Jingsj
.mol.sdf

4-Hydroxypyrazole

4-羟基吡唑

Also known as: 1H-pyrazol-4-ol, pyrazol-4-ol, 4-HP

4-Hydroxypyrazole (CAS 4843-98-5) is a compound in the Pharma Intermediates category listed in the Jingsj chemical database. It has the molecular formula C3H4N2O and a molecular weight of 84.07670 g/mol. It is also known as 1H-pyrazol-4-ol, pyrazol-4-ol and 4-HP. Key properties include a boiling point of 326.1ºC at 760mmHg, a density of 1.415g/cm3 and a flash point of 151ºC. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.
4843-98-5
Jingsj CID
J-1151681-3
Molecular Formula
C3H4N2O
Chinese Name
4-羟基吡唑
Molecular Weight
84.07670 g/mol
Category
Pharma Intermediates
Last updated
8/21/2026

No offers for this compound yet.

Request a quote

Physicochemical Properties

Boiling Point326.1ºC at 760mmHg
Density1.415g/cm3
Flash Point151ºC
Exact Mass84.03240
PSA48.91000
LogP0.11530
Refractive Index1.612

Customs & Trade Information

HS Code2933199090
Summary2933199090. other compounds containing an unfused pyrazole ring (whether or not hydrogenated) in the structure. VAT:17.0%. Tax rebate rate:13.0%. . MFN tariff:6.5%. General tariff:20.0%

Frequently Asked Questions

What is the CAS number of 4-Hydroxypyrazole?

The CAS number of 4-Hydroxypyrazole is 4843-98-5.

What are the molecular formula and molecular weight of 4-Hydroxypyrazole?

4-Hydroxypyrazole has molecular formula C3H4N2O and molecular weight 84.07670 g/mol.

What are the upstream and downstream products of 4-Hydroxypyrazole?

For 4-Hydroxypyrazole, Upstream Products: 4-(4,4,5,5-Tetramethyl-1,3,2-dioxaborolan-2-yl)-1H-pyrazole.

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

Last updated:

How to cite: Jingsj. "4-Hydroxypyrazole (CAS 4843-98-5)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1151681-3 (accessed 2026-10-29).

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