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Chemical product profile

HONGKUN / PRODUCT DIRECTORY

Ceftazidime dihydrochloride | CAS 73547-70-3

A defined hydrochloride form of ceftazidime for research and analytical development, with chloride stoichiometry, water and ceftazidime-equivalent content requiring explicit specification.

CAS73547-70-3
Molecular formulaC22H24Cl2N6O7S2
Molecular weight619.5 g/mol

Product overview

Ceftazidime combines a cephalosporin core with an aminothiazole-containing oxime side chain and a pyridinium substituent. This record identifies its dihydrochloride, with two HCl equivalents included in the formula. That salt identity differs from ceftazidime pentahydrate and changes mass-based concentration calculations. Water content and the reported assay basis are therefore essential when comparing proposed material or preparing analytical solutions.

Chemical identity

Chemical name
Ceftazidime dihydrochloride
CAS number
73547-70-3
Molecular formula
C22H24Cl2N6O7S2
Molecular weight
619.5 g/mol

Application context

The dihydrochloride is described in research-reagent literature for ceftazidime-related antibacterial and analytical work. Its value to an experimental or development programme lies in supplying a specified chemical form with a known content basis. When a method reports concentration as ceftazidime rather than as the complete salt, calculations must account for chloride and water. Select the impurity method, reference value and any biological activity requirement according to the intended study; pharmaceutical formulations require their own qualified composition.

Chemistry and synthetic role

The pyridinium-containing molecule has several ionizable groups. The dihydrochloride formula describes the supplied salt stoichiometry, while oxime geometry and beta-lactam stereochemistry remain identity attributes.

Quality review

Chloride stoichiometry

Confirm the dihydrochloride form and the method used to establish counterion content.

Ceftazidime-equivalent assay

State whether results are expressed as the whole salt or ceftazidime, on an as-is or corrected basis.

Water and related substances

Review water together with a method addressing relevant beta-lactam degradation products and isomeric species.

Preparing a specification

Specify the dihydrochloride, chloride-content method, water and assay expression; include an isomer/degradation profile appropriate to the ceftazidime method.

Packaging and storage

Confirm container compatibility, closure and net weight for the selected grade and destination. Follow the actual supplier SDS and batch label for storage and transport.

Documentation

Request the batch COA, SDS and analytical methods covering the agreed purchasing specification. Confirm which supporting chromatograms and application-specific records are available from the selected manufacturer.

Procurement questions

Is this ceftazidime pentahydrate?

No. The catalogue identity is the dihydrochloride salt.

Can equal masses of different ceftazidime forms give equal concentration?

Not without correcting for salt composition, water and assigned content.

Does a chloride result alone establish identity?

It supports salt stoichiometry, but the ceftazidime structure and related substances also need confirmation.

Technical sources
  1. PubChem CAS identity lookupNCBI / PubChem
  2. Ceftazidime dihydrochlorideSanta Cruz Biotechnology
  3. Ceftazidime dihydrochlorideNCATS GSRS