B19 Chemical Name O-tert-butylhydroxylamine hydrochloride CAS NO. 39684-28-1 Molecular formula C4H11NO.HCl Molecular weigh 125.6 Content 98% Appearance White or off-white crystal melting point 158-159℃(lit.) Chemical Name O-tert-butylhydroxylamine hydrochloride CAS NO. 39684-28-1 Molecular formula C4H11NO.HCl Molecular weigh 125.6 Content 98% Appearance White or off-white crystal melting point 158-159℃(lit.)