苯甲酸

关于此产品
苯甲酸是最简单的芳香族羧酸,分子式为C7H6O2,CAS号为65-85-0,欧盟食品添加剂编号为E210。它天然存在于蔓越莓、西梅、肉桂和丁香中,食品用产品通过甲苯部分氧化法制得。产品为白色结晶粉末或片状,具有微弱的香脂气味,微溶于冷水,易溶于乙醇。
其防腐作用取决于pH值。只有未解离的酸能够穿过微生物细胞膜,在细胞内使细胞质酸化并破坏能量代谢,而苯甲酸的pKa约为4.2。实际使用中,pH高于4.5时活性急剧下降,在pH 2.5至4.0之间活性最强。它对酵母和霉菌最为有效,对细菌的作用较弱。若产品酸度较低,或需要冷水溶解性,则改用其钠盐。
典型用量为0.05%至0.1%,相当于500至1,000 ppm,应用于碳酸饮料、果汁、腌渍蔬菜、酱料、调味汁和果酱。有一项配方注意事项已有充分记载:苯甲酸盐与抗坏血酸共存时,在受热或光照条件下可能生成痕量苯,因此同时含有两者的饮料需要进行评估,而不能直接假定其安全。
Bio Green Foods 按食品级规格供应苯甲酸,依据适用的专论确认含量、熔程、重金属和灼烧残渣。
规格
应用
参考价格: $1.00–8.50/kg
价格会根据市场供需变化。请联系我们的销售团队获取最新报价。
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