对羟基苯甲酸乙酯

白色结晶或结晶性粉末。无气味。易溶于乙醇、乙醚和丙酮，微溶于水、氯仿、二硫化碳和石油醚。有轻微特殊香气，味微苦，灼麻。半数致死量(小鼠，腹腔)520mg/kg。有刺激性。
熔点：115-118 °C
沸点：178 °C / 11mmHg

项目                                    分析纯
                                         (AR)
纯度Purity                              ≥99.0%
熔点Melting point                       115-118°C
酸度(PH)                                 合格
硫酸盐(以SO₄^2-计),%                     ≤0.01
对羟基苯甲酸及水杨酸                     合格
灼烧残渣Ignition residue,%              ≤0.05
干燥失重Drying loss,%                   ≤0.5
氯化物chloride,%                        ≤0.01
砷(As),%                                ≤0.0001
重金属(以Pb计),%                        ≤0.001


项目                                    化学纯    
                                         (CP)
pH（50g/L，25℃）                      4.0~7.0  
含量                                   ≥99.0%  
硫酸盐                                 ≤0.04%  
氯化物                                 ≤0.35%  
熔点/℃                                112.0～118.0  
水杨酸                                  ≤0.1%  
灼烧残渣                                ≤0.1%