Morphine
A morphinane alkaloid that is a highly potent opiate analgesic psychoactive drug. Morphine acts directly on the central nervous system (CNS) to relieve pain but has a high potential for addiction, with tolerance and both physical and psychological dependence developing rapidly. Morphine is the most abundant opiate found in Papaver somniferum (the opium poppy). — ChEBI
Safety documents & references
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Identity & molecular properties
Source-linked values| CAS number | 57-27-2 | ChEBI ↗ |
| Molecular formula | C17H19NO3 | ChEBI ↗ |
| Molar mass | 285.343 g/mol | ChEBI ↗ |
| Monoisotopic mass | 285.13649 Da | ChEBI ↗ |
| Formal charge | 0 | ChEBI ↗ |
| ChEBI identifier | CHEBI:17303 | ChEBI ↗ |
Cross-source molecular data
PubChem| Molar mass | 285.34 g/mol | PubChem ↗ |
| Exact mass | 285.13649347 Da | PubChem ↗ |
| Computed XLogP | 0.8 | PubChem ↗ |
| Topological polar surface area (Ų) | 52.9 | PubChem ↗ |
| H-bond donors | 2 | PubChem ↗ |
| H-bond acceptors | 4 | PubChem ↗ |
| Rotatable bonds | 0 | PubChem ↗ |
PubChem computed values are shown separately from the ChEBI record. An exact InChIKey match was used to connect the records. Molecular descriptors do not describe a supplied product’s purity, particle size or performance.
Names & structural identifiers
Copy any identifiermorphine17-methyl-7,8-didehydro-4,5alpha-epoxymorphinan-3,6alpha-diolBQJCRHHNABKAKU-KBQPJGBKSA-N[H][C@@]12C=C[C@H](O)[C@@H]3Oc4c(O)ccc5c4[C@@]31CCN(C)[C@@H]2C5InChI=1S/C17H19NO3/c1-18-7-6-17-10-3-5-13(20)16(17)21-15-12(19)4-2-9(14(15)17)8-11(10)18/h2-5,10-11,13,16,19-20H,6-8H2,1H3/t10-,11+,13-,16-,17-/m0/s1Names & synonyms
Names are supplied by ChEBI. Trade names and related synonyms may describe a broader product context.
Classification & relationships
ChEBI ontologyRoles recorded in ChEBI
Database role annotations describe reported biological or chemical roles; they are not product approvals or recommendations for use.
Mass ↔ amount of substance
Calculated from sourced massUses 285.343 g/mol from ChEBI. Assumes the substance described by this record; no purity or concentration correction is applied.
Elemental composition
Theoretical mass fractionsCOHNCalculated theoretical mass fractions from the reported formula and PubChem periodic-table atomic masses. These are not assay or purity results.
Research & patent references
Selected source associationsSources & record history
Checked 27 Sep 2026Release 255, 9 September 2026. ChEBI three-star (manually annotated) source entry. View original record ↗ · CC BY 4.0
PubCAS formats source data, connects references and computes explicitly labelled conversions. CAS cross-references are supplied by ChEBI; they do not constitute CAS verification or endorsement.