff:5.5%。General tariff:30.0% |
Frequently Asked Questions
What is the CAS number of 1-Nitroso-2-naphthol?
The CAS number of 1-Nitroso-2-naphthol is 131-91-9.
What are the molecular formula and molecular weight of 1-Nitroso-2-naphthol?
1-Nitroso-2-naphthol has molecular formula C10H7NO2 and molecular weight 173.168 g/mol.
Which suppliers offer 1-Nitroso-2-naphthol?
2 supplier(s) listed; reference unit price ¥1.50–12.80 /g.
Is 1-Nitroso-2-naphthol hazardous?
1-Nitroso-2-naphthol has GHS signal word Warning and hazard statements H302 — Harmful if swallowed; H315 — Causes skin irritation; H319 — Causes serious eye irritation.
What are the upstream and downstream products of 1-Nitroso-2-naphthol?
For 1-Nitroso-2-naphthol, Upstream Products: 2-Naphthol, 1,1'-Methylenedi-2-naphthol, Nitrous acid; Downstream Products: Phthalide-3-acetic acid, 2-[(E)-2-Carboxyvinyl]benzoic acid, 1-Nitro-2-naphthol.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "1-Nitroso-2-naphthol (CAS 131-91-9)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-24403-3 (accessed 2026-11-06).
Data for reference only; verify product details with suppliers before purchase.