15 Chromogen/Metal Indicator



Metal Indicator

  • Product code
    A012  Arsemate
  • CAS No.
  • Chemical name
    DiethyldithiOcarbamic acid, silver salt
  • MW
Unit size Price Item Code
5 g $65.00 A012-10
25 g $219.00 A012-12

Quantity may be adjusted within the cart.

Chemical Structure

Product Description

Arsemate is soluble in pyridine and chloroform, but insoluble in water and other organic solvents. For arsenic detection, a 0.5% Arsemate/pyridine solution is used. The sample should be treated with sulfuric acid, 15% potassium iodide, and 40% SnCl2/HCl solution to convert arsenic to AsH3. Arsemate reacts with AsH3 in pyridine and forms red colloidal silver with a maximum wavelength at 520-540 nm. The detection range of arsenic using the Arsemate/pyridine solution is 4-12 ppm. Alternatively, 0.5% Arsemate/chloroform solution with 30 mM triethylamine can be used for the assay. For the colorimetric detection of arsenic, the AsH3 gas generator is required.


Open References

1. A. G. Howard and H. Arbab-Zavar, "Sequential Spectrophotometric Determination of Inorganic Arsenic(III) and Arcenic(V) Species", Analyst, 1980, 105, 33.

Handling and storage condition

Appearance: Slightly yellowish white to yellow powder or crystalline powder
Purity (Titration): ≧ 98.0 %
Solubility in Pyridine: To pass test (clear, yellow)
Solubility in Chloroform: To pass test (clear, yellow)
Sensitivity (As): To pass test
IR spectrum: Authentic
Handling and storage condition
Ambient temperature, Protect from light

Product Classification

Product Classification

Search word