GB/T 2385-2007 "General Method for Determination of Crystallizing Point of Dye Intermediates" specifies a general method for determining the crystallizing point of dye intermediates using the double-tube method, which is applicable to dye intermediates with crystallization temperatures ranging from -10°C to 150°C. The sample is melted by heating and then slowly cooled, and the temperature at crystallization is recorded. The test requires instruments such as a double-tube crystallizing point apparatus, thermometer, stirrer, constant-temperature water bath, or oil bath, providing a basis for assessing the purity and quality control of dye intermediates.
This summary is not the original standard text and is for reference only. For accurate information, please obtain it through official channels.
| Status | Active | ||
|---|---|---|---|
| CCS | G55 | ICS | 87.060.10;71.100.01 |
| Release Date | 2007-11-28 00:00:00 | Implementation Date | 2008-06-01 00:00:00 |
