Trimethyl-bis-<α.α-dimethyl-benzyl-peroxy>-arsen, also known as TMBPA, is a complex organoarsenic compound with the chemical formula C21H27AsO4. It is a white crystalline solid that is widely used as a chain transfer agent in the production of polyvinyl chloride (PVC) and other polymers. TMBPA functions by controlling the molecular weight of the polymer chains, which is crucial for achieving desired properties in the final product. The compound is characterized by its two α,α-dimethyl-benzyl-peroxy groups attached to an arsenic center, which are responsible for its reactivity and utility in polymer chemistry. It is also known for its thermal stability and resistance to degradation, making it a valuable additive in the plastics industry.

4008-93-9

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Basic information
1. Product Name: Trimethyl-bis-<α.α-dimethyl-benzyl-peroxy>-arsen
2. Synonyms:
3. CAS NO:4008-93-9
4. Molecular Formula:
5. Molecular Weight: 422.396
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: Trimethyl-bis-<α.α-dimethyl-benzyl-peroxy>-arsen(CAS DataBase Reference)
10. NIST Chemistry Reference: Trimethyl-bis-<α.α-dimethyl-benzyl-peroxy>-arsen(4008-93-9)
11. EPA Substance Registry System: Trimethyl-bis-<α.α-dimethyl-benzyl-peroxy>-arsen(4008-93-9)
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: 4008-93-9(Hazardous Substances Data)

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Check Digit Verification of cas no

The CAS Registry Mumber 4008-93-9 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 4,0,0 and 8 respectively; the second part has 2 digits, 9 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 4008-93:
(6*4)+(5*0)+(4*0)+(3*8)+(2*9)+(1*3)=69
69 % 10 = 9
So 4008-93-9 is a valid CAS Registry Number.

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