1-Chlorophthalazine hydrochloride

1-Chlorophthalazine hydrochloride corresponds to CAS 300843-36-1, formula C8H6Cl2N2, and PubChem CID 22386464. PubChem represents the entry with SMILES C1=CC=C2C(=C1)C=NN=C2Cl.Cl and InChIKey VWXKUBPEUUXLPV-UHFFFAOYSA-N. The full identifier set matters here because the hydrochloride wording is part of the recorded substance identity.

The main fragment is a phthalazine fused-ring system bearing chlorine at position 1. After that connected fragment, the SMILES includes a dot and a separate chloride component; the molecular formula consequently contains two chlorine atoms across the complete entry. Omitting hydrochloride would no longer describe the same cited record. That distinction explains why the complete formula cannot be inferred from the neutral fragment alone. Conversely, the separate component should not be mistaken for a second chlorine substituent on the fused ring, because the string distinguishes covalent and disconnected parts explicitly.

Correspondence about this entry should preserve the complete name 1-Chlorophthalazine hydrochloride and CAS 300843-36-1. PubChem CID 22386464 provides the public record, and VWXKUBPEUUXLPV-UHFFFAOYSA-N makes a concise cross-database check. If Rlavie receives a target drawing, it can be compared with both portions of the cited SMILES before request-specific information is returned. Supplying the requested quantity with those identifiers also helps separate this hydrochloride entry from the neutral parent or another phthalazine form.