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131-91-9

Name 1-Nitroso-2-naphthol
CAS 131-91-9
EINECS(EC#) 205-043-0
Molecular Formula C10H7NO2
MDL Number MFCD00003884
Molecular Weight 173.17
MOL File 131-91-9.mol
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Chemical Properties

Appearance brown powder
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
Colour Index  10005
form  crystalline
pka 7.87±0.10(Predicted)
color  tan to brown
Water Solubility  insoluble
Merck  14,6641
BRN  776947
Uses
Organic synthesis, prevention of gum formation in gasoline, dye intermediate, analytical reagent.
CAS DataBase Reference 131-91-9(CAS DataBase Reference)
NIST Chemistry Reference 2-Naphthalenol, 1-nitroso-(131-91-9)
EPA Substance Registry System 131-91-9(EPA Substance)

Safety Data

Hazard Codes  Xn
Risk Statements 
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 Statements 
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 label where possible) .
RIDADR  UN3077
WGK Germany  3
RTECS  QL4725000
F  8
TSCA  Yes
HazardClass  9
PackingGroup  III
HS Code  29089000
Toxicity
LDLo orl-rat: 500 mg/kg NCNSA6 5,35,53

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