Product Description
3-(2-Pyridyl)-5,6-Diphenyl-1,2,4-Triazine (PDT or PDPDT) is a pale yellow crystalline compound widely recognized for its role as a colorimetric and spectrophotometric reagent. It forms stable colored complexes with transition metals—particularly iron(II)—making it invaluable in analytical chemistry for metal ion determination.
This compound is used in laboratories for quantitative analysis, complexometric titrations, and trace metal detection, especially in water, environmental, and biochemical testing.

Key Features
- Chemical Name: 3-(2-Pyridyl)-5,6-Diphenyl-1,2,4-Triazine
• Chemical Formula: C₁₉H₁₄N₄
• CAS Number: 3682-35-7
• Molecular Weight: 298.34 g/mol
• Appearance: Pale yellow crystalline powder
• Odor: Odorless
• Melting Point: 241–244 °C
• Solubility: Soluble in organic solvents (ethanol, acetone, chloroform); slightly soluble in water
• Purity: ≥99% (Analytical / Reagent Grade)
• pH (1% Solution): Neutral to slightly basic
• Stability: Stable under normal laboratory conditions
Applications
- Analytical Chemistry
- Used as a spectrophotometric reagent for iron(II) determination by forming a stable red-colored complex.
- Applicable for colorimetric estimation of metal ions like copper, cobalt, nickel, and zinc.
- Employed in complexometric titrations and trace metal detection in water, soil, and food samples.
- Laboratory & Research Use
- Commonly used in environmental analysis, biochemical assays, and analytical quality control.
- Valuable in developing colorimetric sensors and chemical indicators.
- Educational Applications
- Utilized in teaching laboratories to demonstrate metal-ligand complexation and colorimetric analysis techniques.
Safety & Handling
- Hazard: May cause irritation to eyes, skin, and respiratory tract. Harmful if swallowed.
• Precautions: Handle with care using gloves, goggles, and protective clothing. Work in a well-ventilated area or fume hood. Avoid inhalation of dust or contact with skin.
• Storage: Store in a tightly closed container, in a cool, dry, and dark place. Keep away from strong oxidizing or reducing agents.
• Emergency: In case of contact, wash thoroughly with water and seek medical advice if necessary.
Why Choose 3-(2-Pyridyl)-5,6-Diphenyl-1,2,4-Triazine?
- High-purity reagent ideal for precise spectrophotometric analysis.
• Reliable and sensitive colorimetric reagent for metal ion detection.
• Stable and consistent performance for analytical and research applications.
• Professionally tested and securely packaged for long shelf life.
Price in Bangladesh
Available in analytical-grade packaging (1 g, 5 g, 10 g, 25 g) at competitive prices.
Bulk and institutional discounts available for research, educational, and industrial sectors.
Where to Buy
3-(2-Pyridyl)-5,6-Diphenyl-1,2,4-Triazine is available through authorized laboratory reagent suppliers and distributors across Bangladesh.
Why Buy from M/S Bright Scientific Co.?
- Trusted Supplier: Serving research institutions, universities, and analytical laboratories.
• Assured Quality: Verified for analytical and spectrophotometric-grade applications.
• Competitive Pricing: Affordable options for both small and bulk orders.
• Prompt Delivery: Safe, secure, and nationwide delivery network.
Contact Information
M/S Bright Scientific Co.
📞 Phone: 01711285976





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