Package: 25kg 50kg drum or bag

Uses : 3,4,9,10-Perylene tetracarboxylic dianhydride is mainly used as a key intermediate for synthesizing perylene-based dyes and pigments. Its applications are based on excellent thermal stability and light resistance, specifically including: used for coloring

Molecular Structure:

Product description: What is the chemical of 3,4,9,10-Perylenetetracarboxylic diimide? Appearance: Purple-red powder or dark red powder； Assay:99%min by HPLC； IR Identity: conform to standard； HNMR： conform to standard； carbon spectrum: conform to standard； Water by K. F.:0.5% max or as per the customer’s request； Loss on drying:0.5% max. or as per the customer’s request； ========================================================================== use: Appearance: Purple-red powder or dark red powder； Assay:99%min by HPLC； IR Identity: conform to standard； HNMR： conform to standard； carbon spectrum: conform to standard； Water by K. F.:0.5% max or as per the customer’s request； Loss on drying:0.5% max. or as per the customer’s request； ============================================================================= Synthesis route: The standard synthetic route for 3,4,9,10-perylenetetracarbodiimide (PTCDI) is the imidization reaction of 3,4,9,10-perylenetetracarboxylic dianhydride with ammonia water (or concentrated ammonia solution). • Raw materials: Perylene-3,4,9,10-tetracarboxylic dianhydride and excess ammonia water (usually 2 equivalents or more). • Conditions: Reflux and heat in ethanol/water mixed solvent or directly in ammonia solution for 4-6 hours (at a temperature of approximately 78-80 ° C); Or react in a closed pressure vessel at 100-120 ° C. • Product: Generate purple red 3,4,9,10-perylenetetracarbodiimide (C ₂₄₁₀ N ₂ O ₄), which is cooled, filtered, washed (usually ethanol, ether or dilute acid) and dried to obtain the finished product, with a yield usually>90%. Alternative route: Gaseous ammonia or acetamide high-temperature dehydration method can also be used, but the mainstream in industry and laboratory is still direct ammonolysis of dianhydride. This compound cannot be directly synthesized from "tetracarbodiimide" (containing - CHO) (the name "tetracarbodiimide" is a misnomer, but it is actually "tetracarbodiimide"); Its precursor dianhydride is often prepared by oxidation of perylene (not naphthalene or anthracene), but the direct synthesis of 81-33-4 only requires one step of imidization.