i think i know the particles you are talking about. are they reddish or orangish in color, small, and there are very few of them? i had the same thing, also the cloudiness. i warmed up the 100ml vial and refiltered it with a 22um whatman into three 30 ml vials. the particles are gone now but it still gets cloudy when it returns to room temp. from what i have read, the cloudiness is not anything to be worried about but i would absolutely not shoot anything solid into my body. get rid of the solid particles. filters are cheaper than an abscess so i wouldn't risk it.