1-Nitroso-2-naphthol

CAS NO.：131-91-9
Empirical Formula: C10H7NO2
Molecular Weight: 173.17
MDL number: MFCD00003884
EINECS: 205-043-0
SAFETY DATA SHEET (SDS)
Update Date: 2026-01-13 11:16:50

What is 1-Nitroso-2-naphthol?

Chemical properties

brown powder

The Uses of 1-Nitroso-2-naphthol

1-Nitroso-2-naphthol as a complexing agent for the on-line preconcentration of cobalt with FI-FAAS. 1-Nitroso-2-naphthol is the chelating ion-exchanger in the synthesis of alumina adsorbents that are of acidic, basic and neutral nature. It is used for the removal and preconcentration of Pb(II), Cu(II), Cr(III) from waste, as well as drinking water. It is also used in the preconcentration of cobalt using C(18) microcolumn with flow injection that is coupled to a flame atomic absorption spectrometry (FI-FAAS) system. 1-Nitroso-2-naphthol is used in the preparation of 1-nitroso-2-naphthol-sodium nitrite reagent.

The Uses of 1-Nitroso-2-naphthol

Organic synthesis, prevention of gum formation in gasoline, dye intermediate, analytical reagent.

What are the applications of Application

1-Nitroso-2-naphthol is a reagent for detection of tyrosine on chromatographic separation.

Definition

ChEBI: 1-Nitroso-2-naphthol is a member of naphthols.

Safety Profile

Moderately toxic by ingestion.Many nitroso compounds are carcinogens. Ignites whenheated to 124°C. Mutation data reported. When heated todecomposition it emits toxic fumes of NOx.

Purification Methods

Crystallise the naphthol from pet ether (b 60-80o, 7.5mL/g). [Beilstein 7 H 712, 7 IV 2419.]

Properties of 1-Nitroso-2-naphthol

Melting point:	106-108 °C (dec.) (lit.)
Boiling point:	303.81°C (rough estimate)
Density	1.2427 (rough estimate)
refractive index	1.5200 (estimate)
storage temp.	Keep in dark place,Sealed in dry,Room Temperature
form	crystalline
Colour Index	10005
pka	7.87±0.10(Predicted)
color	tan to brown
Water Solubility	insoluble
Merck	14,6641
BRN	776947
CAS DataBase Reference	131-91-9(CAS DataBase Reference)
NIST Chemistry Reference	2-Naphthalenol, 1-nitroso-(131-91-9)
EPA Substance Registry System	2-Naphthalenol, 1-nitroso- (131-91-9)

Safety information for 1-Nitroso-2-naphthol

Signal word	Warning
Pictogram(s)	Exclamation Mark Irritant GHS07
GHS Hazard Statements	H302:Acute toxicity,oral H315:Skin corrosion/irritation H319:Serious eye damage/eye irritation H335:Specific target organ toxicity, single exposure;Respiratory tract irritation
Precautionary Statement Codes	P261:Avoid breathing dust/fume/gas/mist/vapours/spray. P264:Wash hands thoroughly after handling. P264:Wash skin thouroughly after handling. P270:Do not eat, drink or smoke when using this product. P301+P312:IF SWALLOWED: call a POISON CENTER or doctor/physician IF you feel unwell. P302+P352:IF ON SKIN: wash with plenty of soap and water. P305+P351+P338:IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.