15 Chromogen/Metal Indicator



Metal Indicator

  • Product code
    D008  Diantipyrylmethane
  • CAS No.
  • Chemical name
    Di(4-antipyryl)methane, monohydrate
  • MW
Unit size Price Item Code
25 g D008-10

Product Description

Diantipyrylmethane is a colorimetric reagent for Ti detection, and is also used as a gravimetric and solvent extraction reagent for various kinds of metal ions. This reagent is readily soluble in mineral acids and organic solvents, and slightly soluble in benzene (1.7%) and carbon tetrachloride (0.28%). Diantipyrylmethane forms a yellow complex with Ti in 0.5-4.0 M HCl solution (λmax=385-390 nm, ε=15,000). The resulting Ti complex can be extracted by organic solvents in the presence of I-, SCN-, tartaric acid, or pyrocatechol. The detection range is 0.2-3.0 ppm. Diantipyrylmethane also makes a brown water-soluble complex with Fe in a weak acidic solution.

Chemical Structure

Technical info

Solvent extraction, colorimetric detection: Fe (λmax=450 nm, ε=5,400), Mo, Ti, U
Gravimetric detection: Be, Ca, Cd, Co, Cu, Hg, Ir, Os, Pb, Sr, Tl, Zn


Open References

1. C. H. Chung, Simultaneous Determination of Iron and Titanium in Silicate Rocks by Using Diantipyrinylmethane with Dual-wavelength Spectrophotometry. Anal Chim Acta. 1983;154:259-265.
2. N. Uehara, et al., Determination of Titanium(III) in River Water by Ion-pair Reversed-phase High-performance Liquid Chromatography with 4,4 EDiantipyrylmethane. Analyst. 1991;116:27-29.

Handling and storage condition

Appearance: White crystalline powder
Purity (HPLC): ≧ 99.0 %
Solubility in Dilute hydrochloric acid: To pass test (clear, colorless or pale yellow)
m.p.: 148 - 159°C
Absorbance (Titanium complex): ≧ 0.280 (around 390 nm)
Water content: 2.0 - 5.0 %
IR spectrum: Authentic
Handling and storage condition
Ambient temperature

Product Classification

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