Application: Fe(II) detection, colorimetric

ChemicalName: 2-Nitroso-5-[N-n-propyl-N-(3-sulfopropyl)amino]phenol
CAS: 80459-15-0

Appearance: Yellow or yellowish brown powder
Purity: ≥97.0% (Absorbance)
Molar absorptivity (Fe2+ complex): ≥44,000 (around 756 nm)
Absorbance (Fe2+ free, Blank): ≤0.050 (around 756 nm)
MW: 302.35 C12H18N2O5S

Storage Condition: 0-5ºC, protect from metal
Shipping Condition: ambient temperature


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

1. K. Toei, et al., 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;100:629-636.
2. N. Ohno, et al., Spectrophotometric Determination of Iron in Boiler and Well Waters by Flow Injection Analysis Using 2-Nitroso-5-(N-propyl-N-sulphopropylamino) phenol. Analyst. 1987;112:1127-1130.
3. I. Yoshida, et al., 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;61:2639-2640.
4. I. Yoshida, et al., 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;4:69-72.

Table 1 Spectral Data of Nitroso-PSAP-Metal Complex

Related Categories
Ion Analysis Reagents

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