Benzoic acid, 4-[(2,4,6-trinitrophenyl)amino]-, also known as Trinitrobenzenesulfonic acid or TNBS, is a chemical compound with the molecular formula C13H8N4O7S. It is a yellow crystalline solid that is soluble in water and organic solvents. TNBS is commonly used as a reagent in various analytical techniques, particularly for the quantification of primary amines and amino groups. It reacts with amines to form a yellow-colored product, which can be measured spectrophotometrically. This property makes it a valuable tool in the determination of protein concentration, enzyme activity, and other applications in biochemistry and molecular biology. Additionally, TNBS has been used in the synthesis of dyes and as a chemical warfare agent. Due to its potential hazards, it is important to handle TNBS with care and in accordance with safety regulations.
7221-18-3
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Basic information
- Product Name: Benzoic acid, 4-[(2,4,6-trinitrophenyl)amino]-
- Synonyms:
- CAS NO:7221-18-3
- Molecular Formula: C13H8N4O8
- Molecular Weight: 348.229
- 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: Benzoic acid, 4-[(2,4,6-trinitrophenyl)amino]-(CAS DataBase Reference)
- NIST Chemistry Reference: Benzoic acid, 4-[(2,4,6-trinitrophenyl)amino]-(7221-18-3)
- EPA Substance Registry System: Benzoic acid, 4-[(2,4,6-trinitrophenyl)amino]-(7221-18-3)
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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: 7221-18-3(Hazardous Substances Data)
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Check Digit Verification of cas no
The CAS Registry Mumber 7221-18-3 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 8 respectively.Calculate Digit Verification of CAS Registry Number 7221-18:
(6*7)+(5*2)+(4*2)+(3*1)+(2*1)+(1*8)=73
73 % 10 = 3
So 7221-18-3 is a valid CAS Registry Number.
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Benzoic acid, 4-[(2,4,6-trinitrophenyl)amino]-
