[¦ī·sə‚nik·ə′tin·ik ′as·əd] (organic chemistry) C6H5NO2 White platelets or powder, slightly soluble in water, sublimes at 260°C; used in the manufacture of isonicotinic acid hydrazide, an antitubercular agent.
isonicotinic acid
i·so·nic·o·tin·ic ac·id
(ī'sō-nik'ō-tin'ik as'id), The substance of which the hydrazide is isoniazid.