2-nitroso-1-naphthol (beta-alpha)

Name	2-Nitroso-1-naphthol
Synonyms	C.I. 76610 Nitroso-1-napht 2-Nitroso-1-naphthol 2-Nitroiso-1-Naphthol C.I.Oxidation Base 15 1-Naphthol, 2-nitroso- 2-nitroso-1-naphthaleno 2-nitroso-1-Naphthalenol 2-nitrosonaphthalen-1-ol 1-Naphthalenol,2-nitroso- 2-nitrosonaphthalen-1-olate 1,2-NaphthoquinoneiMine-2-oxiMe 2-nitroso-1-naphthol (beta-alpha)
CAS	132-53-6
EINECS	205-064-5
InChI	InChI=1/C10H7NO2/c12-10-8-4-2-1-3-7(8)5-6-9(10)11-13/h1-6,12H/p-1

Molecular Formula	C10H7NO2
Molar Mass	173.17
Density	1.2427 (rough estimate)
Melting Point	150-155°C (dec.)(lit.)
Boling Point	303.81°C (rough estimate)
Flash Point	170.1°C
Water Solubility	SLIGHTLY SOLUBLE
Solubility	Soluble in methanol; ethanol; acetic acid; acetone, slightly soluble in ether; benzene; chloroform and carbon disulfide, insoluble in water.
Vapor Presure	1.31E-05mmHg at 25°C
Appearance	Yellow crystal
Color	Yellow needles from H2O or C6H6
Odor	Odorless
BRN	1867919
pKa	7.47±0.10(Predicted)
Storage Condition	RT, dark
Refractive Index	1.5200 (estimate)
MDL	MFCD00003932
Physical and Chemical Properties	Yellow needle-like crystals. Melting point 162-164 °c. Soluble in methanol, ethanol, acetic acid, acetone, slightly soluble in ether, benzene, chloroform and carbon disulfide, insoluble in water. Soluble in organic solvent leaf orange yellow, soluble in concentrated sulfuric acid is dark red, can be volatilized with water vapor.
Use	Used as a reagent for the determination of cobalt, palladium, copper and zirconium

Hazard Symbols	Xi - Irritant
Risk Codes	36/37/38 - Irritating to eyes, respiratory system and skin.
Safety Description	26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice.
WGK Germany	3
RTECS	QL4550000
FLUKA BRAND F CODES	8
Toxicity	LD orl-rat: >500 mg/kg NCNSA6 5,35,53

Soluble in organic solvent leaves orange yellow, soluble in concentrated sulfuric acid is dark red, can volatilize with water vapor.

Last Update：2022-10-16 17:13:23

NIST chemical information	Information provided by: webbook.nist.gov (external link)
EPA chemical information	Information provided by: ofmpub.epa.gov (external link)
use	used to determine cobalt, zirconium, copper, iron and palladium. It can also be used in organic synthesis. Used as a reagent for the verification of cobalt, palladium, copper and zirconium
production method	is obtained by nitrosation of 1-naphthol. 1. After nitrosation dissolves sodium hydroxide in water, 1-naphthol is added after stirring. Filter, keep the filtrate at 0-5 ℃, add drought sodium nitrite aqueous solution, add acetic acid slowly after adding. Then adjust the pH with 1:4 dilute hydrochloric acid so that the Congo red test paper is blue. Use starch potassium iodide test paper to control, continue stirring for half an hour, filter out the nitrate, wash the water until it is not acidic, and dry. 2. The nitrosation of the isomer is removed and 4-nitroso -1-naphthol is also generated. The potassium hydroxide can be removed by the following method. After dissolving potassium hydroxide in alcohol, dry nitrate is slowly added under stirring. At this time, the reaction temperature is kept at 60 ℃, after adding, stirring is continued for 10min. Cool, filter out the coarse product, add ethanol to soak, and filter. Finally refined to obtain the finished product.
toxic substance data	information provided by: pubchem.ncbi.nlm.nih.gov (external link)

Last Update：2024-04-10 22:29:15

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2-nitroso-1-naphthol (beta-alpha)

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