ChemicalBook > CAS DataBase List > 5-AMINO-3-ETHYL-1H-PYRAZOLE

5-AMINO-3-ETHYL-1H-PYRAZOLE

Product Name
5-AMINO-3-ETHYL-1H-PYRAZOLE
CAS No.
1904-24-1
Chemical Name
5-AMINO-3-ETHYL-1H-PYRAZOLE
Synonyms
H50782;3-AMino-5-ethylpyrazole;5-AMINO-3-ETHYL-1H-PYRAZOLE;3-Amino-5-ethyl-2H-pyrazole;5-ethyl-3-aMino-1H-pyrazole;5-ETHYL-2H-PYRAZOL-3-YLAMINE;1H-Pyrazol-3-amine, 5-ethyl-;5-Amino-3-ethyl-1H-pyrazole;3-Ethyl-1H-pyrazol-5-amine hydrochloride
CBNumber
CB7301937
Molecular Formula
C5H9N3
Formula Weight
111.15
MOL File
1904-24-1.mol
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5-AMINO-3-ETHYL-1H-PYRAZOLE Property

Boiling point:
313.8±22.0 °C(Predicted)
Density 
1.126 g/mL at 25 °C
refractive index 
1.5420
Flash point:
>110℃
storage temp. 
Keep in dark place,Sealed in dry,Store in freezer, under -20°C
form 
solid
pka
15.84±0.10(Predicted)
Appearance
Light yellow to yellow Liquid
InChI
InChI=1S/C5H9N3/c1-2-4-3-5(6)8-7-4/h3H,2H2,1H3,(H3,6,7,8)
InChIKey
AXDGPQLEVYSXNL-UHFFFAOYSA-N
SMILES
N1C(CC)=CC(N)=N1
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Safety

Hazard Codes 
Xn
Risk Statements 
22-36/37/38
Safety Statements 
23-26-36/37/39
WGK Germany 
3
HazardClass 
IRRITANT
HS Code 
2933199090
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Hazard and Precautionary Statements (GHS)

Symbol(GHS)
Signal word
Warning
Hazard statements

H302Harmful if swallowed

H315Causes skin irritation

H319Causes serious eye irritation

H335May cause respiratory irritation

Precautionary statements

P261Avoid breathing dust/fume/gas/mist/vapours/spray.

P305+P351+P338IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.

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N-Bromosuccinimide Price

Sigma-Aldrich
Product number
CDS019625
Product name
5-Amino-3-ethyl-1H-pyrazole
Purity
Aldrich
Packaging
100mg
Price
$107
Updated
2025/07/31
Sigma-Aldrich
Product number
755222
Product name
5-Amino-3-ethyl-1H-pyrazole
Packaging
1g
Price
$131
Updated
2023/06/20
TRC
Product number
E926535
Product name
3-Ethyl-1H-pyrazol-5-amine
Packaging
100mg
Price
$60
Updated
2021/12/16
Apolloscientific
Product number
OR480223
Product name
3-Amino-5-ethyl-2H-pyrazole
Purity
97%
Packaging
1g
Price
$140
Updated
2021/12/16
Matrix Scientific
Product number
048323
Product name
3-Amino-5-ethyl-1H-pyrazole
Purity
97%
Packaging
5g
Price
$149
Updated
2021/12/16
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5-AMINO-3-ETHYL-1H-PYRAZOLE Chemical Properties,Usage,Production

Uses

3-Amino-5-ethyl-1H-pyrazole is an important raw material and intermediate used in organic synthesis, pharmaceuticals, agrochemicals and dyestuff.

Definition

ChEBI: 3-Amino-5-ethyl-1H-pyrazole is a dicarboximide and a heterocyclic compound.

Synthesis

33279-01-5

1904-24-1

GENERAL STEPS: 3-Oxopentanenitrile (XXXV; 2 g; 21 mmol) was dissolved in ethanol (60 mL) under stirring conditions, followed by the addition of hydrazine hydrate (1.3 mL; 41 mmol). The reaction mixture was heated to reflux for 12 hours. Upon completion of the reaction, the mixture was cooled to room temperature and concentrated under reduced pressure. The crude product was purified by column chromatography (eluent: 8% methanol-dichloromethane) to afford 5-ethyl-1H-pyrazol-3-amine (XXXVI; 1.8 g; 78% yield) as a brown viscous solid. The structure of the product was confirmed by 1H NMR (400 MHz, DMSO-d6): δ 11.0 (broad single peak, 1H), 5.17 (single peak, 1H), 4.5 (broad single peak, 2H), 2.4 (multiple peaks, 2H), and 1.1 (triple peak, 3H). Mass spectrometry analysis showed a molecular ion peak (M+1) of 111.93.

References

[1] Patent: WO2015/97122, 2015, A1. Location in patent: Page/Page column 92
[2] Patent: WO2007/99326, 2007, A1. Location in patent: Page/Page column 114

5-AMINO-3-ETHYL-1H-PYRAZOLE Preparation Products And Raw materials

Raw materials

Preparation Products

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5-AMINO-3-ETHYL-1H-PYRAZOLE Suppliers

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View Lastest Price from 5-AMINO-3-ETHYL-1H-PYRAZOLE manufacturers

Career Henan Chemical Co
Product
5-AMINO-3-ETHYL-1H-PYRAZOLE 1904-24-1
Price
US $8.00/KG
Min. Order
1KG
Purity
99%
Supply Ability
10tons
Release date
2018-12-25

1904-24-1, 5-AMINO-3-ETHYL-1H-PYRAZOLERelated Search:

5-AMINO-4-CYANO-3-CYANOMETHYLPYRAZOLE 5-AMINO-3-TERT-BUTYL-1-METHYLPYRAZOLE 3-CYCLOPROPYL-1-METHYL-1H-PYRAZOL-5-AMINE 3-AMINO-5-TERT-BUTYLPYRAZOLE 5-AMINO-4-CYANO-3-CYANOMETHYL-1-PHENYLPYRAZOLE 5-CYCLOPROPYL-2H-PYRAZOL-3-YLAMINE 3-AMINO-1-ETHYL-1H-PYRAZOLE-4-CARBONITRILE ETHYL 4-AMINO-1-ETHYL-1H-PYRAZOLE-3-CARBOXYLATE HYDROCHLORIDE,4-AMINO-1-ETHYL-1H-PYRAZOLE-3-CARBOXYLIC ACID ETHYL ESTER HCL N1-(3-CYCLOPROPYL-1-PHENYL-1H-PYRAZOL-5-YL)-2-CHLOROACETAMIDE 3-CYCLOPROPYL-1-PHENYL-1H-PYRAZOL-5-AMINE 4-AMINO-1-ETHYL-1 H-PYRAZOLE-3-CARBOXYLIC ACID ETHYL ESTER 4-AMINO-1-ETHYL-1 H-PYRAZOLE-3-CARBOXYLIC ACID (2-METHOXY-ETHYL)-AMIDE 4-AMINO-1-ETHYL-1 H-PYRAZOLE-3-CARBOXYLIC ACID ISOPROPYLAMIDE 4-Amino-1-ethyl-1H-pyrazole-3-carboxylic acid 4-AMINO-1-ETHYL-1H-PYRAZOLE-3-CARBOXAMIDE,4-AMINO-1-ETHYL-1H-PYRAZOLE-3-CARBOXYLIC ACID AMIDE 4-AMINO-1-ETHYL-1 H-PYRAZOLE-3-CARBOXYLIC ACID METHYLAMIDE 4-AMINO-1-ETHYL-1 H-PYRAZOLE-3-CARBOXYLIC ACID CYCLOPENTYLAMIDE 4-AMINO-2-ETHYL-2 H-PYRAZOLE-3-CARBOXYLIC ACID (1,5-DIMETHYL-1 H-PYRAZOL-4-YL)-AMIDE

  • 5-AMINO-3-ETHYL-1H-PYRAZOLE
  • 5-ETHYL-2H-PYRAZOL-3-YLAMINE
  • 5-ethyl-3-aMino-1H-pyrazole
  • 3-Amino-5-ethyl-2H-pyrazole
  • 3-Ethyl-1H-pyrazol-5-amine hydrochloride
  • H50782
  • 1H-Pyrazol-3-amine, 5-ethyl-
  • 3-AMino-5-ethylpyrazole
  • 5-Amino-3-ethyl-1<i>H</i>-pyrazole
  • 1904-24-1