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Pharmaceutical impurity

N-(4-Chlorobenzene) -1,2-phenylenediamine

N-(4-Chlorobenzene) -1,2-phenylenediamine is listed in the pharmaceutical impurity collection under CAS 68817-71-0. Its represented structure has formula C12H11ClN2 and a calculated molecular weight of 218.69 g/mol.

2D chemical structure

N H 2 N H C l

Chemical identity

Catalog name
N-(4-Chlorobenzene) -1,2-phenylenediamine
Common name
Not available
Chemical name
2-N-(4-chlorophenyl)benzene-1,2-diamine
CAS
68817-71-0
SMILES
Nc1ccccc1Nc1ccc(Cl)cc1
InChI
InChI=1S/C12H11ClN2/c13-9-5-7-10(8-6-9)15-12-4-2-1-3-11(12)14/h1-8,15H,14H2
InChIKey
WEUBIWJPIRTWDF-UHFFFAOYSA-N

Record ID: A03bf6503da91

Computed properties

C12H11ClN2 Molecular formula
218.687 g/molMolecular weight
218.0611 DaMonoisotopic exact mass
38.05 ŲTopological polar surface area
3.6658 Calculated LogP (Wildman–Crippen)
65.5891 cm³/molMolar refractivity (Wildman–Crippen)
2 countHydrogen-bond acceptors
2 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 1 2 Count H-bond acceptors H-bond donors Rotatable bonds Rings Aromatic rings Stereo centers

Element composition

C Cl H N 0 3 6 9 12 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 weight218.68722.26
Calculated LogP (Wildman–Crippen)3.665873.55
Topological polar surface area38.0519.88
Hydrogen-bond acceptors215.92
Hydrogen-bond donors264.87
Rotatable bonds (strict)224.16

Complete molecular descriptors

PropertyCalculated valueUnit / type
Molecular formulaC12H11ClN2dimensionless
Molecular weight218.687g/mol
Monoisotopic exact mass218.0611Da
Topological polar surface area38.05Ų
Calculated LogP (Wildman–Crippen)3.6658dimensionless
Molar refractivity (Wildman–Crippen)65.5891cm³/mol
Hydrogen-bond acceptors2count
Hydrogen-bond donors2count
Rotatable bonds (strict)2count
Heavy atoms15count
Heteroatoms3count
Rings2count
Aromatic rings2count
Aliphatic rings0count
Saturated rings0count
Aromatic heterocycles0count
Aliphatic heterocycles0count
Saturated heterocycles0count
Aromatic carbocycles2count
Aliphatic carbocycles0count
Fraction of sp³ carbon atoms0fraction
Formal charge0e
Disconnected components1count
Isotopically specified atoms0count
Potential atom stereocenters0count
Unspecified atom stereocenters0count
Spiro atoms0count
Bridgehead atoms0count
Labute approximate surface area93.6815Ų
Valence electrons76count
Radical electrons0count
Bertz complexity451.4342index
Balaban J2.2218index

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 N-(4-Chlorobenzene) -1,2-phenylenediamine

Qualification and safety assessment of N-(4-Chlorobenzene) -1,2-phenylenediamine

Explore toxicological qualification of N-(4-Chlorobenzene) -1,2-phenylenediamine and ICH M7 mutagenic impurity assessment of N-(4-Chlorobenzene) -1,2-phenylenediamine for evaluation of this impurity in its pharmaceutical context.

Where data gaps need to be addressed, resources include read-across assessment for N-(4-Chlorobenzene) -1,2-phenylenediamine and acceptable intake and limit justification for N-(4-Chlorobenzene) -1,2-phenylenediamine. 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 N-(4-Chlorobenzene) -1,2-phenylenediamine

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