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5-Br-PAPS 5-Br-PAPS, 2-(5-Bromo-2-pyridiylazo)-5-[N-n-propyl-N-(3-sulfopropyl)amino]phenol, disodium salt, dihydrate [CAS:91599-24-5]
Item #: B026 -

Product Description 5-Br-PAPS, a water-soluble derivative of 5-Br-PADAP, is a highly sensitive colorimetric reagent for zinc detection. This reagent forms a red chelate with zinc at pH 7.5-9.5 (λmax=552 nm, λ=13.3 x 104). 5-Br- PAPS is also utilized for the determination of Cu(II), Fe(II), Ni(II), Co(II), Pt(II), Ru(II), and Rh(II). 5-Br-PAPS is utilized to determine serum levels of Zn, Cu, Fe, Ni, and Co. For serum Zn levels, Fe ions can be masked with citric acid or metaphosphoric acid, and...

Chlorophosphonazo-III Chlorophosphonazo-III, 2,7-Bis(4-chloro-2-phosphonophenylazo)-1,8-dihydroxy-3,6- naphthalenedisulfonic acid, disodium salt [CAS: 1914-99-4]
Item #: C010 -

Product Description Chlorophosphonazo-III is a colorimetric reagent for thorium, uranium, lanthanoids, actinoids, and alkaline earth metals. This reagent is readily soluble in water and is violet at pH 4 or lower, blue in NaOH solution, and brilliant green in acids such as H2SO4, HCl and diluted HNO3 (it decomposes in concentrated HNO3). Its proton dissociation constants are reported to be -1.1, -1.1, 0.6, 0.8, 1.5, 2.5, 5.47, 7.20, 12.15 and 15.13 (μ=0.1, 20ºC). Chlorophosphonazo-III is used...

Nitro-PAPS Nitro-PAPS, 2-(5-Nitro-2-pyridylazo)-5-[N-n-propyl-N-(3-sulfopropyl)amino]phenol, disodium salt, dihydrate [CAS: 143205-66-7]
Item #: N031 -

Product Description Nitro-PAPS is a highly sensitive colorimetric reagent for Fe(II) detection that forms a water-soluble complex at pH 3.0-8.0 (λmax=582 nm, λ=107,000). This reagent is suitable for the determination of Fe(II) in serum and can also be used to determine micromolar levels of Cu, Zn, Ni, and Co. Cu and Zn in serum are masked by a mixture of thioglycolic acid and SDS. Zn in serum can be determined by Nitro-PAPS using CN- as a masking reagent of Fe and Cu. Chemical Structure ...

Nitroso-PSAP Nitroso-PSAP, 2-Nitroso-5-[N-n-propyl-N-(3-sulfopropyl)amino]phenol [CAS 80459-15-0]
Item #: N010 -

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=4.5x104 ). 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...

PR PR, Pyrogallol Red [CAS: 32638-88-3]
Item #: P012 -

Product Description PR is a colorimetric reagent and indicator for heavy metal ions and rare earth metals. This reagent is hardly soluble in water and alcohol, and insoluble in organic solvents. The color of PR in aqueous solution is orange-red in weak acidic pH, yellow in neutral pH, and violet in alkaline pH. The aqueous PR solution turns red in the presence of Bi or Pb at acidic pH, and blue-violet in the presence of Co, Ni, and rare earth metal ions at neutral or alkaline pH. Its proton...

XB-I XB-I, 3-[3-(2,4-Dimethylphenylcarbamoyl)-2-hydroxynaphthalen-1-yl-azo]-4-hydroxybenzenesulfonic acid, sodium salt [CAS: 14936-97-1]
Item #: X001 -

Product Description XB-I is a colorimetric reagent for Mg detection. It is slightly soluble in water and alcohol, and readily soluble in aqueous alkaline solution. The aqueous solution of XB-1 is red, and turns reddish-violet in the presence of Mg at pH 9 (maximum wavelength: 510 nm, molar absorptivity: 49,000, detection range 0.02-0.4 ppm). Product Description ...