HuagongsheHuagongshe Chemistry Print Report · For research reference only
HCID 5284488Generated: October 24, 2026
2-Chloromaleic acid
Nsc42913 · Wln: qvygu1vq -t · 2-chloromaleic acid · Fumaric acid, chloro- · (Z)-2-Chloro-2-butenedioic acid · 2-Butenedioic acid, 2-chloro-, (Z)- · 2-Butenedioic acid, 2-chloro-, (2Z)-
https://huagongshe.com/en/chemical/5284488
Identifiers & Physical Properties
| CAS No. | 19071-21-7 |
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| Molecular formula | C4H3ClO4 |
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| Average molar mass | 150.52 g/mol |
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| Monoisotopic mass | 149.97198626 g/mol |
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| SMILES | O=C(O)/C=C(\Cl)C(=O)O |
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| InChIKey | ZQHJVIHCDHJVII-UPHRSURJSA-N |
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| PubChem CID | 5284488 |
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| EC No. | 622-391-2 |
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| DTXSID | DTXSID2021529 |
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Chemical & Physical Properties
| XLogP | 0.4 |
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| Topological polar surface area | 74.6 |
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| Hydrogen bond donors | 2 |
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| Hydrogen bond acceptors | 4 |
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| Rotatable bonds | 2 |
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| Heavy atoms | 9 |
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| Formal charge | 0 |
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| Complexity | 171 |
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| SpringerMaterials Properties | Diamagnetic susceptibility |
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| Melting point | 191-192 °C |
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| Boiling point | 326.0±27.0 °C(Predicted) |
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| Density | 1.698±0.06 g/cm3(Predicted) |
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| pKa (acidity coefficient) | 1.52±0.19(Predicted) |
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Safety & Regulations
| GHS classification | WarningH302 (100%): Harmful if swallowed [Warning Acute toxicity, oral]P261, P264, P270, P272, P280, P301+P317, P302+P352, P321, P330, P333+P317, P362+P364, and P501 (click each P-code to see the statement)Aggregated GHS information provided per 39 reports by companies from 1 notifications to the ECHA C&L Inventory. Each notification may be associated with multiple companies. |
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| Hazard Classes and Categories | Acute Tox. 4 (100%) |
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