ちょっと一杯[chottoippai] let's have a quick drink
ばつ一[batsuichi] being once divorced
一向[hitaburu] nothing but
サラダ一皿[saradahitosara] plate of salad

安全第一[anzendaiichi] safety first
一か八か[ichikabachika] sink or swim
一っ走り[hitoppashiri] spin (as in 'take a car for a spin')
一つ一つ[hitotsuhitotsu] one-by-one

亜硝酸塩[ashousanen] nitrite
亜硫酸塩[aryuusanen] sulfite
一塩[hitoshio] slightly salted
塩っぱい[shoppai] salty
塩化[enka] chloride

塩化ビニル[enkabiniru] vinyl chloride
塩化水素[enkasuiso] hydrogen chloride
塩化物[enkabutsu] chloride
塩加減[shiokagen] seasoning (with salt)
塩基[enki] base