精确称取试样约3.5g,移入一烧瓶中,加入1mol/L氢氧化钠液40.0ml,并用水冲洗烧瓶侧壁。盖上表面皿,小火煮沸1小时后冷却,用1mol/L硫酸滴定过量的氢氧化钠至pH=6.5。同时进行空白试验并作必要校正。每毫克1mol/L氢氧化钠相当于本品(C14H20O3)236.3mg(以干基计)。
毒性可安全用于食品(FDA,§172.145,2000)。
使用限量无色细小晶体或白色结晶性粉末。无臭或略有特殊气味及焦糊味。极易溶于水,易溶于乙醇和乙醚。
用途防腐剂;抗微生物剂。
生产方法由对羟基苯甲酸与庚醇在硫酸存在下制得。
类别有毒物质
毒性分级中毒
急性毒性皮下注射 - 小鼠 LD50: 4000 毫克/公斤
可燃性危险特性可燃,火场排出辛辣刺激烟雾
储运特性库房低温、通风、干燥
灭火剂水、二氧化碳、干粉、砂土
Oestrone sulphatase is an important target in the fight against hormone-dependent breast cancer. In an effort to investigate the reported definitive pharmacophore for oestrone sulphatase and continue our search for potent inhibitors of this enzyme, we have undertaken extensive synthesis, biochemical evaluation and physicochemical property determination of a range of benzoic acid based esters. Here, we report the initial results of our study into a series of straight chain alkyl esters of 4-sulphonylbenzoic acid. Using these compounds, we have investigated the involvement of two physicochemical properties, namely logP and pKa. The results of this study show that there was a strong correlation between the inhibitory activity and the logP of the parent compound. Within the series of compounds studied, hydrophobicity appears to be a more important factor than pKa in determining the overall inhibitory activity. In a previous report, we showed that pKa plays an important role in stabilizing the phenoxide ion resulting from the hydrolysis of the sulphamate group. Here, we propose that although pKa is an important factor in determining the overall inhibitory activity when a wide range of compounds are considered, both hydrophobicity and pKa need to be considered in the design of potential inhibitors of oestrone sulphatase.