2,2-Diphenyl-1-picrylhydrazyl
2,2-Diphenyl-1-picrylhydrazyl (CAS: 1898-66-4) is a stable free radical with the molecular formula C18H12N5O6 and a molecular weight of 394.32 g/mol. Known for its intense violet colour in solution, it is widely employed as a radical scavenger and a standard in electron paramagnetic resonance (EPR) spectroscopy. Its primary utility lies in research settings for studying reaction kinetics and antioxidant capacity.
- IUPAC
- 1,1-Diphenyl-2-picrylhydrazyl radical,2,2-Diphenyl-1-(2,4,6-trinitrophenyl)hydrazyl,DPPH
- Synonyms
- 1,1-Diphenyl-2-picrylhydrazyl radical2,2-Diphenyl-1-(2,4,6-trinitrophenyl)hydrazylDPPH
Antioxidant Studies
DPPH is extensively used to evaluate the antioxidant activity of various compounds, including natural products and synthetic molecules, by measuring their ability to scavenge free radicals.
EPR Spectroscopy Standard
As a stable radical, it serves as a standard reference material in Electron Paramagnetic Resonance (EPR) spectroscopy for calibration and characterisation of spectra.
Chemical Synthesis Reagent
Utilised in synthetic organic chemistry, particularly in studies involving radical reactions and mechanisms due to its well-defined radical nature.
Research and Development
Employed in academic and industrial laboratories for fundamental research in physical organic chemistry, materials science, and related fields.
| Molecular weight | 394.32 |
|---|---|
| Empirical formula | C18H12N5O6 |
| Assay | ≥85% (CHN) |
| Storage temperature | 2-8°C |
| Impurities tested | <10 ppm benzene |
| Melting point | ~135 °C (dec.)(lit.) |
Hazard statements
- H317May cause an allergic skin reaction
- H334May cause allergy or asthma symptoms if inhaled
Precautionary statements
- P261Avoid breathing dust, fume, gas or vapours
- P280Wear protective gloves, clothing and eye/face protection
- P342
| Water hazard class (WGK, DE) | 1 |
|---|---|
| Hazard codes (EU) | Xn |
| Risk statements (R) | 42/43 |
| Safety statements (S) | 22-36/37-45 |
| Ignition residue | ≤5% |
Hazard information is provided for guidance. Always consult the product Safety Data Sheet (SDS), available on request, before handling.
Documentation
Every batch ships with a Certificate of Analysis covering assay, identity and purity; the grade is confirmed against your enquiry. Safety Data Sheets and technical data sheets are available on request.
Supply & logistics
Samples for technical evaluation; bulk MOQ by grade and packaging. In-stock material ships in 7–10 working days, worldwide, with full export documentation.
What is 2,2-Diphenyl-1-picrylhydrazyl used for?
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2,2-Diphenyl-1-picrylhydrazyl (DPPH) is primarily used as a stable free radical for studying antioxidant activity, as a standard in Electron Paramagnetic Resonance (EPR) spectroscopy, and as a reagent in chemical synthesis research.
What is the CAS number and formula for 2,2-Diphenyl-1-picrylhydrazyl?
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The CAS number for 2,2-Diphenyl-1-picrylhydrazyl is 1898-66-4, and its empirical formula is C18H12N5O6.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies 2,2-Diphenyl-1-picrylhydrazyl with an assay of ≥85% (CHN). We do not represent this product as meeting USP, BP, or EP pharmacopoeia standards.
How should 2,2-Diphenyl-1-picrylhydrazyl be handled?
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Handle DPPH with appropriate personal protective equipment, including respiratory protection, as it may cause allergy or asthma symptoms or breathing difficulties if inhaled (H334) and may cause an allergic skin reaction (H317). Ensure good ventilation. Avoid breathing dust. Store at 2-8°C.
Is 2,2-Diphenyl-1-picrylhydrazyl shipped internationally?
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Yes, Tech Serve Solutions is a specialist global supplier and exporter of fine chemicals, including 2,2-Diphenyl-1-picrylhydrazyl.
How can I request a quote or sample for 2,2-Diphenyl-1-picrylhydrazyl?
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Please contact our sales team via the website or direct email to request a quote or sample for 2,2-Diphenyl-1-picrylhydrazyl.
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