C6Cl4N4
269.9 g/mol
Pharmaceutical IntermediateWarning
Tetrachloropyrimido(5,4-d)pyrimidine
CAS32980-71-5EC251-318-3
Category
Pharmaceutical Intermediate
Compound Class
Heterocycle
Primary Use
Pharmaceutical Intermediate
Tetrachloropyrimido(5,4-d)pyrimidine is a highly chlorinated heterocyclic compound used as a pharmaceutical intermediate. It features a fused pyrimidine ring system with four chlorine substituents.
Pharmaceutical intermediate
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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Related Compounds
ReferenceSame Category
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CAS32981-85-4
pharmaceutical intermediate
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10-deacetylbaccatin III
CAS32981-86-5
pharmaceutical intermediate
ReferenceSame Category
(1S)-2-chloro-1-(2,4-difluorophenyl)ethanol
CAS330156-49-5
pharmaceutical intermediate
ReferenceSame Category
(R)-1-(2,6-Dichloro-3-fluorophenyl)ethanol
CAS330156-50-8
pharmaceutical intermediate
Safety Reference
Warning
H315Causes skin irritation
H319Causes serious eye irritation
Customs Tariff Classification
The international HS code for Tetrachloropyrimido(5,4-d)pyrimidine (CAS 32980-71-5) is 2933.59.
HS code (international, 6-digit)
2933.59
EU CN code (8-digit)
2933 59 95
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
2,4,6,8-tetrachloropyrimido[5,4-d]pyrimidine
InChIKey
QNKFHUMDHRWWES-UHFFFAOYSA-N
SMILES
C12=C(C(=NC(=N1)Cl)Cl)N=C(N=C2Cl)Cl
Synonyms (13)
- Pyrimido[5, tetrachloro-
- tetrachloropyrimidopyrimidine
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