LABOTEST-BB LT00068477
1-Nitroso-2-naphthol
CAS: 131-91-9
Molecular Formula: C10H7NO2
LABOTEST-BB LT00068477 - Names and Identifiers
| Name | 1-Nitroso-2-naphthol |
| Synonyms | C.I. 10000 CI NO 10005 zelenmoridlova4 1-Nitroso-2-phthol 1-Nitroso-2-naphthol α-Nitroso-β-nophthol LABOTEST-BB LT00068477 1-nitrosonaphthalen-2-ol 1-nitrosonaphthalen-2-olate 2-Hydroxy-1-nitrosonaphthalene 1-nitroso-2-naphthol (alpha-beta) |
| CAS | 131-91-9 |
| EINECS | 205-043-0 |
| InChI | InChI=1/C10H7NO2/c12-9-6-5-7-3-1-2-4-8(7)10(9)11-13/h1-6,12H/p-1 |
LABOTEST-BB LT00068477 - Physico-chemical Properties
| Molecular Formula | C10H7NO2 |
| Molar Mass | 173.17 |
| Density | 1.2427 (rough estimate) |
| Melting Point | 106-108 °C (dec.) (lit.) |
| Boling Point | 303.81°C (rough estimate) |
| Flash Point | 170.1°C |
| Water Solubility | insoluble |
| Solubility | Slightly soluble in water, soluble in ethanol, benzene, ether, carbon disulfide, caustic solution, carbon trichloride, carbon tetrachloride and other organic solvents, slightly soluble in cold petroleum ether. |
| Vapor Presure | 1.31E-05mmHg at 25°C |
| Appearance | Brown powder or solid |
| Color | tan to brown |
| Merck | 14,6641 |
| BRN | 776947 |
| pKa | 7.87±0.10(Predicted) |
| Storage Condition | Keep in dark place,Sealed in dry,Room Temperature |
| Sensitive | Thermal sensitivity |
| Refractive Index | 1.5200 (estimate) |
| MDL | MFCD00003884 |
| Physical and Chemical Properties | Orange-yellow patchy or prismatic crystals. Melting point 109.5 °c. Soluble in alcohol, ether, benzene, carbon tetrachloride, alkali and acetic acid, slightly soluble in cold petroleum ether, insoluble in water. Flammable, spontaneous combustion when the explosion, acid, alkali will soon spontaneous combustion. |
| Use | Used as an analytical reagent |
LABOTEST-BB LT00068477 - Risk and Safety
| Hazard Symbols | Xn - Harmful |
| Risk Codes | R22 - Harmful if swallowed R36/37/38 - Irritating to eyes, respiratory system and skin. R33 - Danger of cumulative effects R20/21/22 - Harmful by inhalation, in contact with skin and if swallowed. |
| Safety Description | S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S36 - Wear suitable protective clothing. S45 - In case of accident or if you feel unwell, seek medical advice immediately (show the label whenever possible.) |
| UN IDs | UN3077 |
| WGK Germany | 3 |
| RTECS | QL4725000 |
| FLUKA BRAND F CODES | 8 |
| TSCA | Yes |
| HS Code | 29089000 |
| Hazard Class | 9 |
| Packing Group | III |
| Toxicity | LDLo orl-rat: 500 mg/kg NCNSA6 5,35,53 |
LABOTEST-BB LT00068477 - Introduction
Used as a chromogenic agent for photometric determination of cobalt, palladium and zirconium. It is used as a co-precipitant for enrichment of Cr3, Co2, Fe2 and UO, and also as an extractant for Ag, Cd2, Co2, Cu2, Ni2 and Th4 plasma.
Last Update：2022-10-16 17:13:13
LABOTEST-BB LT00068477 - Reference Information
| color index | 10005 |
| NIST chemical information | Information provided by: webbook.nist.gov (external link) |
| EPA chemical information | Information provided by: ofmpub.epa.gov (external link) |
| use | the product can be sulfonated, diazotized and nitrated to obtain 6-nitro-2, 1-hydroxydiazonaphthalene-4-sulfonic acid. Also known as 6-nitro-1, 2-diazoxynaphthalene-4-sulfonic acid, it is an intermediate of acid vector black dyes. This product is a reagent for the determination of cobalt, palladium, copper and iron. Used as an analytical reagent Used as a chromogenic agent for photometric determination of cobalt, palladium and zirconium. It is used as a co-precipitant for enrichment of Cr3, Co2, Fe2 and UO, and also as an extractant for Ag, Cd2, Co2, Cu2, Ni2 and Th4 plasma. It is also used as an intermediate in organic synthesis. |
| production method | is obtained by nitrosation of β-naphthol. Stir β-naphthol and water sodium hydroxide to dissolve them. After cooling, add sodium nitrite, filter, cool the filtrate to below 0 ℃, under stirring, the temperature does not exceed 0 ℃, continuously add 10% hydrochloric acid drops until Congo red test paper turns blue. After stirring for 0.5h, filter, wash with water until the chloride ion is not greater than the chloride ion in tap water, then wash with distilled water and ethanol once, filter out crystallization, and then refine to obtain the finished product. |
Last Update：2024-04-09 15:16:47
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