chromotropic acid


Also found in: Medical, Wikipedia.

chromotropic acid

[¦krō·mə¦träp·ik ′as·əd]
(organic chemistry)
C10H8O8S2 White, needlelike crystals that are soluble in water; used as an analytical reagent and azo dye intermediate.
Mentioned in ?
References in periodicals archive ?
The FA concentration in the gaseous phase was measured with the formaldehyde gas detector (Model FP-40 Riken Keiki, Japan) and in the liquid phase by a standard photometric method using a reaction with 1% chromotropic acid [16].
Stock solution of HCT containing 200 [micro]g/ml was prepared in ethyl acetate for the chromotropic acid (CTA) method.
Chromotropic acid (CTA) method was a colorimetric method used for the selective determination of HCT (minor component) in a combination containing IRB as a major component.
Spectrophotometric determination of nitrate using chromotropic acid. Anal.
Pour 0,5 ml of chromotropic acid and 2 ml concentrated [H.sub.2]S[O.sub.4] to every test-tube.
Immediately upon completion of the RF heating process, three sets of shavings obtained from the treated part of each pole section were placed in a glass dish in a fume hood and sprayed with chromotropic acid solution.
Chromotropic acid. -- 2.0 g of 4,5-di-hydroxynaphthalene-2, 7-disulfonic acid was dissolved in 400 mL of 0.5 M sulfuric acid.
None of the samples showed any reaction with chromotropic acid, indicating that there was no detectable hexavalent chromium ([less than] 15 ppm of Cr(VI)) (13,14).
Comparing the chromotropic acid data with the spectrophotometer analysis, some discrepancies can be seen in Tables 2 through 4.
The chips recovered from the pole sections were also tested using chromotropic acid at different time intervals (Table 6).