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  • Product Name:   4-Aminobenzoic acid
  • Synonyms:   
  • CAS No.:   150-13-0
  • Molecular Formula:   C7H7NO2
  • Molecular Weight :   137.14
  • Specification :   98%
  • Place of Origin:   China
  • Appearance :   
  • Document :   Download

Description of 4-Aminobenzoic acid



对氨基苯甲酸 性质


熔点  187-189 °C(lit.)


沸点  251.96°C (rough estimate)


密度  1.374 g/mL at 25 °C(lit.)


折射率  1.5323 (estimate)


闪点  250 °C


储存条件  2-8°C


溶解度  95% ethanol: soluble5%, clear to slightly hazy, colorless to yellow


形态 Crystalline Powder


酸度系数(pKa) 2.50, 4.87(at 25℃)


颜色 White to light yellow


PH值 3.5 (5g/l, H2O, 20℃)


水溶解性  4.7 g/L (20 ºC)


敏感性  Air & Light Sensitive


Merck  14,423


BRN  471605


稳定性 Stable. Incompatible with strong oxidizing agents. Combustible. Sensitive to light and air. May discolour on exposure to light.


CAS 数据库 150-13-0(CAS DataBase Reference)


NIST化学物质信息 p-Aminobenzoic acid(150-13-0)


EPA化学物质信息 Benzoic acid, 4-amino-(150-13-0)




对氨基苯甲酸 用途与合成方法


化学性质  无色针状晶体。在空气中或光照下变为浅黄色。 易溶于热水、乙醚、乙酸乙酯、乙醇和冰醋酸,难溶于水、苯,不溶于石油醚。


用途  用作医药、染料中间体


用途  染料和医药中间体。用于生产活性红M-80,M-10B,活性红紫X-2R等染料以及制取氰基苯甲酸生产药物对羧基苄胺。对氨基苯甲酸可用作防晒剂,其衍生物对二甲氨基甲酸辛酯,是优良的防晒剂,商品名称Padimate O.


用途  Widely distributed in nature as a B complex factor. Baker鈥檚 yeast contains 5 to 6 ppm, brewer鈥檚 yeast from 10 to 100 ppm. Occurs free and in ester form.


用途  用作测定铜的试剂。用于酯类、叶酸和偶氮染料的合成。


用途  用作分析试剂、防晒剂,也用于制药及染料工业


生产方法  在反应锅内依次加入水、氯化钠、盐酸。开动搅拌并升温至50-60℃,加入9/10量的铁粉,继续升温到98-102℃,保温1h,停止加热,于95℃慢慢加入对硝基苯甲酸,约1-1.5h加完,补加铁粉,在98-102℃保温1h,放冷至80℃,加入30%液碱调节pH=8.5-9,压滤,用少量水洗,滤液与少量洗液合并,压入酸析锅,冷至30-34℃,加入保险粉脱色,过滤。滤液加酸调节pH=3.5-4,继续冷至10℃以下,甩水、干燥即得成品。收率84-88%。(2)由对硝基苯甲酸经催化加氢而得在1000ml烧杯中加入工业品对硝基苯甲酸及水,在搅拌下用22%氢氧化钠调整pH=6-7,然后加阮尼镍,在搅拌下把料液抽入摇摆式高压釜中,分别用氢气、氮气各置换两次、再充压至3.43MPa,在压力3.43-2.54MPa、温度134-140℃下反应5h左右,至氢压不下降为终点。反应结束后过滤、干燥而得成品。收率80%以上。


类别 有毒物品


毒性分级 中毒


急性毒性 口服-小鼠LD50: 2850 毫克/公斤; 口服-兔子LD50: 1000 毫克/公斤


可燃性危险特性 可燃;燃烧产生有毒氮氧化物烟雾


储运特性 库房通风低温干燥


灭火剂 干粉、泡沫、砂土、二氧化碳, 雾状水




安全信息


危险品标志  Xn,Xi


危险类别码  22-36/37/38-43


安全说明  26-36-37/39


WGK Germany  3


RTECS号 DG1400000


TSCA  Yes


海关编码  29224995


毒害物质数据 150-13-0(Hazardous Substances Data)


毒性 LD50 in mice, rats (g/kg): 2.85, >6.0 orally (Scott, Robbins); LD50 in rabbits (g/kg): 2.0 i.v. (Richards); 1.83 orally (Cronheim)


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