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Pyrimidine

Names Preferred IUPAC namePyrimidineSystematic IUPAC name1,3-DiazabenzeneOther names 1,3-Diazinem-DiazineIdentifiers CAS Number289-95-23D model (JSmol)Interactive imageBeilstein Reference103894 ChEBICHEBI:16898ChEMBLChEMBL15562ChemSpider8903ECHA InfoCard100.005.479EC Number206-026-0Gmelin Reference49324 KEGGC00396MeSHpyrimidinePubChemCID9260UNIIK8CXK5Q32LCompTox Dashboard(EPA)DTXSID1051228InChIInChI=1S/C4H4N2/c1-2-5-4-6-3-1/h1-4HKey: CZPWVGJYEJSRLH-UHFFFAOYSA-NInChI=1/C4H4N2/c1-2-5-4-6-3-1/h1-4HKey: CZPWVGJYEJSRLH-UHFFFAOYATSMILESn1cnccc1Properties Chemical formulaC4H4N2Molar mass80.088 g mol Density1.016 g cm Melting point20 to 22 °C (68 to 72 °F; 293 to 295 K) Boiling point123 to 124 °C (253 to 255 °F; 396 to 397 K) Solubility in waterMiscible (25°C) Acidity (pKa) 1.10 (protonated pyrimidine) Hazards GHS labelling:[1]PictogramsSignal wordDangerHazard statementsH226, H318Precautionary statementsP210, P233, P240, P241, P242, P243, P264+P265, P280, P303+P361+P353, P305+P354+P338, P317, P370+P378, P403+P235, P501Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).Yverify ( ?)

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