2,2'-(1,2-Ethenediyl)bis[5-[(2,3,4-trihydroxyphenyl)azo]benzenesulfonic acid] is a complex organic compound with the chemical formula C26H22N4O10S2. It is a type of azo dye, characterized by the presence of azo groups (-N=N-) and a sulfonic acid group. 2,2'-(1,2-Ethenediyl)bis[5-[(2,3,4-trihydroxyphenyl)azo]benzenesulfonic acid] is derived from the condensation of two 5-[(2,3,4-trihydroxyphenyl)azo]benzenesulfonic acid molecules with an ethylene (1,2-ethenediyl) bridge. It is known for its ability to form colored complexes with metal ions, which makes it useful in analytical chemistry for the detection and quantification of certain metals. The compound's structure allows it to chelate with metal ions, changing its color in the process, which can be utilized for colorimetric analysis.

3937-33-5

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Basic information
1. Product Name: 2,2'-(1,2-Ethenediyl)bis[5-[(2,3,4-trihydroxyphenyl)azo]benzenesulfonic acid]
2. Synonyms: 2,2'-(1,2-Ethenediyl)bis[5-[(2,3,4-trihydroxyphenyl)azo]benzenesulfonic acid];4,4'-Bis[(2,3,4-trihydroxyphenyl)azo]-2,2'-stilbenedisulfonic acid;Stilbazogall I
3. CAS NO:3937-33-5
4. Molecular Formula: C26H20N4O12S2
5. Molecular Weight: 644.59
6. EINECS: N/A
7. Product Categories: N/A
8. Mol File: 3937-33-5.mol
Chemical Properties
1. Melting Point: N/A
2. Boiling Point: N/A
3. Flash Point: N/A
4. Appearance: /
5. Density: N/A
6. Refractive Index: N/A
7. Storage Temp.: N/A
8. Solubility: N/A
9. CAS DataBase Reference: 2,2'-(1,2-Ethenediyl)bis[5-[(2,3,4-trihydroxyphenyl)azo]benzenesulfonic acid](CAS DataBase Reference)
10. NIST Chemistry Reference: 2,2'-(1,2-Ethenediyl)bis[5-[(2,3,4-trihydroxyphenyl)azo]benzenesulfonic acid](3937-33-5)
11. EPA Substance Registry System: 2,2'-(1,2-Ethenediyl)bis[5-[(2,3,4-trihydroxyphenyl)azo]benzenesulfonic acid](3937-33-5)
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: 3937-33-5(Hazardous Substances Data)

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Check Digit Verification of cas no

The CAS Registry Mumber 3937-33-5 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 3,9,3 and 7 respectively; the second part has 2 digits, 3 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 3937-33:
(6*3)+(5*9)+(4*3)+(3*7)+(2*3)+(1*3)=105
105 % 10 = 5
So 3937-33-5 is a valid CAS Registry Number.

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