Maleic hydrazide
Also known as: 3,6-Dihydroxypyridazine, 1,2-Dihydro-3,6-pyridazinedione, 1,2-Dihydropyridazine-3,6-dione, 3,6-Pyridazinediol, 6-Hydroxy-3(2H)-pyridazinone, cis-Butenedioic acid hydrazide, Maleic hydrazine, MH-30, MH-40, Fazor, Bos MH, Vondalhyd, Yadi, Yake, gotax
Maleic hydrazide (CAS 123-33-1) is a compound in the Organic Bases category listed in the Jingsj chemical database. It has the molecular formula C4H4N2O2 and a molecular weight of 112.087 g/mol. Key properties include a melting point of 306-308 ºC, a boiling point of 477.2±25.0 °C at 760 mmHg, a density of 1.5±0.1 g/cm3 and a flash point of 242.4±23.2 °C. It is classified under GHS with signal word Warning and hazard statements H315 — Causes skin irritation, H319 — Causes serious eye irritation and H335 — May cause respiratory irritation. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 123-33-1
- Jingsj CID
- J-44504-5
- Molecular Formula
- C4H4N2O2
- Molecular Weight
- 112.087 g/mol
- Category
- Organic Bases
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | 306-308 ºC |
|---|---|
| Boiling Point | 477.2±25.0 °C at 760 mmHg |
| Density | 1.5±0.1 g/cm3 |
| Flash Point | 242.4±23.2 °C |
| Exact Mass | 112.027275 |
| PSA | 65.72000 |
| LogP | -0.14 |
| Vapor Pressure | 0.0±1.2 mmHg at 25°C |
| Refractive Index | 1.640 |
| Additional Property | 6 g/L |
GHS Safety & Compliance
- H315 — Causes skin irritation
- H319 — Causes serious eye irritation
- H335 — May cause respiratory irritation
- H341 — Suspected of causing genetic defects
Activity & Biological Data
| Additional Information | [1]. Venezian A, et al. The Influence of the Plant Growth Regulator Maleic Hydrazide on Egyptian Broomrape Early Developmental Stages and Its Control Efficacy in Tomato under Greenhouse and Field Conditions. Front Plant Sci. 2017;8:691. Published 2017 May 16. [2]. Swietlińska Z, et al. Cytotoxic effects of maleic hydrazide. Mutat Res. 1978;55(1):15-30. [3]. Yurdakok B, et al. Cytotoxic effects of etephon and maleic hydrazide in Vero, Hep2, HepG2 cells. Drug Chem Toxicol. 2014;37(4):459-465. |
|---|
Customs & Trade Information
| HS Code | 2933990011 |
|---|---|
| Summary | 2933990011 o,o-diethyl o-quinoxalin-2-yl phosphorothioate。supervision conditions:s(import or export registration certificate for pesticides)。VAT:17.0%。tax rebate rate:9.0%。MFN tarrif:6.5%。general tariff:20.0% |
Frequently Asked Questions
What is the CAS number of Maleic hydrazide?
The CAS number of Maleic hydrazide is 123-33-1.
What are the molecular formula and molecular weight of Maleic hydrazide?
Maleic hydrazide has molecular formula C4H4N2O2 and molecular weight 112.087 g/mol.
Is Maleic hydrazide hazardous?
Maleic hydrazide has GHS signal word Warning and hazard statements H315 — Causes skin irritation; H319 — Causes serious eye irritation; H335 — May cause respiratory irritation.
What are the upstream and downstream products of Maleic hydrazide?
For Maleic hydrazide, Upstream Products: Maleic anhydride, Maleic acid, acetic acid; Downstream Products: N-Aminomaleimide, 3,6-Dibromopyridazine, 6-Bromopyridazin-3(2H)-one.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "Maleic hydrazide (CAS 123-33-1)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-44504-5 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.