Phenidone supplier | CasNO.92-43-3

Name
Phenidone
EINECS 202-155-1
CAS No. 92-43-3
Article Data24
CAS DataBase
Density 1.188 g/cm³
Solubility soluble in hot water
Melting Point 119-123 °C
Formula C₉H₁₀N₂O
Boiling Point 304.1 °C at 760 mmHg
Molecular Weight 162.191
Flash Point 137.7 °C
Transport Information UN 2811 6.1/PG 3
Appearance light beige powder or crystals
Safety 61
Risk Codes 22-51/53
Molecular Structure
Hazard Symbols Xn,N
Synonyms 2-Pyrazolin-3-ol,1-phenyl- (7CI);1-Phenyl-3-oxopyrazolidine;1-Phenyl-3-pyrazolidinone;1-Phenylpyrazolidine-3-one;Fenidon;
PSA 32.34000
LogP 1.32170

Synthetic route

: 59-88-1
phenylhydrazine hydrochloride

: 292638-85-8
acrylic acid methyl ester

: 92-43-3
1-phenylpyrazolidin-3-one

Conditions

Conditions	Yield
With sodium methylate In methanol; toluene at 30℃; Reflux;	75%
Stage #1: phenylhydrazine hydrochloride With sodium methylate In ethanol at 40℃; for 0.5h; Stage #2: acrylic acid methyl ester In ethanol Reflux;

: 3314-35-0
3-Amino-1-phenyl-2-pyrazoline

: 92-43-3
1-phenylpyrazolidin-3-one

Conditions

Conditions	Yield
With hydrogenchloride
With sulfuric acid
Multi-step reaction with 3 steps 2: LiAlH4 3: aqueous H2SO4 View Scheme

: 29522-26-7
ethyl-(1-phenyl-4,5-dihydro-1H-pyrazol-3-yl)-amine

: 92-43-3
1-phenylpyrazolidin-3-one

Conditions

Conditions	Yield
With sulfuric acid

: 41682-87-5
3-hydroxy-propionic acid-(N'-phenyl-hydrazide)

: 92-43-3
1-phenylpyrazolidin-3-one

Conditions

Conditions	Yield
With phosphoric acid
With toluene-4-sulfonic acid; xylene Abdestillieren des entstandenen H2O;

: 79-06-1
2-propenamide

: 100-63-0
phenylhydrazine

: 92-43-3
1-phenylpyrazolidin-3-one

Conditions

Conditions	Yield
With ethanol; sodium ethanolate

: 5883-17-0
N-ethyl-2-propenamide

: 100-63-0
phenylhydrazine

: 92-43-3
1-phenylpyrazolidin-3-one

Conditions

Conditions	Yield
With ethanol; sodium ethanolate

: 100-63-0
phenylhydrazine

: 6001-87-2
methyl 3-chloropropionate

: 92-43-3
1-phenylpyrazolidin-3-one

: 64-17-5
ethanol

: 141-52-6
sodium ethanolate

: 100-63-0
phenylhydrazine

: 140-88-5
ethyl acrylate

: 71-43-2
benzene

: 92-43-3
1-phenylpyrazolidin-3-one

...Expand

: 100-63-0
phenylhydrazine

: 140-88-5
ethyl acrylate

: 92-43-3
1-phenylpyrazolidin-3-one

Conditions

Conditions	Yield
With ethanol; sodium ethanolate; benzene
With triethylamine

: 26955-79-3
3-(N'-phenyl-hydrazino)-propionitrile

: 92-43-3
1-phenylpyrazolidin-3-one

Conditions

Conditions	Yield
With hydrogenchloride
Multi-step reaction with 2 steps 1: aqueous HCl 2: concentrated aqueous HCl View Scheme

: 100-63-0
phenylhydrazine

β-halogen-propionic acid ethyl ester: β-halogen-propionic acid ethyl ester

: 92-43-3
1-phenylpyrazolidin-3-one

Conditions

Conditions	Yield
With alkali

: 100-63-0
phenylhydrazine

β-halogen-propionic acid: β-halogen-propionic acid

: 92-43-3
1-phenylpyrazolidin-3-one

Conditions

Conditions	Yield
With water
With ethanol
With benzene

: 3-(N-phenyl-hydrazino)-propionic acid ethyl ester

A: 92-43-3
1-phenylpyrazolidin-3-one

B 1-phenyl-pyrazolone-(3): 1-phenyl-pyrazolone-(3)

Conditions

Conditions	Yield
With sodium ethanolate Behandeln mit Wasser und Essigsaeure;

: 64-17-5
ethanol

: 100-63-0
phenylhydrazine

β-halogensubstituted propionic acid: β-halogensubstituted propionic acid

: 92-43-3
1-phenylpyrazolidin-3-one

...Expand

: 7732-18-5
water

: 100-63-0
phenylhydrazine

β-halogensubstituted propionic acid: β-halogensubstituted propionic acid

: 92-43-3
1-phenylpyrazolidin-3-one

...Expand

: 100-63-0
phenylhydrazine

: 71-43-2
benzene

β-halogensubstituted propionic acid: β-halogensubstituted propionic acid

: 92-43-3
1-phenylpyrazolidin-3-one

...Expand

: 100-63-0
phenylhydrazine

ester of/the/ β-halogensubstituted propionic acid: ester of/the/ β-halogensubstituted propionic acid

alkali: alkali

: 92-43-3
1-phenylpyrazolidin-3-one

...Expand

: 29574-31-0
N-(1-phenyl-4,5-dihydro-1H-pyrazol-3-yl)-acetamide

: 92-43-3
1-phenylpyrazolidin-3-one

Conditions

Conditions	Yield
Multi-step reaction with 2 steps 1: LiAlH4 2: aqueous H2SO4 View Scheme

: 62750-11-2
ethyl 3-phenylaminopropionate

: 92-43-3
1-phenylpyrazolidin-3-one

Conditions

Conditions	Yield
Multi-step reaction with 3 steps 1: diluted hydrochloric acid; NaNO2 2: aluminium amalgam; diethyl ether 3: sodium ethylate / Behandeln mit Wasser und Essigsaeure View Scheme

: 99841-38-0
N-nitroso-N-phenyl-β-alanine ethyl ester

: 92-43-3
1-phenylpyrazolidin-3-one

Conditions

Conditions	Yield
Multi-step reaction with 2 steps 1: aluminium amalgam; diethyl ether 2: sodium ethylate / Behandeln mit Wasser und Essigsaeure View Scheme

: 62-53-3
aniline

: 92-43-3
1-phenylpyrazolidin-3-one

Conditions

Conditions	Yield
Multi-step reaction with 4 steps 1: 80 °C 2: diluted hydrochloric acid; NaNO2 3: aluminium amalgam; diethyl ether 4: sodium ethylate / Behandeln mit Wasser und Essigsaeure View Scheme
Multi-step reaction with 2 steps 1.1: hydrogenchloride; sodium nitrite / water / 0.33 h / Cooling with ice 1.2: 2 h / -10 - -5 °C 2.1: sodium methylate / ethanol; toluene / 16 h / 40 - 45 °C View Scheme
Multi-step reaction with 2 steps 1: sodium nitrite; tin(ll) chloride 2: toluene View Scheme

: 100-63-0
phenylhydrazine

: 92-43-3
1-phenylpyrazolidin-3-one

Conditions

Conditions	Yield
Multi-step reaction with 4 steps 1: sodium ethylate; ethanol 3: LiAlH4 4: aqueous H2SO4 View Scheme
Multi-step reaction with 2 steps 1: sodium ethylate; ethanol 2: aqueous H2SO4 View Scheme
Multi-step reaction with 2 steps 2: concentrated aqueous HCl View Scheme
Multi-step reaction with 3 steps 2: aqueous HCl 3: concentrated aqueous HCl View Scheme
Multi-step reaction with 2 steps 2: toluene-4-sulfonic acid; xylene / Abdestillieren des entstandenen H2O View Scheme

: 59-88-1
phenylhydrazine hydrochloride

: 140-88-5
ethyl acrylate

: 92-43-3
1-phenylpyrazolidin-3-one

Conditions

Conditions	Yield
Stage #1: ethyl acrylate With sodium methylate In ethanol; toluene at 40 - 45℃; for 1h; Stage #2: phenylhydrazine hydrochloride In ethanol; toluene at 45℃; for 15h;
With sodium methylate In ethanol; toluene at 40 - 45℃; for 16h;

: 64-17-5
ethanol

: 59-88-1
phenylhydrazine hydrochloride

: 92-43-3
1-phenylpyrazolidin-3-one

Conditions

Conditions	Yield
In toluene

: 92-43-3
1-phenylpyrazolidin-3-one

: 80335-74-6
N-cyclopentyl-O-benzoylhydroxylamine

: 1-[2-(cyclopentylamino)phenyl]-3-pyrazolidinone

Conditions

Conditions	Yield
With dichloro(pentamethylcyclopentadienyl)rhodium (III) dimer; cesium acetate; Trimethylacetic acid In toluene at 20℃; Catalytic behavior; Solvent; Temperature;	97%

: 88-12-0
1-ethenyl-2-pyrrolidinone

: 92-43-3
1-phenylpyrazolidin-3-one

: 1-(2-oxopyrrolidin-1-yl)-1-(5-oxo-2-phenylpyrazolidin-1-yl)ethane

Conditions

Conditions	Yield
With chloro-trimethyl-silane Heating;	96%

: 92-43-3
1-phenylpyrazolidin-3-one

: 858005-68-2
N-(4,4-diethoxybutyl)-4-methylbenzenesulfonylamide

: 1-phenyl-2-(1-tosylpyrrolidin-2-yl)pyrazolidin-3-one

Conditions

Conditions	Yield
With trifluoroacetic acid In benzene for 5h; Reflux;	96%

: 92-43-3
1-phenylpyrazolidin-3-one

: 23461-58-7
N-(4-(N-(4,4-diethoxybutyl)sulfamoyl)phenyl)acetamide

: N-(4-((2-(5-oxo-2-phenylpyrazolidin-1-yl)pyrrolidin-1-yl)sulfonyl)phenyl)acetamide

Conditions

Conditions	Yield
With trifluoroacetic acid In benzene for 5h; Reflux;	95%

: 92-43-3
1-phenylpyrazolidin-3-one

: 501-65-5
diphenyl acetylene

: 3-(2,3-diphenyl-1H-indol-1-yl)propanamide

Conditions

Conditions	Yield
With dichloro(pentamethylcyclopentadienyl)rhodium (III) dimer; palladium diacetate; sodium carbonate In 1,2-dichloro-ethane at 100℃; for 2h; Catalytic behavior; Reagent/catalyst; Solvent; Sealed tube;	94%
With [ruthenium(II)(η6-1-methyl-4-isopropyl-benzene)(chloride)(μ-chloride)]2; sodium acetate In chlorobenzene at 110℃; for 18h; Reagent/catalyst; Solvent; Schlenk technique; Inert atmosphere; regioselective reaction;	91%

: 92-43-3
1-phenylpyrazolidin-3-one

: 1208610-05-2
1-(p-phenylphenyl)oct-1-yne

: 3-(2-(biphenyl-4-yl)-3-hexyl-1H-indol-1-yl)propanamide

Conditions

Conditions	Yield
With [ruthenium(II)(η6-1-methyl-4-isopropyl-benzene)(chloride)(μ-chloride)]2; sodium acetate In chlorobenzene at 110℃; for 18h; Schlenk technique; Inert atmosphere; regioselective reaction;	93%

: 92-43-3
1-phenylpyrazolidin-3-one

: 1485-75-2
N-cyclohexyl-O-benzoylhydroxylamine

: 1-[2-(cyclohexylamino)phenyl]-3-pyrazolidinone

Conditions

Conditions	Yield
With dichloro(pentamethylcyclopentadienyl)rhodium (III) dimer; cesium acetate; Trimethylacetic acid In toluene at 20℃;	93%

: 92-43-3
1-phenylpyrazolidin-3-one

: 1510821-72-3
C17H24N2O4

: tert-butyl 4-{[2-(3-oxopyrazolidin-1-yl)phenyl]amino}piperidine-1-carboxylate

Conditions

Conditions	Yield
With dichloro(pentamethylcyclopentadienyl)rhodium (III) dimer; cesium acetate; Trimethylacetic acid In toluene at 20℃;	92%

: 92-43-3
1-phenylpyrazolidin-3-one

: 1008-79-3
1-phenyl-1,2-dihydro-pyrazol-3-one

Conditions

Conditions	Yield
With iron(III) chloride hexahydrate at 80℃;	91%
With trifluoro-N-(oxo-λ4-sulfanylidene)methanesulfonamide In dichloromethane at -30 - 20℃; Inert atmosphere;	80%
With tetrabutylammonium tetrafluoroborate In dichloromethane electrolysis;	21%

: 92-43-3
1-phenylpyrazolidin-3-one

: 7409-31-6
4-bromo-3-hydroxy-1-phenyl-1H-pyrazole

Conditions

Conditions	Yield
With hydrogen bromide; dihydrogen peroxide In chloroform; water at 60℃; for 0.5h; Green chemistry;	91%

: 92-43-3
1-phenylpyrazolidin-3-one

: 100-39-0
benzyl bromide

: 104573-72-0
2-benzyl-1-phenyl-3-pyrazolidinone

Conditions

Conditions	Yield
With sodium hydride In N,N-dimethyl-formamide	90%

: 92-43-3
1-phenylpyrazolidin-3-one

: 1129-65-3
(hex-1-yn-1-yl)benzene

: 3-(3-butyl-2-phenyl-1H-indol-1-yl)propanamide

Conditions

Conditions	Yield
With [ruthenium(II)(η6-1-methyl-4-isopropyl-benzene)(chloride)(μ-chloride)]2; sodium acetate In chlorobenzene at 110℃; for 18h; Schlenk technique; Inert atmosphere; regioselective reaction;	90%
With dichloro(pentamethylcyclopentadienyl)rhodium (III) dimer; palladium diacetate; sodium carbonate In 1,2-dichloro-ethane at 100℃; for 2h; Sealed tube; regioselective reaction;	85%

: 92-43-3
1-phenylpyrazolidin-3-one

: 1510821-71-2
C12H15NO3

: 1-{2-[(tetrahydro-2H-pyran-4-yl)amino]phenyl}-3-pyrazolidinone

Conditions

Conditions	Yield
With dichloro(pentamethylcyclopentadienyl)rhodium (III) dimer; cesium acetate; Trimethylacetic acid In toluene at 20℃;	90%

: 673-32-5
1-Phenylprop-1-yne

: 92-43-3
1-phenylpyrazolidin-3-one

: 64359-28-0
3-(3-methyl-2-phenyl-1H-indol-1-yl)propanamide

Conditions

Conditions	Yield
With [ruthenium(II)(η6-1-methyl-4-isopropyl-benzene)(chloride)(μ-chloride)]2; sodium acetate In chlorobenzene at 110℃; for 18h; Schlenk technique; Inert atmosphere; regioselective reaction;	89%
With dichloro(pentamethylcyclopentadienyl)rhodium (III) dimer; palladium diacetate; sodium carbonate In 1,2-dichloro-ethane at 100℃; for 2h; Sealed tube; regioselective reaction;	65%

: 92-43-3
1-phenylpyrazolidin-3-one

: 873-31-4
2-chlorophenylacetylene

: 3-(2-(2-chlorophenyl)-1H-indol-1-yl)propanamide

Conditions

Conditions	Yield
With [ruthenium(II)(η6-1-methyl-4-isopropyl-benzene)(chloride)(μ-chloride)]2; sodium acetate In chlorobenzene at 110℃; for 18h; Schlenk technique; Inert atmosphere; regioselective reaction;	89%

: 873-73-4
4-n-chlorophenylacetylene

: 92-43-3
1-phenylpyrazolidin-3-one

: 3-(2-(4-chlorophenyl)-1H-indol-1-yl)propanamide

Conditions

Conditions	Yield
With [ruthenium(II)(η6-1-methyl-4-isopropyl-benzene)(chloride)(μ-chloride)]2; sodium acetate In chlorobenzene at 110℃; for 18h; Schlenk technique; Inert atmosphere; regioselective reaction;	89%

: 92-43-3
1-phenylpyrazolidin-3-one

: 1190837-95-6
4-iodo-1-phenyl-1H-pyrazol-3-ol

Conditions

Conditions	Yield
With sulfuric acid; dihydrogen peroxide; sodium iodide In dichloromethane; water at 25℃; for 2h;	89%

: 92-43-3
1-phenylpyrazolidin-3-one

: 1394173-12-6
1-((3,5-dimethoxyphenyl)ethynyl)cyclobutanol

: 9-(3,5-dimethoxyphenyl)-9-(2-oxopentyl)-2,3-dihydro-1H,9H-pyrazolo[1,2-a]indazol-1-one

Conditions

Conditions	Yield
With copper(l) iodide; dichloro(pentamethylcyclopentadienyl)rhodium (III) dimer; sodium carbonate In 1,2-dichloro-ethane at 50℃; for 12h; Inert atmosphere;	89%

: 92-43-3
1-phenylpyrazolidin-3-one

: 1-(naphthalen-2-ylethynyl)cyclobutanol

: 9-(naphthalen-2-yl)-9-(2-oxopentyl)-2,3-dihydro-1H,9H-pyrazolo[1,2-a]indazol-1-one

Conditions

Conditions	Yield
With copper(l) iodide; dichloro(pentamethylcyclopentadienyl)rhodium (III) dimer; sodium carbonate In 1,2-dichloro-ethane at 50℃; for 12h; Inert atmosphere;	89%

: 92-43-3
1-phenylpyrazolidin-3-one

: 766-83-6
m-chlorophenylacetylene

: 3-(2-(3-chlorophenyl)-1H-indol-1-yl)propanamide

Conditions

Conditions	Yield
With [ruthenium(II)(η6-1-methyl-4-isopropyl-benzene)(chloride)(μ-chloride)]2; sodium acetate In chlorobenzene at 110℃; for 18h; Schlenk technique; Inert atmosphere; regioselective reaction;	88%

: 92-43-3
1-phenylpyrazolidin-3-one

: 145279-67-0
O-benzoyl-N-sec-butylhydroxylamine

: 1-[2-(sec-butylamino)phenyl]-3-pyrazolidinone

Conditions

Conditions	Yield
With dichloro(pentamethylcyclopentadienyl)rhodium (III) dimer; cesium acetate; Trimethylacetic acid In toluene at 20℃;	88%

: 92-43-3
1-phenylpyrazolidin-3-one

: 308805-77-8
1-(2-phenylethynyl)-1-cyclobutanol

: 9-(2-oxopentyl)-9-phenyl-2,3-dihydro-1H,9H-pyrazolo[1,2-a]indazol-1-one

Conditions

Conditions	Yield
With copper(l) iodide; dichloro(pentamethylcyclopentadienyl)rhodium (III) dimer; sodium carbonate In 1,2-dichloro-ethane at 50℃; for 12h; Catalytic behavior; Reagent/catalyst; Solvent; Temperature; Inert atmosphere;	88%
With dichloro(pentamethylcyclopentadienyl)rhodium (III) dimer; sodium acetate In dichloromethane at 60℃; for 8h;	85%

: 92-43-3
1-phenylpyrazolidin-3-one

: 1-((4-chlorophenyl)ethynyl)cyclobutane-1-ol

: 9-(4-chlorophenyl)-9-(2-oxopentyl)-2,3-dihydro-1H,9H-pyrazolo[1,2-a]indazol-1-one

Conditions

Conditions	Yield
With copper(l) iodide; dichloro(pentamethylcyclopentadienyl)rhodium (III) dimer; sodium carbonate In 1,2-dichloro-ethane at 50℃; for 12h; Inert atmosphere;	88%

: 92-43-3
1-phenylpyrazolidin-3-one

: C12H11BrO

: 9-(3-bromophenyl)-9-(2-oxopentyl)-2,3-dihydro-1H,9H-pyrazolo[1,2-a]indazol-1-one

Conditions

Conditions	Yield
With copper(l) iodide; dichloro(pentamethylcyclopentadienyl)rhodium (III) dimer; sodium carbonate In 1,2-dichloro-ethane at 50℃; for 12h; Inert atmosphere;	88%

: 92-43-3
1-phenylpyrazolidin-3-one

: 1719-19-3
2-Methyl-4-phenyl-3-butyn-2-ol

: 5,5-dimethyl-7-phenyl-1,2-dihydro-3H,5H-benzo[c]pyrazolo[1,2-a][1,2]diazepin-3-one

Conditions

Conditions	Yield
With dichloro(pentamethylcyclopentadienyl)rhodium (III) dimer; zinc diacetate; sodium acetate In toluene at 100℃; for 4h; Catalytic behavior; Reagent/catalyst; Solvent; Temperature; Sealed tube;	88%

: 92-43-3
1-phenylpyrazolidin-3-one

: 3032-92-6
4-cyanophenylacetylene

: 3-(2-(4-cyanophenyl)-1H-indol-1-yl)propanamide

Conditions

Conditions	Yield
With [ruthenium(II)(η6-1-methyl-4-isopropyl-benzene)(chloride)(μ-chloride)]2; sodium acetate In chlorobenzene at 110℃; for 18h; Schlenk technique; Inert atmosphere; regioselective reaction;	87%

: 92-43-3
1-phenylpyrazolidin-3-one

: 2765-16-4
bis(3-methylphenyl)acetylene

: 3-(2,3-di-m-tolyl-1H-indol-1-yl)propanamide

Conditions

Conditions	Yield
With dichloro(pentamethylcyclopentadienyl)rhodium (III) dimer; palladium diacetate; sodium carbonate In 1,2-dichloro-ethane at 100℃; for 2h; Sealed tube;	87%

: 92-43-3
1-phenylpyrazolidin-3-one

: 1275615-59-2
4-cyclopropyl-2-methylbut-3-yn-2-yl acetate

: 7-cyclopropyl-5,5-dimethyl-1,2-dihydro-3H,5H-benzo[c]pyrazolo[1,2-a][1,2]diazepin-3-one

Conditions

Conditions	Yield
With dichloro(pentamethylcyclopentadienyl)rhodium (III) dimer; sodium acetate In 1,2-dichloro-ethane at 100℃; for 12h;	87%

: 92-43-3
1-phenylpyrazolidin-3-one

: 61423-02-7
ethyl 1,1-dimethyl-3-phenylpropargyl acetate

: 5,5-dimethyl-7-phenyl-1,2-dihydro-3H,5H-benzo[c]pyrazolo[1,2-a][1,2]diazepin-3-one

Conditions

Conditions	Yield
With dichloro(pentamethylcyclopentadienyl)rhodium (III) dimer; sodium acetate In 1,2-dichloro-ethane at 100℃; for 12h; Catalytic behavior; Reagent/catalyst; Solvent;	87%

: 92-43-3
1-phenylpyrazolidin-3-one

: 524742-03-8
1-((4-methylphenyl)ethynyl)cyclobutanol

: 9-(2-oxopentyl)-9-(p-tolyl)-2,3-dihydro-1H,9H-pyrazolo[1,2-a]indazol-1-one

Conditions

Conditions	Yield
With copper(l) iodide; dichloro(pentamethylcyclopentadienyl)rhodium (III) dimer; sodium carbonate In 1,2-dichloro-ethane at 50℃; for 12h; Inert atmosphere;	87%

Phenidone Consensus Reports

Reported in EPA TSCA Inventory.

Phenidone Specification

The IUPAC name of Phenidone is 1-phenylpyrazolidin-3-one. With the CAS registry number 92-43-3, it is also named as 2-Pyrazolin-3-ol, 1-phenyl-; Fenidon. In addiotion, this chemical is light beige powder or crystals which is soluble in hot water. And it is stable, but light sensitive. It is also incompatible with strong acids, strong oxidizing agents, strong bases.

The other characteristics of this product can be summarized as: (1)ACD/LogP: 0.19; (2)# of Rule of 5 Violations: 0; (3)ACD/LogD (pH 5.5): 0.19; (4)ACD/LogD (pH 7.4): 0.18; (5)ACD/BCF (pH 5.5): 1; (6)ACD/BCF (pH 7.4): 1; (7)ACD/KOC (pH 5.5): 30.05; (8)ACD/KOC (pH 7.4): 29.82; (9)#H bond acceptors: 3; (10)#H bond donors: 1; (11)#Freely Rotating Bonds: 1; (12)Index of Refraction: 1.578; (13)Molar Refractivity: 45.32 cm³; (14)Molar Volume: 136.4 cm³; (15)Polarizability: 17.96×10^-24 cm³; (16)Surface Tension: 45.2 dyne/cm; (17)Enthalpy of Vaporization: 57.49 kJ/mol; (18)Vapour Pressure: 0.000393 mmHg at 25°C; (19)Rotatable Bond Count: 1; (20)Tautomer Count: 3; (21)Exact Mass: 162.079313; (22)MonoIsotopic Mass: 162.079313; (23)Topological Polar Surface Area: 32.3; (24)Heavy Atom Count: 12.

Uses of Phenidone: This product is used as a photographic developer. Unlike some other developers, it has low toxicity and does not cause dermatitis upon skin contact. It also can used in organic synthesis. For example: It can react with 1-vinyl-pyrrolidin-2-one to get 1-(2-oxopyrrolidin-1-yl)-1-(5-oxo-2-phenylpyrazolidin-1-yl)ethane. This reaction needs reagent Me₃SiCl by heating. The yield is 96%.

When you are using this chemical, please be cautious about it as the following:
It is harmful if swallowed. And it is toxic to aquatic organisms, may cause long-term adverse effects in the aquatic environment, so people should avoid releasing to the environment. Refer to special instructions / safety data sheets.

People can use the following data to convert to the molecule structure.
1. SMILES: O=C2NN(c1ccccc1)CC2;
2. InChI: InChI=1/C9H10N2O/c12-9-6-7-11(10-9)8-4-2-1-3-5-8/h1-5H,6-7H2,(H,10,12).

The following are the toxicity data which has been tested.

Organism	Test Type	Route	Reported Dose (Normalized Dose)	Effect	Source
guinea pig	LD50	skin	> 1gm/kg (1000mg/kg)		Kodak Company Reports. Vol. 21MAY1971,
guinea pig	LD50	unreported	1310mg/kg (1310mg/kg)	BEHAVIORAL: ALTERED SLEEP TIME (INCLUDING CHANGE IN RIGHTING REFLEX) LUNGS, THORAX, OR RESPIRATION: DYSPNEA BEHAVIORAL: MUSCLE CONTRACTION OR SPASTICITY)	Gigiena i Sanitariya. For English translation, see HYSAAV. Vol. 49(9), Pg. 87, 1984.
mouse	LD50	oral	360mg/kg (360mg/kg)		Gigiena Truda i Professional'nye Zabolevaniya. Labor Hygiene and Occupational Diseases. Vol. 31(1), Pg. 49, 1987.
mouse	LD50	unreported	287mg/kg (287mg/kg)	BEHAVIORAL: ALTERED SLEEP TIME (INCLUDING CHANGE IN RIGHTING REFLEX) BEHAVIORAL: MUSCLE CONTRACTION OR SPASTICITY) LUNGS, THORAX, OR RESPIRATION: DYSPNEA	Gigiena i Sanitariya. For English translation, see HYSAAV. Vol. 49(9), Pg. 87, 1984.
rat	LD50	intraperitoneal	200mg/kg (200mg/kg)		Kodak Company Reports. Vol. 21MAY1971,
rat	LD50	oral	200mg/kg (200mg/kg)		Kodak Company Reports. Vol. 21MAY1971,
rat	LD50	unreported	309mg/kg (309mg/kg)	BEHAVIORAL: ALTERED SLEEP TIME (INCLUDING CHANGE IN RIGHTING REFLEX) BEHAVIORAL: MUSCLE CONTRACTION OR SPASTICITY) LUNGS, THORAX, OR RESPIRATION: DYSPNEA	Gigiena i Sanitariya. For English translation, see HYSAAV. Vol. 49(9), Pg. 87, 1984.

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