Forensic Medicine Toxicology - 1 cbbcbe10 Which is a better preservative for urine in viscera packing A Concentrated Hydrochloric acid B Thymol C Toluene D Sodium fluoride High-Yield Explanation - Concentrated Hydrochloric acid, Thymol, Toluene, Sodium fluoride used to preserve urine - Of which, Toluene is better.