4-Vinylphenylboronic acid , with CAS number of 2156-04-9, can be called 4-vinylphenylboronic acid ; 4-boronostyrene ; rarechem ah pb 0202 ; p-styrylboronic acid ; p-vinylphenylboronic acid ; Styrene-4-boronic acid~4-Vinylphenylboronic acid . It is a white light beige crystalline powder.