Nifedipine (C17H18N2O6): structure, properties and hazards

Names and identifiers

IUPAC name: dimethyl 2,6-dimethyl-4-(2-nitrophenyl)-1,4-dihydropyridine-3,5-dicarboxylate
Synonyms: Procardia, Adalat, dihydropyridine
+ 36 more
Procardia XL, Citilat, Oxcord, Adalat CC, Fenihidine, dimethyl 2,6-dimethyl-4-(2-nitrophenyl)-1,4-dihydropyridine-3,5-dicarboxylate, Bay-a-1040, Coracten, Afeditab CR, Nifedipino, Nifedipinum, Adipine XL, Afeditab, Calcilat, Nifedical, BAY A 1040, 1,4-Dihydro-2,6-dimethyl-4-(2-nitrophenyl)-3,5-pyridinedicarboxylic acid dimethyl ester, Nifensar XL, 3,5-Pyridinedicarboxylic acid, 1,4-dihydro-2,6-dimethyl-4-(2-nitrophenyl)-, dimethyl ester, Nifedical XL, Adalate LP, DTXSID2025715, Nifedipine slow release, 3,5-dimethyl 2,6-dimethyl-4-(2-nitrophenyl)-1,4-dihydropyridine-3,5-dicarboxylate, CHEBI:7565, I9ZF7L6G2L, BAYa1040, NSC-757242, BAY 1040, Dimethyl 1,4-dihydro-2,6-dimethyl-4-(2'-nitrophenyl)-3,5-pyridinedicarboxylate, Dimethyl 1,4-dihydro-2,6-dimethyl-4-(2-nitrophenyl)-3,5-pyridinedicarboxylate, DTXCID205715, Cordipine, Korinfar, 4-(2'-Nitrophenyl)-2,6-dimethyl-3,5-dicarbomethoxy-1,4-dihydropyridine, Nifedipine-GTIS
Molecular formula: C₁₇H₁₈N₂O₆
Empirical formula: C₁₇H₁₈N₂O₆
Molecular weight: 346.3 g/mol
Exact mass: 346.11649
CAS number: 21829-25-4
PubChem CID: 4485
Canonical SMILES: CC1=C(C(C(=C(N1)C)C(=O)OC)C2=CC=CC=C2[N+](=O)[O-])C(=O)OC
Isomeric SMILES: CC1=C(C(C(=C(N1)C)C(=O)OC)C2=CC=CC=C2[N+](=O)[O-])C(=O)OC
InChI: InChI=1S/C17H18N2O6/c1-9-13(16(20)24-3)15(14(10(2)18-9)17(21)25-4)11-7-5-6-8-12(11)19(22)23/h5-8,15,18H,1-4H3
InChIKey: HYIMSNHJOBLJNT-UHFFFAOYSA-N
Molfile

Names, InChI and the identifiers from PubChem, retrieved 2026-10-14.

Physical properties

TemperaturePressureDensity

Appearance: Nifedipine appears as odorless yellow crystals or powder. Tasteless. (NTP, 1992)[1]
Melting point: 172 to 174 °C (342 to 345 °F, NTP 1992)[1]
Solubility in water: In water, 1.7 × 10⁻⁵ mol/L = 5.9 mg/L at 25 °C[2]
2 values
From Hazardous Substances Data Bank (HSDB), the most authoritative source here.
Value As written Source
– less than 1 mg/mL at 67.1 °F (NTP, 1992) [1] CAMEO Chemicalscites National Toxicology Program, Institute of Environmental Health Sciences, National Institutes of Health (NTP). 1992. National Toxicology Program Chemical Repository Database. Research Triangle Park, North Carolina.
–shown In water, 1.7X10-5 mol/L = 5.9 mg/L at 25 °C [2] Hazardous Substances Data Bank (HSDB)cites PMID:12146628 Ran Y et al; Chemosphere 48: 487-509 (2002)
log P: log Kow = 2.20[2]
Vapor pressure: 2.6 × 10⁻⁸ mmHg at 25 °C[2]

Value	As written	Source
–	less than 1 mg/mL at 67.1 °F (NTP, 1992)	[1] CAMEO Chemicalscites National Toxicology Program, Institute of Environmental Health Sciences, National Institutes of Health (NTP). 1992. National Toxicology Program Chemical Repository Database. Research Triangle Park, North Carolina.
–shown	In water, 1.7X10-5 mol/L = 5.9 mg/L at 25 °C	[2] Hazardous Substances Data Bank (HSDB)cites PMID:12146628 Ran Y et al; Chemosphere 48: 487-509 (2002)

Each value as its source reports it, with the source's number after it (listed under References). Where several sources report a property, the row shows the value most of them agree on, the rule the app uses; open the values to see every one.

Calculated

Heavy atoms: 25
Rings: 2
Aromatic rings: 1
Fraction sp³ carbons (Fsp3): 0.29
H-bond donors: 1
H-bond acceptors: 7
Rotatable bonds: 4 computed here · PubChem 5
TPSA (Å²): 107.8 computed here · PubChem 110
Formal charge: 0
XLogP3: 2.2 PubChem
Complexity: 608 PubChem
Stereocenters: None
Double-bond geometry: None specified
Point group: C1 of one 3D conformer with its hydrogens, by Athanor’s engine (as in the app)

Elemental analysis

C58.96%
H5.24%
N8.09%
O27.72%

Isotope pattern

Each peak is a nominal mass with its abundance-weighted exact mass, as a percentage of the tallest, from IUPAC natural isotope abundances.

Computed from the structure with RDKit 2026.09 when this page was built, beside PubChem's own computed values from its record; where the two differ, both are shown.

Predicted

log P: 2.18 Crippen (Wildman and Crippen 1999)
log S (water solubility): -3.27 ESOL (Delaney 2004), log mol/L
Synthetic accessibility: 2.3 SA score, 1 easy to 10 hard (Ertl and Schuffenhauer 2009)

Drug-likeness: Lipinski’s rule of five

Molecular weight ≤ 500: 346.34
log P ≤ 5 (Crippen): 2.18
H-bond donors ≤ 5: 1
H-bond acceptors ≤ 10: 7

Passes all four rules.

¹³C NMR shifts, predicted

Predictions, not measurements; each names its method. A measured log P, where a source reports one, is under Physical properties.

Safety

Warning

Most widely reported: 120 company reports to ECHA. Source [3].

Harmful or irritant
Health hazard

H302Harmful if swallowed (98.3% of reports)
H361Suspected of damaging fertility or the unborn child (25.8% of reports)

Precautionary statements: P203, P264, P270, P280, P301+P317, P318, P330, P405, P501

First aid

Eyes: First check the victim for contact lenses and remove if present. Flush victim's eyes with water or normal saline solution for 20 to 30 minutes while simultaneously calling a hospital or poison control center. Do not put any ointments, oils, or medication in the victim's eyes without specific instructions from a physician. Immediately transport the victim after flushing eyes to a hospital even if no symptoms (such as redness or irritation) develop. Skin: Immediately flood affected skin with water while removing and isolating all contaminated clothing.[1]

Storage

Nifedipine liquid-filled capsules should be protected from light and moisture and stored in tight, light-resistant containers at a temperature of 15-25 °C, and extended-release tablets of the drug should be protected from light and moisture and stored in tight, light-resistant containers at a temperature less than 30 °C.[2]

Safety data sheets on the supplier’s page: Enamine, Alfa Chemistry, 001Chemical.

Always read the supplier’s safety data sheet before working with it.

Spectra

Experimental spectra held by these sources; each link opens the source's own record.

Literature

Reading PubChem, OpenAlex and GSRS…

Bioactivity

Reading ChEMBL…

References

[1]CAMEO Chemicals · Public domain (NOAA) · via PubChem · retrieved 2026-10-14
[2]Hazardous Substances Data Bank (HSDB) · Public domain (US NLM) · via PubChem · retrieved 2026-10-14
[3]European Chemicals Agency (ECHA) · ECHA legal notice: reuse with acknowledgement · via PubChem · retrieved 2026-10-14
[4]SpectraBase · Linked only · via PubChem · retrieved 2026-10-14
[5]NIST Mass Spectrometry Data Center · Linked only · via PubChem · retrieved 2026-10-14
[6]Human Metabolome Database (HMDB) · Linked only · via PubChem · retrieved 2026-10-14
[7]MassBank Europe · Linked only · via PubChem · retrieved 2026-10-14
[8]MassBank of North America (MoNA) · CC BY 4.0 · via PubChem · retrieved 2026-10-14
·Calculated values: computed by Athanor with RDKit 2026.09 from the structure.
·Literature on PubChem

Data last updated 2026-10-14.