Cresol Red, Sodium Salt

Other Names Phenol, 4,4 -(3H-2,l-benzoxathiol-3-ylidene)fci5 [2-methyl-, 5,5-dioxide, monosodium salt 3H-2,l-Benzoxathiole, phenol derivative CA Index Name Phenol, 4,4 -(l,l-dioxido-3H-2,l-benzoxathiol-3-yhdene)fci5 [2-methyl-, monosodium salt 

CAS Registry Number 62625-29-0 Merck Index Number Not hsted Chemical Structure 

Chemical/Dye Class Snlfonephthalein Molecular Formula C2iHi705SNa Molecular Weight 404.42 pH Range 0.2-1.8 7.0-8.8 

Yellow (7.0) to reddish-purple (8.8) pKa 1.4, 8.2, 8.3 Physical Form Brown powder Solubility Soluble in water, ethanol UV-Visible (Xmax) 425 nm Melting Point 250°C (decompose) 

Major Applications Thermochromic materials, cosmetics, measurement of hydrophobicity of therapeutic drugs  

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Alizarin Alizarin Red S Alizarin Yellow R Benzopurpurine 4B 4,4 -Bis(2-amino-l-naphthylazo)-2,2 -stilbenedisulfonic acid 4,4 -Bis(4-amino-l-naphthylazo)-2,2 -stilbenedisulfonic acid Brilliant Yellow Bromocresol Green Bromocresol Purple Bromophenol Blue Bromothymol Blue Chlorophenol Red Clayton Yellow Congo Red o-Cresolphthalein Cresol Red Crystal Violet Curcumin (Turmaric) p-(2,4-Dihydroxyphenylazo) benzenesulfonic acid, sodium salt... 

Uses Acid-base (pH) indicator useful in the pH range 1.2 (red) - 2.8 (yel.) and 7.4 (yel.) - 9.0 (purple) commonly used as the water-sol. sodium salt or as a sol. in dilute sodium hydroxide Manuf./Distrib. Acros Org. http //www.acros.be-, Fluka http //www.sigma-aldrich.com, Lancaster Synthesis Pfaltz Bauer http //www.pfaitzandbauer.com, TCI Am. http //www.tciamerica. com Cresol red... 

Salicyloyl hydrazide, in H-00112 Salinazid, S-00003 Sarcosine cresol red, S-00004 1 -(2-Selenophenyl)-3-(2-thienyl)-1,3-propanedione, S-00008 >Selenourea, S-00009 Semimethyl thymol blue, S-00011 Semimethylxylenol blue, S-00012 Semiphthalexon S Di-Na salt, in S-00013 Semixylenol orange, S-00014 Septonex, in E-00061 SKF 6270, in M-00069 Sodium diethyldithiocarbamate, in D-00344... 

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