4,4'-Bis(diethylamino) benzophenone CAS 90-93-7

Product Name: 4,4'-Bis(diethylamino)benzophenone
English Alias: Ethyl Michler's Ketone; EMK; 4,4'-Bis(diethylamino)benzophenone
CAS Number: 90-93-7
Molecular Formula: C₂₁H₂₈N₂O
Molecular Weight: 324.46 g/mol
Appearance: Greenish-yellow crystalline powder
Package: 1 kg/bag, 5 kg/bag (double sealed aluminum bags with desiccant)

What is 4,4'-Bis(diethylamino)benzophenone？

4,4'-Bis(diethylamino)benzophenone (Ethyl Michler's Ketone) is an aromatic ketone derivative appearing as a greenish-yellow crystalline powder. It is soluble in organic solvents such as ethanol, acetone, and benzene, but insoluble in water. The compound is a key intermediate in the production of dyes and pigments, and exhibits unique photochemical properties. It should be protected from light during storage.

COA (Certificate of Analysis):

Item	Specifications	Results
Appearance	White or light yellow powder	Confirms
Purity , %	≥99.0	99.24
Melting point range , ℃	93.0~96.0	94.9
Moisture , %	≤0.3	0.11
Residue on ignition , %	≤0.05	Confirms

Application:

1. Dye Intermediate: Key intermediate for triarylmethane dyes and pigments

2. Photoreaction Initiator: Photoinitiator in UV-curable inks and coatings

3. Chemical Synthesis: Building block for functional materials and organic electronics

4. Research Reagent: Probe molecule in photochemistry studies

5. Sensitizer: Photosensitizer in photodynamic therapy research

6. Analytical Chemistry: Chromogenic reagent for detection of certain metal ions

Safety Profile:

4,4'-Bis(diethylamino)benzophenone may be harmful if swallowed or inhaled. Causes skin and eye irritation. Suspected of causing genetic defects. Use appropriate personal protective equipment including gloves, safety glasses, and adequate ventilation when handling. Avoid contact with skin and eyes. The substance is toxic to aquatic life. For comprehensive safety information, always consult the full Safety Data Sheet (SDS).

Storage Requirements:

Store in a cool, dry, well-ventilated area away from direct sunlight. Keep containers tightly sealed and protected from light. Maintain storage temperature between 2-8°C. Relative humidity below 40% recommended. Handle under inert atmosphere when opening containers.

Transport & Packaging:

4,4'-Bis(diethylamino)benzophenone is packaged in double-sealed light-proof aluminum bags with desiccant (1 kg or 5 kg net weight per bag), placed in sturdy outer containers. Transport as hazardous material according to applicable regulations. Ensure containers are properly sealed and protected from light during transportation. Store away from incompatible materials.