C8H20N4
172.27 g/mol
Pharmaceutical IntermediateDanger
Cyclen
CAS294-90-6EC425-450-9
Category
Pharmaceutical Intermediate
Compound Class
Amine
Primary Use
Pharmaceutical Intermediate
Cyclen is a macrocyclic aza-crown ether compound used as a ligand for metal chelation. It serves as a key intermediate in the synthesis of the chelating agent DOTA, which has medical applications.
macrocyclic ligand for metal chelationsynthesis of the chelating agent DOTA
Content scope: Information here supports chemical identification and industrial supply, research, and manufacturing contexts. It is not a therapeutic claim, medical advice, or drug-use instructions.
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StrongStructure SimilarSimilarity 1.00
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Safety Reference
Danger
H302Harmful if swallowed
H312Harmful in contact with skin
H314Causes severe skin burns and eye damage
H400Very toxic to aquatic life
H410Very toxic to aquatic life with long lasting effects
H311Toxic in contact with skin
H318Causes serious eye damage
Customs Tariff Classification
The international HS code for Cyclen (CAS 294-90-6) is 2933.99.
HS code (international, 6-digit)
2933.99
EU CN code (8-digit)
2933 99 80
Classification per the EU customs inventory ECICS (2026-07 snapshot, HS 2022). National tariff lines and product form can affect the final classification.
Identifiers
IUPAC Name
1,4,7,10-tetrazacyclododecane
InChIKey
QBPPRVHXOZRESW-UHFFFAOYSA-N
SMILES
C1CNCCNCCNCCN1
Synonyms (8)
- 1,4,7,10-tetrazacyclododecane
- 10-tetraazacyclododecane
- Cyclen
- Gadobutrol Impurity 11
- KRYPTOFIX 11 AZA
- [12]aneN4
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