15 Chromogen/Metal Indicator



Metal Indicator

  • Product code
    N010  Nitroso-PSAP
  • CAS No.
  • Chemical name
  • MW
Unit size Price Item Code
100 mg $43.00 N010-10
1 g $196.00 N010-12
Quantity may be adjusted within the cart.

Product Description

Nitroso-PSAP is a highly sensitive water-soluble colorimetric reagent for Fe(II) detection that forms a green complex with Fe(II) (λmax=756 nm, ε=4.5×104 ). This reagent is suitable for the determination of blood serum levels of Fe, Co, Ni, and Cu. The detection range is from 5 ppb to 5 ppm under the same detection condition. Nitroso-PSAP is useful in flow injection analyses. The workable pH range of the nitroso compounds is 5.6-10.1. The molar absorptivities and maximum wavelengths of the Co, Cu, and Ni complexes are 4.0×104 (490 nm), 2.8×104 (429 nm), and 2.6×104 (394 nm), respectively.


Chemical Structure


Technical info

Table 1 Spectral Data of Nitroso-PSAP-Metal Complex


Open References

1) K. Toei, S. Motomizu and T. Korenaga, "Nitrosophenol and Nitrosonaphthol Derivatives as Reagents for the Spectrophotometric Determination of Iron and Determination of Micro-amounts in Waters with 2-Nitroso-5-dimethylaminophenol", Analyst, 1975, 100, 629. 
2) N. Ohno and T. Sakai, "Spectrophotometric Determination of Iron in Boiler and Well Waters by Flow Injection Analysis Using 2-Nitroso-5-(N-propyl-N-sulphopropylamino)phenol", Analyst, 1987, 112, 1127. 
3) I. Yoshida, F. Sagara and K. Ueno, "Studies of the Stabilities of Scandium, Yttrium, and Lanthanoid-ion Complexes of 2-Nitroso-5-(N-propyl-3-sulfopropylamino)phenol", Bull. Chem. Soc. Jpn., 1988, 61, 2639. 
4) I. Yoshida, F. Sagara and K. Ueno, "Potentiometric Studies on the Binding Properties of Protons, Some Divalent and Tervalent Metal Ions with 2-Nitroso-5-(N-propyl-3-sulfopropylamino)phenol", Anal. Sci., 1988, 4, 69. 
5) T. Makino, K. Nakamura and K. takahara, "A high-performance liquid immunoaffinity chromatography method for determining transferrin-bound iron in serum", Clinica Chimica Acta, 2011, 412, 914.

Handling and storage condition

Appearance: Yellow to yellowish brown powder
Purity (Absorbance): ≧ 97.0 %
Solubility in water: To pass test (clear, reddish orange)
Absorbance(blank): ≦ 0.050 (around 756 nm)
Molar absorptivity (Iron Complex): ≧ 44,000 (around 756 nm)
IR spectrum: Authentic
Handling and storage condition

Product Classification

Product Classification

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