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Database / Pharmaceutical impurity

Pharmaceutical impurity

Adamantane

Adamantane is listed in the pharmaceutical impurity collection under CAS 281-23-2. Its represented structure has formula C10H16 and a calculated molecular weight of 136.24 g/mol.

2D chemical structure

Chemical identity

Catalog name
Adamantane
Common name
Adamantane
Chemical name
adamantane
CAS
281-23-2
SMILES
C1C2CC3CC1CC(C2)C3
InChI
InChI=1S/C10H16/c1-7-2-9-4-8(1)5-10(3-7)6-9/h7-10H,1-6H2
InChIKey
ORILYTVJVMAKLC-UHFFFAOYSA-N
Associated API
Amantadine Hydrochloride | Adamantane; Amantadine

Record ID: Af82fdf6e5f9e

Computed properties

C10H16 Molecular formula
136.238 g/molMolecular weight
136.1252 DaMonoisotopic exact mass
0 ŲTopological polar surface area
2.8326 Calculated LogP (Wildman–Crippen)
41.662 cm³/molMolar refractivity (Wildman–Crippen)
0 countHydrogen-bond acceptors
0 countHydrogen-bond donors

Descriptors are calculated from the displayed SMILES. Calculated LogP is not a measured partition coefficient or a pH-specific LogD.

Molecular descriptor profile

Descriptor radar

Mol. weight LogP TPSA HBA HBD Rotatable 25 50 75 100

Structural feature counts

0 2 4 Count H-bond acceptors H-bond donors Rotatable bonds Rings Aromatic rings Stereo centers

Element composition

C H 0 4 8 12 16 Number of atoms

Radar scale: 0–100 percentile within 25,771 distinct represented structures in this release, using the midpoint rank for ties. Larger values indicate a higher descriptor rank, not greater safety or toxicity. Element counts include hydrogen and combine isotopes under each element.

Radar values and percentile reference
DescriptorValuePercentile
Molecular weight136.2383.92
Calculated LogP (Wildman–Crippen)2.832658.46
Topological polar surface area00.50
Hydrogen-bond acceptors00.47
Hydrogen-bond donors011.28
Rotatable bonds (strict)03.45

Complete molecular descriptors

PropertyCalculated valueUnit / type
Molecular formulaC10H16dimensionless
Molecular weight136.238g/mol
Monoisotopic exact mass136.1252Da
Topological polar surface area0Ų
Calculated LogP (Wildman–Crippen)2.8326dimensionless
Molar refractivity (Wildman–Crippen)41.662cm³/mol
Hydrogen-bond acceptors0count
Hydrogen-bond donors0count
Rotatable bonds (strict)0count
Heavy atoms10count
Heteroatoms0count
Rings4count
Aromatic rings0count
Aliphatic rings4count
Saturated rings4count
Aromatic heterocycles0count
Aliphatic heterocycles0count
Saturated heterocycles0count
Aromatic carbocycles0count
Aliphatic carbocycles4count
Fraction of sp³ carbon atoms1fraction
Formal charge0e
Disconnected components1count
Isotopically specified atoms0count
Potential atom stereocenters0count
Unspecified atom stereocenters0count
Spiro atoms0count
Bridgehead atoms4count
Labute approximate surface area63.0062Ų
Valence electrons56count
Radical electrons0count
Bertz complexity91.588index
Balaban J1.8974index

Ring categories overlap and should not be summed. No toxicity result, PDE, HBEL or acceptable intake is inferred from these descriptors.

Toxicological services and resources for Adamantane

Qualification and safety assessment of Adamantane

Explore toxicological qualification of Adamantane and ICH M7 mutagenic impurity assessment of Adamantane for evaluation of this impurity in its pharmaceutical context.

Where data gaps need to be addressed, resources include read-across assessment for Adamantane and acceptable intake and limit justification for Adamantane. The relevant approach depends on the available evidence, exposure and duration of use.

Related Altox services and technical resources

Identity sources and calculation method

Identifiers originate from the source catalogues and available public identity records. InChI and InChIKey on this page are generated from the displayed SMILES. RDKit validation checks the molecular representation; it does not independently verify every catalogue assignment.

Discuss an assessment for Adamantane

Explore Altox services and software through the Altox Pharma-Hub.