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Detail of "32638-88-3"

  • MSDS Download
  • CAS Number:
  • 32638-88-3
  • Name:

  • Pyrogallol sulfonphthalein

  • Molecular Structure:
  • Formula:
  • C19H12O8S
  • Molecular Weight:
  • 400.3588
  • Deleted CAS:
  • 116239-00-0|3172-49-4
  • Synonyms:
  • Pyrogallol red;3172-49-4;Pyrogallolsulfonephthalein;Spiro[3H-2,1-benzoxathiole-3,9'-[9H]xanthene]- 3',4',5',6'-tetrol,1,1-dioxide;yl)-;2-(4,5,6-trihydroxy-3-oxo-xanthen-9-yl)benzenesulfonate;Benzenesulfonic acid, 2-(4,5,6-trihydroxy-3-oxo-3H-xanthen-9-yl)-;Spiro(3H-2,1-benzoxathiole-3,9-(9H)xanthene)-3,4,5,6-tetrol, 1,1-dioxide;
  • EINECS:
  • 251-134-3
  • Density:
  • 1.082 g/mL at 20 °C
  • Melting Point:
  • 133-134 °C(lit.)
  • Boiling Point:
  • 686.1 °C at 760 mmHg
  • Flash Point:
  • 368.8 °C
  • Appearance:
  • dark brown powder
  • Hazard Symbols:
  • HarmfulXn
  • Risk Codes:
  • 20/21/22-52/53-68
  • Safety:
  • 36/37-61 Details
  • Transport Information:
  • UN 2811 6.1/PG 3
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Molecular Formula: C19H12O8S Formula Weight: 400.36

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Reference

Determination of vitamin B12 as cobalt by use of catalytic-spectrophotometric method
Determination of vitamin B12 as cobalt by use of catalytic-spectrophotometric method. Medina-Escriche, J.; Hernandez-Llorens, M.Several substances are used for example 7440-48-4 and 68-19-9 which are their cas registry numbers. L.; Llobat-Estelles, M.; Sevillano-Cabeza, A. (Fac. Chem. Sci., Valencia Univ., Burjasot, Spain). Analyst (London), 112(3), 309-11 (English) 1987. CODEN: ANALAO. ISSN: 0003-2654. DOCUMENT TYPE: Journal CA Section: 64 (Pharmaceutical Analysis) A kinetic-spectrophotometric method is proposed for the detn. of vitamin B12 [68-19-9] as Co in pharmaceutical prepns. After digestion of the sample with concd. H2SO4, Co in the range 0.20-13.00 ng mL-1 can be detd. catalytically by addn. of a MeOH soln. of pyrogallol red [32638-88-3] and H2O2. The results are compared with those for the detn. of Co by flame and graphite furnace at. absorption spectrometry. .
Spectrophotometric determination of microamounts of tungsten in steel with pyrogallol red-cetyltrimethylammonium bromide-OP emulsifier
Spectrophotometric determination of microamounts of tungsten in steel with pyrogallol red-cetyltrimethylammonium bromide-OP emulsifier. Zheng, Siyun (Peop. Rep. China). Fenxi Huaxue, 11(9), 684-6 (Chinese) 1983. CODEN: FHHHDT. ISSN: 0253-3820. DOCUMENT TYPE: Journal CA Section: 79 (Inorganic Analytical Chemistry) Microamts. of W were detd. 57-09-0 and 32638-88-3 which are cas registry numbers are also used here. by spectrophotometry by its reaction with pyrogallol red and cetyltrimethylammonium bromide at pH 5.0 in the presence of OP emulsifier. The absorbance was measured at 580 mm (molar absorptivity = 5 ′ 104). Beer's law was obeyed for 0-74 mg W /50 mL. In the presence of hydroxylamine hydrochloride, cyclohexanediaminetetraacetic acid, and NH4F, Mo(VI), V(V), and Ti do not interfere. The method was applied to det. microamts. of W in steel. .
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