2-(p-Tolylazo)-4-brom-1-naphthol is an organic compound with the molecular formula C16H13BrN2O. It is characterized by the presence of a naphthalene ring, which is substituted with a bromine atom at the 4-position and a p-tolylazo group at the 2-position. The p-tolylazo group consists of a tolyl (a methyl-substituted phenyl) group attached to an azo group (-N=N-), which in turn is connected to the naphthalene ring. 2--4-brom-1-naphthol is often used as a reagent in chemical analysis, particularly in the determination of metal ions due to its ability to form colored complexes with certain metals. Its synthesis involves the reaction of 4-brom-1-naphthol with p-tolyldiazonium chloride, and it is typically employed in colorimetric methods to detect and quantify metal ions in various samples.

5813-13-8

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Basic information
1. Product Name: 2--4-brom-1-naphthol
2. Synonyms:
3. CAS NO:5813-13-8
4. Molecular Formula:
5. Molecular Weight: 341.207
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: 2--4-brom-1-naphthol(CAS DataBase Reference)
10. NIST Chemistry Reference: 2--4-brom-1-naphthol(5813-13-8)
11. EPA Substance Registry System: 2--4-brom-1-naphthol(5813-13-8)
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: 5813-13-8(Hazardous Substances Data)

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Check Digit Verification of cas no

The CAS Registry Mumber 5813-13-8 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 5,8,1 and 3 respectively; the second part has 2 digits, 1 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 5813-13:
(6*5)+(5*8)+(4*1)+(3*3)+(2*1)+(1*3)=88
88 % 10 = 8
So 5813-13-8 is a valid CAS Registry Number.

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