Maleamic acid
Also known as: (Z)-4-Amino-4-oxobut-2-enoic acid, (Z)-4-amino-4-oxo-2-butenoic acid, Maleamate, Maleamidic acid, Maleic monoamide, Maleinamic acid, Aminomaleic acid, 3-carbamoylacrylic acid
Maleamic acid (CAS 557-24-4) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C4H5NO3 and a molecular weight of 115.08700 g/mol. Key properties include a melting point of 158-161 °C(lit.), a boiling point of 408.6ºC at 760mmHg, a density of 1.376g/cm3 and a flash point of 200.9ºC. 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. It is listed by 2 suppliers, 1 of which publish reference prices, from 6.10 to 19.08 CNY. Record last updated Aug 21, 2026.
- CAS No.
- 557-24-4
- Jingsj CID
- J-11686-2
- Molecular Formula
- C4H5NO3
- Molecular Weight
- 115.08700 g/mol
- Category
- Organic Acids
- Last updated
- 8/21/2026
| Supplier | Purity / Pack | Base Price | Unit Price | Origin | |
|---|---|---|---|---|---|
In Stock | >98.0%(T) 500g | ¥3,051.00 | $0.91 /gBest ¥6.10/g CNY | CN China MOQ 500g | |
In Stock | >98.0%(T) 25g | ¥477.00 | $2.86 /g ¥19.08/g CNY | CN China MOQ 25g | |
Made to Order | 98% 5g | - | - | CN China MOQ 5g |
Physicochemical Properties
| Melting Point | 158-161 °C(lit.) |
|---|---|
| Boiling Point | 408.6ºC at 760mmHg |
| Density | 1.376g/cm3 |
| Flash Point | 200.9ºC |
| Exact Mass | 115.02700 |
| PSA | 80.39000 |
| Refractive Index | 1.528 |
| Stability | Stable, but light sensitive. Incompatible with strong oxidizing agents. |
GHS Safety & Compliance
- H315 — Causes skin irritation
- H319 — Causes serious eye irritation
- H335 — May cause respiratory irritation
Customs & Trade Information
| HS Code | 2924199090 |
|---|---|
| Summary | 2924199090. other acyclic amides (including acyclic carbamates) and their derivatives; salts thereof. VAT:17.0%. Tax rebate rate:13.0%. . MFN tariff:6.5%. General tariff:30.0% |
Frequently Asked Questions
What is the CAS number of Maleamic acid?
The CAS number of Maleamic acid is 557-24-4.
What are the molecular formula and molecular weight of Maleamic acid?
Maleamic acid has molecular formula C4H5NO3 and molecular weight 115.08700 g/mol.
Which suppliers offer Maleamic acid?
2 supplier(s) listed; reference unit price ¥6.10–19.08 /g.
Is Maleamic acid hazardous?
Maleamic acid 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 Maleamic acid?
For Maleamic acid, Upstream Products: Maleic anhydride, beta-Alanine, 4-Aminobenzophenone; Downstream Products: 2H-1,3-Oxazine-2,6(3H)-dione, Ethyl cis-beta-cyanoacrylate, Fumaric acid.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "Maleamic acid (CAS 557-24-4)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-11686-2 (accessed 2026-11-06).
Data for reference only; verify product details with suppliers before purchase.