5-Hydrazino-1,3-dimethyl-4-nitro-1H-pyrazole

5-肼基-1,3-二甲基-4-硝基-1H-吡唑

Also known as: 1,3-Dimethyl-4-nitropyrazole-5-hydrazine, 1,3-Dimethyl-4-nitro-1H-pyrazol-5-yl-hydrazine, 1,3-Dimethyl-4-nitropyrazole-5-ylhydrazine, 1,3-Dimethyl-5-hydrazino-4-nitropyrazole, 5-Hydrazinyl-1,3-dimethyl-4-nitro-1H-pyrazole, 5-Hydrazino-1,3-dimethyl-4-nitropyrazole, 1H-Pyrazole, 5-hydrazinyl-1,3-dimethyl-4-nitro-

5-Hydrazino-1,3-dimethyl-4-nitro-1H-pyrazole (CAS 66971-55-9) is a compound in the Pharma Intermediates category listed in the Jingsj chemical database. It has the molecular formula C5H9N5O2 and a molecular weight of 171.15700 g/mol. It is also known as 1,3-Dimethyl-4-nitropyrazole-5-hydrazine, 1,3-Dimethyl-4-nitro-1H-pyrazol-5-yl-hydrazine and 1,3-Dimethyl-4-nitropyrazole-5-ylhydrazine. Key properties include a boiling point of 338.5ºC at 760 mmHg, a density of 1.62g/cm3 and a flash point of 158.5ºC. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.
66971-55-9
Jingsj CID
J-1488719-8
Molecular Formula
C5H9N5O2
Chinese Name
5-肼基-1,3-二甲基-4-硝基-1H-吡唑
Molecular Weight
171.15700 g/mol
Category
Pharma Intermediates
Last updated
8/21/2026

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Physicochemical Properties

Boiling Point338.5ºC at 760 mmHg
Density1.62g/cm3
Flash Point158.5ºC

Frequently Asked Questions

What is the CAS number of 5-Hydrazino-1,3-dimethyl-4-nitro-1H-pyrazole?

The CAS number of 5-Hydrazino-1,3-dimethyl-4-nitro-1H-pyrazole is 66971-55-9.

What are the molecular formula and molecular weight of 5-Hydrazino-1,3-dimethyl-4-nitro-1H-pyrazole?

5-Hydrazino-1,3-dimethyl-4-nitro-1H-pyrazole has molecular formula C5H9N5O2 and molecular weight 171.15700 g/mol.

Data compiled from public chemical databases and supplier catalogs; supplier offers are provided by suppliers.

Last updated:

How to cite: Jingsj. "5-Hydrazino-1,3-dimethyl-4-nitro-1H-pyrazole (CAS 66971-55-9)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1488719-8 (accessed 2026-10-22).

Data for reference only; verify specifications, grades and regulatory status with suppliers before purchase.