γ-氨基丁酸25kg/55000元吨[分子式]***H9NO4[外观]白色结晶粉末含量98.5%~101.0%分子量：103.1熔点197℃~204℃透光率≥98%氯化物≤0.04%***盐(SO4)≤0.05%铁(Fe)≤10ppm***(Pb)≤10ppm***含量(As2O3)≤1ppm干燥失重≤0.5%灼烧残渣≤0.1%PH值6.5~7.5)