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HuagongsheHuagongshe Chemistry Print Report · For research reference only
HCID 16Generated: October 27, 2026

1,8-Diazacyclotetradecane-2,9-dione

Caprolactam Dimer · Adipic Acid Impurity 76 · Caprolactam cyclic dimer · Aminocaproic acid Impurity K · 1,8-diazacyclotetradecane-2,9-dione · 7,14-diazacyclotetradecane-1,8-dione

https://huagongshe.com/en/chemical/16

1,8-Diazacyclotetradecane-2,9-dione molecular structure

Identifiers & Physical Properties

CAS No.56403-09-9
Molecular formulaC12H22N2O2
Average molar mass226.32 g/mol
Monoisotopic mass226.16812795 g/mol
SMILESO=C1CCCCCNC(=O)CCCCCN1
InChIKeyHERSSAVMHCMYSQ-UHFFFAOYSA-N
PubChem CID16
ChEBICHEBI:16968
EC No.611-385-5
DTXSIDDTXSID90204974

Chemical & Physical Properties

XLogP0.6
Topological polar surface area58.2
Hydrogen bond donors2
Hydrogen bond acceptors2
Rotatable bonds0
Heavy atoms16
Formal charge0
Complexity205
Melting point341 °C
Boiling point497.8±38.0 °C(Predicted)
Density0.969±0.06 g/cm3(Predicted)
SolubilityDMSO (Slightly, Heated), Methanol (Slightly, Heated)
Physical stateSolid
pKa (acidity coefficient)16.05±0.20(Predicted)
ColorWhite to Off-White
FDA UNIILIJ968E05S
GHS pictogramGHS07
Signal wordWarning
GHS hazard statementsH302-H315-H319-H335
GHS precautionary statementsP280-P305+P351+P338

Safety & Regulations

Signal wordWarning
GHS pictogramGHS07
GHS hazard statementsH302-H315-H319-H335
GHS precautionary statementsP280-P305+P351+P338

Applications & Uses

Uses

1,8-Diaza-2,9-diketocyclotetradecane is a dimer of Caprolactam (C175665), an amonomer used in the production of nylon-6 and other synthetic polymers.