70450

2-Naphthol

fluorescence indicator, ≥99.0%

• Synonym(s): β-Naphthol, 2-Hydroxynaphthalene
• Linear Formula: C₁₀H₇OH
• CAS Number: 135-19-3
• Molecular Weight: 144.17
• Beilstein/REAXYS Number: 742134
• EC Number: 205-182-7
• MDL number: MFCD00004067
• UNSPSC Code: 12171500
• PubChem Substance ID: 329762457
• NACRES: MA.02

Properties

• grade: fluorescence indicator
• Quality Level: 100
• vapor density: 4.97 (vs air)
• vapor pressure: 10 mmHg ( 145.5 °C)
• assay: ≥99.0% (GC); ≥99.0%
• form: solid
• impurities: ≤0.5% 1-naphthol
• ign. residue: ≤0.05%
• bp: 285-286 °C (lit.)
• mp: 120-122 °C (lit.); 121-122 °C
• fluorescence: λ_ex 320 nm; λ_em 410 nm in 0.1 M NaOH
• SMILES string: Oc1ccc2ccccc2c1
• InChI: 1S/C10H8O/c11-10-6-5-8-3-1-2-4-9(8)7-10/h1-7,11H
• InChI key: JWAZRIHNYRIHIV-UHFFFAOYSA-N
• Gene Information: human ... CYP1A2(1544)

Description

General description

2-Naphthol (2OH) is a hydroxyarene molecule, which when electronically excited forms strong acid. Excited 2OH dissociates only in water. It has a slight phenolic odor. It is incompatible with strong oxidizing agents, strong bases, acid chlorides and acid anhydrides. It is one of the most commonly used fluorescence dye.

Application

2OH has been used as a fluorescence indicator which changes fluorescence intensity at varied temperatures when embedded in aqueous Poly(vinly alcohol)/borax gel networks.

Safety Information

• pictograms: GHS05,GHS07,GHS09
• signalword: Danger
• hcodes: H302 + H332,H317,H318,H400
• pcodes: P273 - P280 - P301 + P312 - P302 + P352 - P304 + P340 + P312 - P305 + P351 + P338
• Hazard Classifications: Acute Tox. 4 Inhalation - Acute Tox. 4 Oral - Aquatic Acute 1 - Eye Dam. 1 - Skin Sens. 1
• Storage Class: 13 - Non Combustible Solids
• wgk_germany: WGK 2
• flash_point_f: 307.4 °F - closed cup
• flash_point_c: 153 °C - closed cup
• ppe: dust mask type N95 (US), Eyeshields, Gloves