中文
Di-tert-butyl dicarbonate is also known as BOC anhydride, which is abbreviated as diboc in English. It is used to introduce amino acid protection genes in organic synthesis, especially in amino acid protection, widely used in medicine, protein and peptide synthesis, biochemical food, cosmetics and other products. As an intermediate synthetic protective agent, its quality directly affects its utility and downstream product quality.
For all users of di-tert-butyl dicarbonate, how to identify the quality of products after receiving the goods is a difficult problem.
To identify high-quality di-tert-butyl dicarbonate, we should start from the following aspects:
1. Appearance:
The appearance of high-quality di-tert-butyl dicarbonate product should be colorless and transparent liquid or crystal. If the appearance of the product is slightly yellow, it indicates that the solvent content in the product is high, which is not a high-quality product.
2. Main content:
This indicator is a necessary item in the product analysis sheet. Although there are many domestic suppliers of this product, the content is generally more than 99%, and there are few more high-quality products. The main content of di-tert-butyl dicarbonate produced by Nanjing Shunxiang is usually higher than 99.5%. It is difficult for similar enterprises to meet this standard.
3. Moisture content:
The water content of high quality di-tert-butyl dicarbonate should be less than 0.01%.
4. Impurities:
The lower the impurity content, the higher the purity of the product. The impurity content of di-tert-butyl dicarbonate supplied by Nanjing Shunxiang is usually less than 0.019%, and there are almost no other impurities in high-purity di-tert-butyl dicarbonate.
5. Stability:
High quality Di-tert-butyl dicarbonate, little affected by temperature, not easy to decompose, easy to transport, easy to preserve. According to the data statistics of Jinxiang chemical industry for 8 years, the main content of stable and high-quality BOC anhydrides decreased by only 0.2-0.3% in 40 days at the melting point of 22-25 ℃.
6. Solvent composition:
Compliance with FDA solvent safety standards. In recent years, Jinxiang chemical industry has produced high-quality di-tert-butyl dicarbonate, which contains no impurities of isopropyl group and sec-butyl group, and no heavy metal impurities by refining the process and repeated tests and using the solvent completely within the scope of FDA regulations.