Ensure your full compliance when transporting phosphoric acid with Labelmaster's UN 1805 Corrosive Placards. Pre-printed with the four-digit UN Number, these DOT placards are what you need for shipping Phosphoric Acid and meeting the requirements of 49 CFR 172.500 for domestic and international shipments of hazardous materials by highway, rail and water. They are printed on polycoated tagboard that is exceptionally resistant to buckling and blowouts in all weather conditions. Recommended for us in Slidemaster holders, these Hazard Class 8 placards measure 273 x 273mm and are sold in packs of 25.