N-Picryl-sulfanilic acid, also known as 2-(4-nitrophenylazo)benzenesulfonic acid, is an organic compound with the chemical formula C12H9N4O5S. It is a yellow crystalline solid that is soluble in water and ethanol. N-picryl-sulfanilic acid is primarily used as a reagent in analytical chemistry for the detection and determination of various metal ions, particularly copper(II) ions, through a colorimetric method. The reaction with copper(II) ions results in a distinct color change, which can be used to quantify the amount of copper present in a sample. N-Picryl-sulfanilic acid is also used in the synthesis of other azo dyes and as a pH indicator. Due to its potential health and environmental hazards, it is important to handle this chemical with care and in accordance with safety regulations.
7221-17-2
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Basic information
- Product Name: N-picryl-sulfanilic acid
- Synonyms:
- CAS NO:7221-17-2
- Molecular Formula:
- Molecular Weight: 384.283
- EINECS: N/A
- Product Categories: N/A
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Chemical Properties
- Melting Point: N/A
- Boiling Point: N/A
- Flash Point: N/A
- Appearance: N/A
- Density: N/A
- Refractive Index: N/A
- Storage Temp.: N/A
- Solubility: N/A
- CAS DataBase Reference: N-picryl-sulfanilic acid(CAS DataBase Reference)
- NIST Chemistry Reference: N-picryl-sulfanilic acid(7221-17-2)
- EPA Substance Registry System: N-picryl-sulfanilic acid(7221-17-2)
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Safety Data
- Hazard Codes: N/A
- Statements: N/A
- Safety Statements: N/A
- WGK Germany:
- RTECS:
- HazardClass: N/A
- PackingGroup: N/A
- Hazardous Substances Data: 7221-17-2(Hazardous Substances Data)
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Check Digit Verification of cas no
The CAS Registry Mumber 7221-17-2 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 7,2,2 and 1 respectively; the second part has 2 digits, 1 and 7 respectively.Calculate Digit Verification of CAS Registry Number 7221-17:
(6*7)+(5*2)+(4*2)+(3*1)+(2*1)+(1*7)=72
72 % 10 = 2
So 7221-17-2 is a valid CAS Registry Number.
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N-picryl-sulfanilic acid
