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Cas Database

Name	2-naphthaldehyde	EINECS	200-640-2
CAS No.	66-99-9	Density	1.155 g/cm³
PSA	17.07000	LogP	2.65230
Solubility	Soluble in hot water.	Melting Point	58-61 °C(lit.)
Formula	C₁₁H₈O	Boiling Point	299.5 °C at 760 mmHg
Molecular Weight	156.184	Flash Point	179.5 °C
Transport Information	N/A	Appearance	Pink crystalline
Safety	22-24/25-36-26	Risk Codes	36/37/38-22
Molecular Structure		Hazard Symbols	Xn,Xi
Synonyms	2-Naphthaldehyde(8CI);2-Formylnaphthalene;2-Naphthalenealdehyde;2-Naphthylcarboxaldehyde;NCR 1;NCR 1 (aldehyde);NSC 8557;Naphthalene-2-carbaldehyde;b-Formylnaphthalene;b-Naphthaldehyde;b-Naphthylcarboxaldehyde;2-Naphthalenecarboxaldehyde;	Article Data	331

2-naphthaldehyde Synthetic route

: 1592-38-7
2-Naphthalenemethanol

: 66-99-9
β-naphthaldehyde

Conditions

Conditions	Yield
With dimethyl selenoxide In benzene for 5h; Heating;	100%
With dinitrogen monoxide; dioxo(tetramesitylporphyrinato)ruthenium(VI) In 1,2-dichloro-ethane at 120℃; under 7500.6 Torr; for 9h;	100%
With 1-hydroxy-3H-benz[d][1,2]iodoxole-1,3-dione In tert-butyl alcohol for 1h; Reflux;	100%

: 4469-45-8
2-(naphthalen-2-yl)-1,3-dioxolane

: 66-99-9
β-naphthaldehyde

Conditions

Conditions	Yield
With ammonium cerium(IV) nitrate In methanol; water at 20℃; for 0.166667h; Ring cleavage;	100%
With dimethylboron bromide In dichloromethane; 1,2-dichloro-ethane at -78℃; for 1h;	95%
With dimethylboron bromide; sodium hydrogencarbonate 1) CH2Cl2, -78 deg C, 1h, 2) THF, 5 min; Yield given. Multistep reaction;
With Pyrene-1-carboxylic acid; C33H22NO4(1-)*Na(1+) In dimethylsulfoxide-d6; water-d2 at 85℃; for 6h; Reagent/catalyst;	73 %Spectr.

: 77853-39-5
2-(naphthalen-2-yl)-1,3-dithiolane

: 66-99-9
β-naphthaldehyde

Conditions

Conditions	Yield
With tetrafluoroboric acid; mercury(II) oxide In tetrahydrofuran Ambient temperature;	100%
With tetrafluoroboric acid; mercury(II) oxide In tetrahydrofuran Product distribution; Ambient temperature; various 1,3-dithiolanes;	100%
With K-10 clay supported copper(II) nitrate trihydrate In dichloromethane for 6h; Ambient temperature; with K-10 clay-supported iron(III) nitrate nonahydrate;	99.6%
With K-10 clay supported copper(II) nitrate trihydrate In dichloromethane for 6h; Ambient temperature; K-10 clay supported iron(III) nitrate nonahydrate;	99.6%
With indium (III) iodide; dihydrogen peroxide In water; toluene at 20℃; for 15h; Inert atmosphere; Sealed tube;	86 mg

: 64002-54-6
diacetoxy(2-naphthyl)methane

: 66-99-9
β-naphthaldehyde

Conditions

Conditions	Yield
With H6P2W18O62 In toluene at 100℃; for 0.0833333h;	100%
With rice husk supported FeCl3 nanoparticles In ethanol at 70℃; for 0.166667h;	95%
With ethanol at 50 - 60℃; for 0.166667h;	94%

: 57009-73-1
2-(naphthalen-2-yl)-1,3-dithiane

: 66-99-9
β-naphthaldehyde

Conditions

Conditions	Yield
With dihydrogen peroxide; tantalum pentachloride; sodium iodide In water; ethyl acetate at 20℃; for 24h;	100%
With iron(III)-acetylacetonate; dihydrogen peroxide; sodium iodide In water; ethyl acetate at 20℃; for 1.3h;	98%
Stage #1: 2-(naphthalen-2-yl)-1,3-dithiane With acetyl chloride; sodium nitrite In dichloromethane at 0 - 5℃; for 0.25h; Stage #2: With water In dichloromethane at 0 - 20℃; for 0.5h;	96%

: 939-26-4
2-bromomethylnaphthyl bromide

: 66-99-9
β-naphthaldehyde

Conditions

Conditions	Yield
With dipotassium hydrogenphosphate; dimethyl selenoxide In 1,2-dichloro-ethane for 6h; Heating;	98%
With pyridine N-oxide; silver(l) oxide In acetonitrile at 25℃;	95%
With hexamethylenetetramine; water; sodium dodecyl-sulfate; lanthanum(lll) triflate at 100℃; for 1.5h; Sommelet Aldehyde Synthesis; Green chemistry;	94%

: 2506-41-4
1-chloromethylnaphthalene

: 66-99-9
β-naphthaldehyde

Conditions

Conditions	Yield
With dipotassium hydrogenphosphate; Potassium benzeneselenite; dibenzo-18-crown-6 In acetonitrile for 5h; Heating;	98%
With bismuth(III) nitrate; tetrabutyl ammonium fluoride at 100℃; for 3.5h;	90%
With 4Na(1+)6H(1+)NiMo6O24(10-)=Na4H6NiMo6O24; oxygen In water; acetonitrile at 20℃; under 760.051 Torr; for 12h; Irradiation;	90%

: 77196-31-7
2-(dimethoxymethyl)naphthalene

: 66-99-9
β-naphthaldehyde

Conditions

Conditions	Yield
With water In acetonitrile for 0.333333h; UV-irradiation;	98%
With dimethylboron bromide; sodium hydrogencarbonate 1) CH2Cl2, -78 deg C, 1h, 2) THF, 5 min; Yield given. Multistep reaction;

: 827-54-3
2-Vinylnaphthalene

: 66-99-9
β-naphthaldehyde

Conditions

Conditions	Yield
With sodium periodate; C53H44As2N2O3Ru In water; ethyl acetate; acetonitrile at 25℃; for 0.5h;	98%
With oxygen; palladium diacetate; toluene-4-sulfonic acid In water at 100℃; under 6080.41 Torr; for 24h; Autoclave;	88%
With sodium periodate In water; ethyl acetate; acetonitrile at 0℃; for 3h;	87%

: 1448723-24-7
N,N-(naphthalene-2-carbonyl)tosylhydrazide

: 66-99-9
β-naphthaldehyde

Conditions

Conditions	Yield
Stage #1: N,N-(naphthalene-2-carbonyl)tosylhydrazide With 1-(Trimethylsilyl)imidazole In toluene at 55℃; for 6h; Inert atmosphere; Stage #2: With citric acid In methanol; toluene at 20℃; for 1h; Reagent/catalyst; Temperature; Inert atmosphere;	98%

2-naphthaldehyde Chemical Properties

The Molecular Structure of 2-naphthaldehyde (CAS NO.66-99-9):

Empirical Formula: C₁₁H₈O
Molecular Weight: 156.1806
Density:1.155 g/cm³
Melting point: 58-61 ^°C(lit.)
Boiling point: 299.5^°C at 760 mmHg
Flash point: 179.5 ^°C
FreezingPoint: 1.0755
Sensitive: Air Sensitive
Index of Refraction: 1.675
Molar Refractivity: 50.84 cm³
Surface Tension: 48.1 dyne/cm
Enthalpy of Vaporization: 53.95 kJ/mol
Vapour Pressure: 0.00119 mmHg at 25^°C
Appearance: Pink crystalline
IUPAC: naphthalene-2-carbaldehyde
Synonyms: 2-Naphthaldehyde ; 2-Formylnaphthalene ; 2-Naphthalenecarboxaldehyde ; 4-07-00-01288 (Beilstein Handbook Reference) ; BRN 0507750 ; EINECS 200-640-2 ; beta-Formylnaphthalene ; beta-Naphthaldehyde ; beta-Naphthylaldehyde ; beta-Naphthylcarboxaldehyde ; 2-Naphthalenecarboxaldehyde ; 2-Naphthalenecarboxaldehyde (9CI)

2-naphthaldehyde Uses

2-naphthaldehyde (CAS NO.66-99-9) can be used in organic synthesis.

2-naphthaldehyde Production

Which leads to the dry anhydrous hydrogen chloride, and anhydrous tin dichloride, a mixture of ether, to saturation, after adding 2 - naphthyl nitrile solution of ethyl ether, and then pass into the hydrogen chloride to saturation, and aldimine generated yellow tin tetrachloride network adduct. The complex with the steam distillation, from the distillate filter out the white solid product, namely, crude 2 - naphthalene formaldehyde, after vacuum distillation, was pure, the yield of about 70% .

2-naphthaldehyde Toxicity Data With Reference

Organism	Test Type	Route	Reported Dose (Normalized Dose)	Effect	Source
mouse	LD50	unreported	1500mg/kg (1500mg/kg)		Farmaco, Edizione Scientifica. Vol. 19, Pg. 964, 1964.

LD50/LC50: RTECS: Not available.
Carcinogenicity: 2-Naphthaldehyde - Not listed as a carcinogen by ACGIH, IARC, NTP, or CA Prop 65.

2-naphthaldehyde Safety Profile

Hazard Codes: Harmful Xn Irritant Xi
Risk Statements: 36/37/38-22
R36/37/38: Irritating to eyes, respiratory system and skin
R22: Harmful if swallowed
Safety Statements: 22-24/25-36-26
S22: Do not breathe dust
S24/25: Avoid contact with skin and eyes
S36: Wear suitable protective clothing
S26: In case of contact with eyes, rinse immediately with plenty of water and seek medical advice
WGK Germany: 3
RTECS: QJ0190010
F: 10-23
HS Code: 29122900

2-naphthaldehyde Specification

It's stable under normal temperatures and pressures.
Conditions to Avoid: Incompatible materials.
Incompatibilities with Other Materials: Strong oxidizing agents, strong bases.
Hazardous Decomposition Products: Carbon monoxide, carbon dioxide.
Hazardous Polymerization: Has not been reported.

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