Ko e mafana ʻo e ignition ʻo e meʻa ni ko e 30 ° c, pea ʻoku ʻi ha tuʻunga gaseous. Ko hono mamafa molecular ko 33.997 mo e 58 g/mol.
ʻOku colorless ʻa e koloa pea ʻoku ʻi ai hono nanamu makehe resembling musita mo e garlic, Neongo ʻoku faʻa fakakeheʻi ʻe he ngaahi meʻa lalahi ha nanamu ʻoku tatau mo e ika pala.