Form
Powder
Appearance
Whitecrystallinepowder
Source
Synthetic
WaterContent(KarlFisher)
≤0.5%
MeltingPoint
189-191°C
Assay
99.0-100.5
Pyrazinamideisasparinglysolublebactericidalantituberculardrug.
98-96-4
C5H5N3O
123.11
Themechanismofpyrazinamideisnotentirelyunderstood.Itisspeculatedthatpyrazinamideentersatargetcellandisconvertedintopyrazinoicacid(POA)whichdisruptsnormalmembranepermeABIlityfunctions.InternalpHofthecellbeginstodecreaseasPOAaccumulatesinthecell’scytoplasmwhichisthoughttoinhibitfattyacidsynthaseactivity.
2-8°C
2933.99.4200
PyrazinamideisusedalmostexclusivelyagainstMycobacteriumtuberculosis.
Powder
Whitecrystallinepowder
Synthetic
≤0.5%
189-191°C
99.0-100.5