南箭牌 没食子酸

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                
没食子酸
中文名称: 没食子酸
中文同义词: 棓酸;倍酸;石墨酸;3,4,5-三羟基苯甲酸,无水的;氧化石墨;3,4,5-三羟基苯甲酸;没食子酸;没食子酸(无水)
英文名称: Gallic acid
英文同义词: TIMTEC-BB SBB008781;RARECHEM AL BE 0070;3,4,5-trihydroxy-benzoicaci;gallic;Gallussaure;Kyselina 3,4,5-trihydroxybenzoova;Kyselina gallova;kyselina3,4,5-trihydroxybenzoova
CAS号: 149-91-7
分子式: C7H6O5
分子量: 170.12
EINECS号: 205-749-9
相关类别: Pharmaceutical Intermediates;Aromatic Carboxylic Acids, Amides, Anilides, Anhydrides & Salts;羰基化合物;中药对照品;标准品;对照品,标准品;植物提取物;chemical reagent;pharmaceutical intermediate;phytochemical;reference standards from Chinese medicinal herbs (TCM).;standardized herbal extract;对照品
Mol文件: 149-91-7.mol
性状：白色或浅褐色针状结晶或粉末。熔点235-240℃（分解）。加热至100-120℃失去结晶水，加热至200℃以上时失去二氧化碳而生成焦性没食子酸（即连苯三酚）。溶于热水、乙醚、乙醇、丙酮和甘油，难溶于冷水，不溶于苯和氯仿。
用途：

1、没食子酸在制药，墨水，染料，食品，轻工和有机合成等方面有许多用途。没食子酸与三价铁离子生成蓝黑色沉淀，是蓝黑墨水的原料；工业上也用于制革；还可做照相显影剂。没食子酸丙酯为抗氧剂，可用于食用油脂以防腐臭变质。在医药上没食子酸是止血收敛剂，也是温和的局部刺激剂。
2、具有抗菌作用，可治疗菌痢。具有收敛、止血、止泻作用。可用作防腐剂。可制备焦性没食子酸、药物、墨水、媒介染料和防爆剂等。还用作显影剂和检测游离无机酸、二羟基丙酮、生物碱和金属等的分析试剂。
3、可用作防腐剂，可制备媒介染料和防爆剂等
4、用作化学试剂
5、主要用作蓝黑墨水的成色剂。医药工业用于制备磺胺增效药TMP及用作SMZ、SD乙等磺胺药的配合剂。食品工业用于制备防腐剂没食子丙酯。国防工业用于制备防爆剂。另外，还可用于媒染性染料的生产和用作显影剂等

生产方法：

    由五倍子制得。五倍子的主要成分为单宁酸，属水解类单宁，能溶于热水，具有涩味，是和种无定形的复杂有机物。我国五倍子单宁酸是由五倍子酸、双倍酸与葡萄糖结合以甙或酯的形式形成的复杂混合物。单宁酸经加压水解即生成没食子酸和葡萄糖。水解时先生成以没食子酸酯，再由双没食子酸酯水解成没食子酸，水解温度为133-135℃，压力为0.18-0.2MPa。从升压至0.18MPa开始反应保持2h即达终点。与常压水解比较，可节约硫酸和蒸汽，生产能力可提高25%。

含量：99%
包装：25Kg纸板桶
价格：84元/Kg