Can propanal can be written as C3H6O ?? Share with your friends Share 0 Rishabh Mittal answered this Dear Student, C3H6O can be written for propanal but it can also be written for propanone.So, to avoid confusion propanal is written as C2H5CHO . Regards 1 View Full Answer Neel answered this no C3H60 is the formula for propanaldehyde 0 Tanya Shankar answered this NO 0 Annapurna Shobitha answered this Please find this answer 0 Akshidh Ar answered this nop 0