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Phenol red

CAT: 0926-FP01364-03Size: 1 KgDry Ice: NoHazardous: No
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CAS Number
143-74-8
Synonyms
Phenolsulfonephthalein;3,3-Bis (p-hydroxyphenyl) -3H-2,1-benzoxathiole 1,1-dioxide
MDL Number
MFCD00003552
Molecular Formula
C19H14O5S
Molecular Weight
354.38 g/mol
Controlled
No

Chemical Information

Phenol Red

Phenol red is 3H-2,1-Benzoxathiole 1,1-dioxide in which both of the hydrogens at position 3 have been substituted by 4-hydroxyphenyl groups. A pH indicator changing colour from yellow below pH 6.8 to bright pink above pH 8.2, it is commonly used as an indicator in cell cultures and in home swimming pool test kits. It is also used in the (now infrequently performed) phenolsulfonphthalein (PSP) test for estimation of overall blood flow through the kidney. It has a role as a diagnostic agent, an acid-base indicator and a two-colour indicator. It is a member of phenols, a 2,1-benzoxathiole, a sultone and an arenesulfonate ester.

CAS Number143-74-8
PubChem CID4766
IUPAC Name4-[3-(4-hydroxyphenyl)-1,1-dioxo-2,1lambda6-benzoxathiol-3-yl]phenol
Molecular FormulaC19H14O5S
Molecular Weight354.4
XLogP3
Topological Polar Surface Area92.2
Hydrogen Bond Donor Count2
Hydrogen Bond Acceptor Count5
Rotatable Bond Count2
Heavy Atom Count25
Formal Charge0
Complexity545
SMILES
C1=CC=C2C(=C1)C(OS2(=O)=O)(C3=CC=C(C=C3)O)C4=CC=C(C=C4)O
InChI
InChI=1S/C19H14O5S/c20-15-9-5-13(6-10-15)19(14-7-11-16(21)12-8-14)17-3-1-2-4-18(17)25(22,23)24-19/h1-12,20-21H
InChIKey
BELBBZDIHDAJOR-UHFFFAOYSA-N
Chemical Structure
2D Structure
2D structure of Phenol Red
CAS: 143-74-8
CID: 4766
Formula: C19H14O5S
MW: 354.4
Interactive 3D Structure
Loading 3D structure...
View on PubChemRaw 3D data
Computed Properties
PropertyValue
Molecular Weight354.4
XLogP33
Hydrogen Bond Donor Count2
Hydrogen Bond Acceptor Count5
Rotatable Bond Count2
Exact Mass354.05619472
Monoisotopic Mass354.05619472
Topological Polar Surface Area92.2 Ų
Heavy Atom Count25
Formal Charge0
Complexity545
Isotope Atom Count0
Defined Atom Stereocenter Count0
Undefined Atom Stereocenter Count0
Defined Bond Stereocenter Count0
Undefined Bond Stereocenter Count0
Covalently-Bonded Unit Count1
Compound Is CanonicalizedYes

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