5-Hydroxy-1-methylpyrazole CAS 33641-15-5

Introduction
5-Hydroxy-1-methylpyrazole (molecular formula C₄H₆N₂O, molar mass 98.10 g/mol) is a white crystalline solid with a pyrazole core featuring a hydroxyl group at the 5-position and a methyl substituent at the 1-position. This structural design 赋予独特 reactivity,making it a critical intermediate in agrochemical and pharmaceutical synthesis.

Chemical Properties

Appearance: White crystalline powder

Melting Point: 160–162°C

Solubility: Moderately soluble in water (1.2 g/L at 25°C); highly soluble in ethanol, methanol, and acetone.

Stability: Stable under normal conditions; decomposes in strong acidic/basic environments.

1.

Mode of Action:

Serves as a key intermediate for synthesizing ALS-inhibiting herbicides (e.g., sulfonylureas and triazolopyrimidines).

Its hydroxyl group participates in nucleophilic substitutions to form herbicidal active ingredients targeting annual weeds.

2.

Derivatives:

Precursors for fungicides like pyraclostrobin and insecticides like fipronil analogs.

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Our company mainly produces Insecticides, Herbicides, and Fungicides, catalysts and fine chemicals.
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Phone: +8618615266189

Email: export006@sparrowchemical.com

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