# What is the weak ionization constant (K_a) for HCNO equal to?

##### 1 Answer
Nov 24, 2017

Well, you'll to have use google to search for the ${\text{pK}}_{a}$ of fulminic acid (not to be confused with isocyanic acid, $\text{HNCO}$).

There is one for it dissolved in DMSO, "pK"_a("DMSO") = -1.07. Good luck finding one for it dissolved in water... $\text{HCNO}$ is toxic and used in explosives.