4,4'-Bis-(4-hydroxy-phenyliminomethyl)-biphenyl, also known as Bisphenol S, is an organic compound with the chemical formula C21H18O4. It is a white crystalline solid that is structurally similar to Bisphenol A, but with a sulfur atom replacing the central carbon bridge. Bisphenol S is primarily used in the production of polycarbonate plastics and epoxy resins, which are commonly found in food containers, water bottles, and dental sealants. It has gained attention due to its potential endocrine-disrupting properties and concerns over its environmental and health impacts, leading to its restriction or ban in certain applications in some countries.

3731-89-3

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Basic information
1. Product Name: 4,4'-Bis-(4-hydroxy-phenyliminomethyl)-biphenyl
2. Synonyms:
3. CAS NO:3731-89-3
4. Molecular Formula:
5. Molecular Weight: 392.457
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: 4,4'-Bis-(4-hydroxy-phenyliminomethyl)-biphenyl(CAS DataBase Reference)
10. NIST Chemistry Reference: 4,4'-Bis-(4-hydroxy-phenyliminomethyl)-biphenyl(3731-89-3)
11. EPA Substance Registry System: 4,4'-Bis-(4-hydroxy-phenyliminomethyl)-biphenyl(3731-89-3)
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: 3731-89-3(Hazardous Substances Data)

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Check Digit Verification of cas no

The CAS Registry Mumber 3731-89-3 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 3,7,3 and 1 respectively; the second part has 2 digits, 8 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 3731-89:
(6*3)+(5*7)+(4*3)+(3*1)+(2*8)+(1*9)=93
93 % 10 = 3
So 3731-89-3 is a valid CAS Registry Number.

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