Tetrachloro-[1,1']bipyrrolyl-2,5,2',5'-tetraone, also known as TCPO, is a chemical compound with the molecular formula C8H2Cl4N2O4. It is a yellow crystalline solid that is soluble in organic solvents. TCPO is primarily used as a photoinitiator in the polymerization of various monomers, particularly in the production of dental composites and adhesives. It works by absorbing light energy and generating free radicals, which then initiate the polymerization process. The compound is also known for its stability, low toxicity, and high efficiency in initiating polymerization reactions.

6903-91-9

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Basic information
1. Product Name: tetrachloro-[1,1']bipyrrolyl-2,5,2',5'-tetraone
2. Synonyms:
3. CAS NO:6903-91-9
4. Molecular Formula:
5. Molecular Weight: 329.911
6. EINECS: N/A
7. Product Categories: N/A
Chemical Properties
1. Melting Point: N/A
2. Boiling Point: N/A
3. Flash Point: N/A
4. Appearance: N/A
5. Density: N/A
6. Refractive Index: N/A
7. Storage Temp.: N/A
8. Solubility: N/A
9. CAS DataBase Reference: tetrachloro-[1,1']bipyrrolyl-2,5,2',5'-tetraone(CAS DataBase Reference)
10. NIST Chemistry Reference: tetrachloro-[1,1']bipyrrolyl-2,5,2',5'-tetraone(6903-91-9)
11. EPA Substance Registry System: tetrachloro-[1,1']bipyrrolyl-2,5,2',5'-tetraone(6903-91-9)
Safety Data
1. Hazard Codes: N/A
2. Statements: N/A
3. Safety Statements: N/A
4. WGK Germany:
5. RTECS:
6. HazardClass: N/A
7. PackingGroup: N/A
8. Hazardous Substances Data: 6903-91-9(Hazardous Substances Data)

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Check Digit Verification of cas no

The CAS Registry Mumber 6903-91-9 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 6,9,0 and 3 respectively; the second part has 2 digits, 9 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 6903-91:
(6*6)+(5*9)+(4*0)+(3*3)+(2*9)+(1*1)=109
109 % 10 = 9
So 6903-91-9 is a valid CAS Registry Number.

6903-91-9Upstream product

6903-91-9Downstream Products

139499-79-9 C₂₈H₁₄Cl₄N₂O₅

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