α-Methylfluoren-9-essigsaeure, also known as 9-(α-methylacrylic)fluorene-9-carboxylic acid, is a chemical compound with the molecular formula C18H14O2. It is a derivative of fluorene, a polycyclic aromatic hydrocarbon, and features a methyl group attached to the fluorene core and an acrylic acid functional group. α-Methylfluoren-9-essigsaeure is of interest in organic chemistry and materials science, particularly for its potential applications in the synthesis of advanced polymers and other complex organic molecules. Its unique structure allows for various chemical reactions and modifications, making it a valuable building block in the development of new materials with specific properties.

21720-57-0

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Basic information
1. Product Name: α-Methylfluoren-9-essigsaeure
2. Synonyms:
3. CAS NO:21720-57-0
4. Molecular Formula:
5. Molecular Weight: 238.286
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: α-Methylfluoren-9-essigsaeure(CAS DataBase Reference)
10. NIST Chemistry Reference: α-Methylfluoren-9-essigsaeure(21720-57-0)
11. EPA Substance Registry System: α-Methylfluoren-9-essigsaeure(21720-57-0)
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: 21720-57-0(Hazardous Substances Data)

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Check Digit Verification of cas no

The CAS Registry Mumber 21720-57-0 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,1,7,2 and 0 respectively; the second part has 2 digits, 5 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 21720-57:
(7*2)+(6*1)+(5*7)+(4*2)+(3*0)+(2*5)+(1*7)=80
80 % 10 = 0
So 21720-57-0 is a valid CAS Registry Number.

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