5-Hydroxy-1-methyl-1H-pyrazole-3-carboxylic acid

Product Name: 5-Hydroxy-1-methyl-1H-pyrazole-3-carboxylic acid
CAS No.: 58364-97-9
Chemical Name: 5-Hydroxy-1-methyl-1H-pyrazole-3-carboxylic acid
Synonyms: 5-Hydroxy-1-methyl-3-pyrazolecarboxylic acid;5-Hydroxy-1-methyl-1H-pyrazole-3-carboxylic acid;1H-Pyrazole-3-carboxylic acid, 5-hydroxy-1-methyl-;3-Carboxy-1-methyl-1H-pyrazol-5-ol, 3-Carboxy-5-hydroxy-1-methyl-1H-pyrazole
CBNumber: CB91563138
Molecular Formula: C5H6N2O3
Formula Weight: 142.11
MOL File: 58364-97-9.mol

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5-Hydroxy-1-methyl-1H-pyrazole-3-carboxylic acid Property

Melting point:: 286 °C (decomp)
Boiling point:: 415.7±30.0 °C(Predicted)
Density: 1.56±0.1 g/cm3(Predicted)
storage temp.: 2-8°C
pka: 9.39±0.28(Predicted)
Appearance: White to off-white Solid

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Safety

Hazard Codes: Xi
HS Code: 2933199090

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Hazard and Precautionary Statements (GHS)

Symbol(GHS)

Signal word

Warning

Hazard statements

H315Causes skin irritation

H319Causes serious eye irritation

H335May cause respiratory irritation

Precautionary statements

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

P271Use only outdoors or in a well-ventilated area.

P280Wear protective gloves/protective clothing/eye protection/face protection.

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N-Bromosuccinimide Price

TRC

Product number: H948918
Product name: 5-hydroxy-1-methyl-1H-pyrazole-3-carboxylicacid
Packaging: 500mg
Price: $350
Updated: 2021/12/16

Apolloscientific

Product number: OR12623
Product name: 5-Hydroxy-1-methyl-1H-pyrazole-3-carboxylicacid
Packaging: 250mg
Price: $56
Updated: 2021/12/16

SynQuest Laboratories

Product number: 4H29-1-Z5
Product name: 5-Hydroxy-1-methyl-1H-pyrazole-3-carboxylic acid
Packaging: 250mg
Price: $61
Updated: 2021/12/16

Apolloscientific

Product number: OR12623
Product name: 5-Hydroxy-1-methyl-1H-pyrazole-3-carboxylicacid
Packaging: 1g
Price: $189
Updated: 2021/12/16

SynQuest Laboratories

Product number: 4H29-1-Z5
Product name: 5-Hydroxy-1-methyl-1H-pyrazole-3-carboxylic acid
Packaging: 1g
Price: $208
Updated: 2021/12/16

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5-Hydroxy-1-methyl-1H-pyrazole-3-carboxylic acid Chemical Properties,Usage,Production

Synthesis

51986-17-5

58364-97-9

The general procedure for the synthesis of 5-hydroxy-1-methyl-1H-pyrazole-3-carboxylic acid from ethyl 1-methyl-5-hydroxypyrazole-3-carboxylate is as follows: 1. ester hydrolysis: ethyl 1-methyl-5-hydroxypyrazole-3-carboxylate (20.00 g, 0.11 mol) was dissolved in water (100 mL), and sodium hydroxide pellets were added slowly with stirring to adjust the pH of the reaction solution to about 13. 2. After the reaction was completed (stirring at room temperature for 5 hours), the pH of the reaction solution was adjusted to 1 with 2N hydrochloric acid, at which time a precipitate was generated, and the precipitate was collected by filtration. 3. The resulting solid was mixed with acetone and stirred, filtered and dried to give the off-white solid product 5-hydroxy-1-methyl-1H-pyrazole-3-carboxylic acid (9.20 g, 59% yield). Mass spectrometry analysis showed (M-H)- peak of 141.

References

[1] Patent: WO2008/47071, 2008, A1. Location in patent: Page/Page column 21

5-Hydroxy-1-methyl-1H-pyrazole-3-carboxylic acid Preparation Products And Raw materials

Raw materials

Preparation Products

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