Name | 2-Naphthol |
Synonyms | 2-naftol c.i.37500 2-naphtol 2-naftolo b-naphtol 2-Naphthol developera C.I. 37500 Developer A betanaphthol Developer BN developerams Developer AMS beta naphthol beta-naphthol c.i.developer5 antioxygene bn naphthalen-2-ol C.I. Developer 5 azogendevelopera azogen developer a 2-hydroxynaphthalene beta-monoxynaphthalene azoiccouplingcomponent1 c.i.azoiccouplingcomponent1 C.I. Azoic coupling component 1 |
CAS | 135-19-3 |
EINECS | 205-182-7 |
InChI | InChI=1/C10H8O/c11-10-6-5-8-3-1-2-4-9(8)7-10/h1-7,11H |
InChIKey | JWAZRIHNYRIHIV-UHFFFAOYSA-N |
Molecular Formula | C10H8O |
Molar Mass | 144.17 |
Density | 1,28 g/cm3 |
Melting Point | 120-122°C(lit.) |
Boling Point | 285-286°C(lit.) |
Flash Point | 153 °C |
Water Solubility | 1 g/L (20 ºC) |
Solubility | 1g dissolved in 1000ml of water, 80ml of boiling water, 0.8ml of ethanol, 17ml of chloroform and 1.3ml of ether. Soluble in glycerin, olive oil and sodium hydroxide solution |
Vapor Presure | 10 mm Hg ( 145.5 °C) |
Vapor Density | 4.97 (vs air) |
Appearance | White or extremely light yellow crystalline powder or thin fragments |
Color | White |
Maximum wavelength(λmax) | ['226nm, 265nm, 275nm, 286nm, 320nm, 331nm'] |
Merck | 14,6384 |
BRN | 742134 |
pKa | 9.51(at 25℃) |
Storage Condition | Store below +30°C. |
Stability | Stable. Combustible. Dust may form explosive mixture with air. Incompatible with strong oxidizing agents, phenol. |
Sensitive | Sensitive to light |
Refractive Index | 1.5762 (estimate) |
MDL | MFCD00004067 |
Physical and Chemical Properties | Whitish fragments or white powders. melting point 123~124 ℃ boiling point 285~286 ℃ relative density 1.28g/cm3 flash point 161 ℃ solubility insoluble in water, soluble in ethanol, ether, chloroform, glycerol and alkali solution. |
Use | For the preparation of tocinic acid, J acid, 2.3-acid, and for the preparation of antioxidant butyl, antioxidant DNP and its antioxidant, organic pigments and fungicides |
Risk Codes | R20/22 - Harmful by inhalation and if swallowed. R50 - Very Toxic to aquatic organisms |
Safety Description | S24/25 - Avoid contact with skin and eyes. S61 - Avoid release to the environment. Refer to special instructions / safety data sheets. |
UN IDs | UN 3077 9/PG 3 |
WGK Germany | 2 |
RTECS | QL2975000 |
FLUKA BRAND F CODES | 8 |
TSCA | Yes |
HS Code | 29071590 |
Hazard Class | 9 |
Packing Group | III |
Toxicity | LD50 orally in Rabbit: 1960 mg/kg LD50 dermal Rabbit > 10000 mg/kg |
white shiny flakes or white powder. Density 1.28g/cm3. The melting point was 123-124 °c. Boiling point 285~286 deg C. Flash point 161 °c. Flammable. The color gradually becomes darker when stored for a long time and is stable in the air, but the color gradually becomes darker when exposed to sunlight. Heat sublimation, irritating smell of phenol. Insoluble in water, soluble in ethanol, ether, chloroform, glycerol and alkali solution.
purified naphthalene was sulfonated with 98% sulfuric acid to separate B Naphthalene sulfonic acid, which was formed into a sodium salt with sodium sulfite. After alkali fusion, B- naphthol sodium is obtained, and then B- naphthol is acidified with sulfuric acid. After boiling, washing with water, drying and distilling, B- naphthol is refined.
important organic raw materials and dye intermediates, used in the manufacture of tocinic acid, butyric acid, B naphthol -3-formic acid, and used in the manufacture of antioxidant butyl, antioxidant DNP and other antioxidant, organic Pigments and fungicides.