1,3-环己二酮产品水分分析数据
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1,3-环己二酮作为重要的医药和农药中间体，是合成除草剂磺草酮、甲基磺草酮(硝黄草酮)的必备中间体，也是合成保护心血管的特效药卡维地洛和止吐药蒽丹西酮的重要中间体，还可用于合成异那朵林中间体4-苯并呋喃乙酸，用于合成镇痛药美他齐诺的中间体3-甲氧基-2-环己烯酮等。1,3-环己二酮同时还是抗血栓药物、抗肿瘤药物、镇痛药、杀病毒剂、5-HT拮抗剂等的重要原料，市场前景广阔。水分会影响化合物运输、存储过程中的稳定性以发生结块等现象，影响产品的品质，因此水分的检测是控制化合物质量的一项重要指标。通过对1,3-环己二酮产品水分分析，保障产品的品质，为下游产品的质量控制提供保障。企业生产的1,3-环己二酮产品，取样后参考GB/T 606-2003《化学试剂 水分测定通用方法》进行测试。1、数据输出：采用卡尔·费休水分测定仪，配制卡尔·费休试剂和水标准溶液，记录精确称取的加入水标准溶液中水的质量m1。采用“永停法”确定终点，使用卡尔·费休试剂分别滴定空白溶剂和水标准溶液，记录滴定溶剂空白时卡尔·费休试剂的用量V1和滴定水标准溶液时卡尔·费休试剂的用量V2。取样精确称重，记录样品的质量m2，配置样品溶液，使用卡尔·费休试剂滴定样品溶液，记录滴定样品时卡尔·费休试剂的用量V3。2、数据计算：根据公式计算卡尔·费休试剂的滴定度T：T=m1/(V2-V1)，单位g/mL；根据公式计算样品中水的百分含量X：X=V3*T/m2*100%。3、数据评价：样品中水的百分含量X符合客户要求则判定为合格。
1,3-Cyclohexanedione, as an important pharmaceutical and pesticide intermediate, is an essential intermediate for synthesizing herbicides sulcotrione and mesotrione, and also a key intermediate for synthesizing carvedilol (a specific drug for cardiovascular protection) and ondansetron (an antiemetic). It can also be used to synthesize 4-benzofuranacetic acid, an intermediate for isindoline, and 3-methoxy-2-cyclohexenone, an intermediate for the analgesic metazocine. Additionally, 1,3-cyclohexanedione is an important raw material for antithrombotic, antitumor, analgesic, antiviral agents and 5-HT antagonists, with broad market prospects. Moisture affects the stability of the compound during transportation and storage, causing issues such as caking and degrading product quality. Therefore, moisture detection is a critical indicator for controlling compound quality. Analyzing the moisture content of 1,3-cyclohexanedione products ensures product quality and provides guarantees for quality control of downstream products. For 1,3-cyclohexanedione products produced by enterprises, tests are conducted after sampling in reference to GB/T 606-2003 "General Methods for the Determination of Moisture in Chemical Reagents". 1. Data Output: A Karl Fischer moisture analyzer is used, with Karl Fischer reagent and water standard solution prepared. Precisely weigh the mass m₁ of water added to the water standard solution, and determine the endpoint via the dead-stop titration method. Titrate the blank solvent and the water standard solution separately with Karl Fischer reagent, recording the reagent consumption V₁ during the blank solvent titration and V₂ during the water standard solution titration. Precisely weigh the sample, record the sample mass m₂, prepare the sample solution, titrate it with Karl Fischer reagent, and record the reagent consumption V₃ during the sample titration. 2. Data Calculation: Calculate the titer T of Karl Fischer reagent using the formula: T = m₁/(V₂ - V₁), with the unit g/mL; Calculate the percentage moisture content X of the sample using the formula: X = (V₃ × T / m₂) × 100%. 3. Data Evaluation: The sample is judged as qualified if its moisture percentage content X meets the customer's requirements.
