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CRESOL RED [1 record]

Record 1 2011-03-18

English

Subject field(s)
  • Chemical Elements and Compounds
  • Analytical Chemistry
  • Environmental Studies and Analyses
Universal entry(ies)
C21H18O5S
formula, see observation
C6H4SO2OC(C6H3(OH)CH3)2
formula, see observation
DEF

A dye ... of the sulfonephthalein series derived from ortho-cresol that is obtained as a reddish brown crystalline powder and is used as an acid-base indicator.

OBS

"cresol red" changes from yellow to red between pH 7.0 and 8.8.

OBS

4,4'-(3H-2,1-benzoxathiole-3,3-diyl)bis(2-methylphenol) 1,1-dioxide: The capital letter "H" must be italicized.

OBS

Chemical formula: C21H18O5S or C6H4SO2OC(C6H3(OH)CH3)2

OBS

The prefix "ortho" and its abbreviated form "o" appear in italics and are ignored in alphabetizing.

French

Domaine(s)
  • Éléments et composés chimiques
  • Chimie analytique
  • Études et analyses environnementales
Entrée(s) universelle(s)
C21H18O5S
formula, see observation
C6H4SO2OC(C6H3(OH)CH3)2
formula, see observation
DEF

Sulfone-phtaléine de l'o-crésol [...]; indicateur de pH (7,2-8,8, jaune à violet-rouge) et 0,2 à 1,8 (du rouge au jaune).

OBS

1,1-dioxyde de 4,4'-(3H-2,1-benzoxathiole-3,3-diyl)bis(2-methylphenol) : La lettre majuscule «H» s'écrit en italique.

OBS

Formule chimique : C21H18O5S ou C6H4SO2OC(C6H3(OH)CH3)2

Spanish

Campo(s) temático(s)
  • Elementos y compuestos químicos
  • Química analítica
  • Estudios y análisis del medio ambiente
Entrada(s) universal(es)
C21H18O5S
formula, see observation
C6H4SO2OC(C6H3(OH)CH3)2
formula, see observation
OBS

Fórmula química: C21H18O5S o C6H4SO2OC(C6H3(OH)CH3)2

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