o-Phenylen-bis-phenylphosphins?ure, also known as o-phenylene bis(phenylphosphonic acid), is an organic compound with the chemical formula C18H14O4P2. It is a white crystalline solid that is soluble in water and organic solvents. o-Phenylen-bis- is characterized by a central o-phenylene ring (a benzene ring with two adjacent hydrogen atoms replaced by a single bond), with two phenylphosphonic acid groups attached to it. The phenylphosphonic acid groups consist of a benzene ring attached to a phosphonic acid group (a phosphorus atom bonded to three oxygen atoms and one hydroxyl group). o-Phenylene bis(phenylphosphonic acid) is used as a chelating agent, particularly in the purification of water and the treatment of metal ions, due to its ability to form stable complexes with various metal ions. It is also employed as a flame retardant and a stabilizer in various industrial applications.

5994-56-9

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Basic information
1. Product Name: o-Phenylen-bis-
2. Synonyms:
3. CAS NO:5994-56-9
4. Molecular Formula:
5. Molecular Weight: 358.27
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: o-Phenylen-bis-(CAS DataBase Reference)
10. NIST Chemistry Reference: o-Phenylen-bis-(5994-56-9)
11. EPA Substance Registry System: o-Phenylen-bis-(5994-56-9)
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: 5994-56-9(Hazardous Substances Data)

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Check Digit Verification of cas no

The CAS Registry Mumber 5994-56-9 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 5,9,9 and 4 respectively; the second part has 2 digits, 5 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 5994-56:
(6*5)+(5*9)+(4*9)+(3*4)+(2*5)+(1*6)=139
139 % 10 = 9
So 5994-56-9 is a valid CAS Registry Number.

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