INTRODUCTION : Fruits (and, in some cases, vegetables) are sometimes covered with artificial waxing material. These waxing materials may be either natural or petroleum-based. Waxing are mainly done to prevent …

INTRODUCTION Acid gases/vapours and aerosols are highly corrosive and can irritate the eyes and mucous membranes of the nose, pharynx, and respiratory tract, even at low airborne concentrations. Hydrofluoric acid …