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Name 1H-Pyrazole-4-carboxaldehyde
EINECS636-879-8
CAS No. 35344-95-7
Density1.322 g/cm³
PSA45.75000
LogP0.22220
SolubilityN/A
Melting Point82-83 °C(Solv: cyclohexane (110-82-7))
FormulaC₄H₄N₂O
Boiling Point300 °C at 760 mmHg
Molecular Weight96.0886
Flash Point139.7 °C
Transport InformationN/A
AppearanceN/A
Safety
Risk CodesN/A
Molecular Structure
Hazard SymbolsXi
SynonymsXi
Article Data13

1H-Pyrazole-4-carboxaldehyde Synthetic route

: 37622-90-5
4-ethoxycarbonylpyrazole

: 35344-95-7
1H-pyrazole-4-carbaldehyde

Conditions

Conditions	Yield
With n-butyllithium; diisobutylaluminium hydride; tert-butyl alcohol In tetrahydrofuran; hexane at 0℃;	97%

: 18655-47-5
triformylmethane

: 35344-95-7
1H-pyrazole-4-carbaldehyde

Conditions

Conditions	Yield
With hydrazine hydrate In methanol at 20℃; for 5h;	87%
With hydrogenchloride; hydrazine hydrate In methanol for 22h; Ambient temperature;	52%
With hydrogenchloride; hydrazine hydrate In methanol for 22h; Ambient temperature; other hydrazines and amidines;	52%
With hydrogenchloride; hydrazine In methanol at 20℃; for 22h;

: 25222-43-9
(1H-pyrazol-4-yl)-methanol

: 35344-95-7
1H-pyrazole-4-carbaldehyde

Conditions

Conditions	Yield
With manganese(IV) oxide In acetone at 60℃; for 4h;	52.33%
With manganese(IV) oxide In acetone at 20 - 60℃;

: 2075-45-8
4-bromo-1H-pyrazole

: 68-12-2, 33513-42-7
N,N-dimethyl-formamide

: 35344-95-7
1H-pyrazole-4-carbaldehyde

Conditions

Conditions	Yield
Stage #1: 4-bromo-1H-pyrazole With tert.-butyl lithium In tetrahydrofuran; hexane at -78 - 20℃; for 3.5h; Stage #2: N,N-dimethyl-formamide In tetrahydrofuran; hexane at 20℃;	41%

: 1-(1-ethoxyethyl)-1H-pyrazole-4-carbaldehyde

: 35344-95-7
1H-pyrazole-4-carbaldehyde

Conditions

Conditions	Yield
With hydrogenchloride In 1,4-dioxane at 60℃;	0.4 g

: 153687-35-5
1-(4-methoxybenzyl)-1H-pyrazole-4-carbaldehyde

: 35344-95-7
1H-pyrazole-4-carbaldehyde

Conditions

Conditions	Yield
With trifluoroacetic acid for 2h; Heating / reflux;

: 68-12-2, 33513-42-7
N,N-dimethyl-formamide

: 591-86-6
acetaldehyde semicarbazone

: 35344-95-7
1H-pyrazole-4-carbaldehyde

Conditions

Conditions	Yield
Stage #1: N,N-dimethyl-formamide With trichlorophosphate at 0℃; for 1h; Stage #2: acetaldehyde semicarbazone at 80℃; for 1.5h;

: C9H6N6O5

A: 35344-95-7
1H-pyrazole-4-carbaldehyde

B: 112253-17-5
6-nitro-<1,2,5>oxadiazolo<3,4-b>pyridine 1-oxide

Conditions

Conditions	Yield
In dimethylsulfoxide-d6

: 1197943-43-3
1-(tetrahydro-2H-pyran-2-yl)-1H-pyrazole-4-carboxaldehyde

: 35344-95-7
1H-pyrazole-4-carbaldehyde

Conditions

Conditions	Yield
With hydrogenchloride In water at 20℃; pH=< 1;	6 g

: 373-88-6
2,2,2-trifluroethylamine hydrochloride

: 35344-95-7
1H-pyrazole-4-carbaldehyde

: 1424799-64-3
(1H-pyrazol-4-ylmethylene)(2,2,2-trifluoroethyl)amine

Conditions

Conditions	Yield
With sodium hydroxide In water; toluene at 20℃; Cooling with ice;	100%

1H-Pyrazole-4-carboxaldehyde Chemical Properties

Molecular Structure:

Molecular Formula: C₄H₄N₂O
Molecular Weight: 96.0874
IUPAC Name: 1H-Pyrazole-4-carbaldehyde
Synonyms of 1H-Pyrazole-4-carboxaldehyde (CAS NO.35344-95-7): 1H-Pyrazole-4-carbaldehyde ; Akos bb-9811
CAS NO: 35344-95-7
Product Categories: Aldehydes ; Pyrazoles & Triazoles ; Pyrazoles & Triazoles
Index of Refraction: 1.62
Molar Refractivity: 25.53 cm³
Molar Volume: 72.6 cm³
Surface Tension: 64.7 dyne/cm
Density: 1.322 g/cm³
Flash Point: 139.7 °C
Enthalpy of Vaporization: 54 kJ/mol
Boiling Point: 300 °C at 760 mmHg
Vapour Pressure of 1H-Pyrazole-4-carboxaldehyde (CAS NO.35344-95-7): 0.00115 mmHg at 25°C

1H-Pyrazole-4-carboxaldehyde Safety Profile

Hazard Codes of 1H-Pyrazole-4-carboxaldehyde (CAS NO.35344-95-7): Xi
HazardClass: IRRITANT

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Product Name

1H-Pyrazole-4-carboxaldehyde

1H-Pyrazole-4-carboxaldehyde Synthetic route

1H-Pyrazole-4-carboxaldehyde Chemical Properties

1H-Pyrazole-4-carboxaldehyde Safety Profile

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