Collection: Compounds Purified by Zone Refinement
Compounds Purified by Zone Refinement — collects organic compounds purified through multi-stage zone refining, i.e., repeated melting and re-solidification along the length of a solid rod to separate impurities based on solubility differences between the liquid and solid phases.
Compounds Purified by Zone Refinement are used as high-purity reference materials in analytical instrument calibration, standard melting point determination, and fundamental physicochemical research that is sensitive to even trace impurities. Analytical chemistry and metrology researchers use them for method validation and preparation of standard solutions with a matrix background that causes minimal interference.
Example products in this collection: TCI B0224 92-52-4 Biphenyl Zone Refined (number of passes:24), TCI C0022 105-60-2 epsilon-Caprolactam Zone Refined (number of passes:24), TCI B0222 119-53-9 Benzoin Zone Refined (number of passes:40), TCI C0636 140-10-3 trans-Cinnamic Acid Zone Refined (number of passes:40), TCI B0221 134-81-6 Benzil Zone Refined (number of passes:22), TCI C0726 118-91-2 2-Chlorobenzoic Acid Zone Refined (number of passes:20), TCI B0220 55-21-0 Benzamide Zone Refined (number of passes:20), TCI D0297 106-37-6 1,4-Dibromobenzene Zone Refined (number of passes:31).
Pay attention to the number of purification cycles (number of passes) listed, as a higher number of cycles generally correlates with higher purity and suits stringent analytical reference needs. All products are genuine Tokyo Chemical Industry (TCI) Japan products, with purity, packaging, and storage conditions listed on each item's page.
Other parallel categories under High Purity Compounds, often used together in one laboratory workflow:
Back to High Purity Compounds. For large-volume procurement, special packaging, or specific grades, contact the AMI Scientific team — official TCI Japan distributor in Indonesia — to check availability and lead time directly from Japan.
