GP-26 # has excellent alkali resistance, which is similar to GP-21 # and superior to GP-10 #. Suitable for: all room temperature strong alkaline media and strong alkaline media below 100 ℃ and with a pH value of 13 or below. Excellent acid resistance, suitable for any concentration of hydrochloric acid, sulfuric acid, sulfurous acid, hydrobromic acid, hydroiodic acid, chloroacetic acid, nitric acid, nitrous acid and other strong acid media below 120 ℃. More suitable for alkaline to acidic conditions, as well as acid-base neutralization reactions that ultimately result in alkaline conditions. High cost-effectiveness