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PHENOL RED (pH indicator)

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PHENOL RED (pH indicator)
Molecular structure
Chemical Product

PHENOL RED (pH indicator)

Cat. NoKC.1610117 CategoryDyes & Indicators Molecular FormulaC19H14O5S CAS143-74-8 Molecular Weight354.4 g/mol
Pack sizes 5GM25GM100GM
Safety & Hazards (GHS) Warning
Irritant Irritant

⚠️ For information only; not a substitute for the official Safety Data Sheet (SDS).

Red dye, pH indicator, and diagnostic aid for determination of renal function. It is used also for studies of the gastrointestinal and other systems.

  • Used as a pH indicator and marker of kidney function and other physiological functions; [CHEMINFO] Used as a pH indicator for the pH range of 6.4-8.2; [Ullmann]
Physical DescriptionOdorless, red solid; Available as pure compound, soluble monosodium salt, and dilute solutions; [CHEMINFO]
IUPAC Name4-[3-(4-hydroxyphenyl)-1,1-dioxo-2,1lambda6-benzoxathiol-3-yl]phenol
Molecular FormulaC19H14O5S
Molecular Weight354.4 g/mol
CAS143-74-8
SMILESC1=CC=C2C(=C1)C(OS2(=O)=O)(C3=CC=C(C=C3)O)C4=CC=C(C=C4)O
InChIKeyBELBBZDIHDAJOR-UHFFFAOYSA-N
Catalog NoKC.1610117
Pack sizes5GM · 25GM · 100GM
  • H315 Causes skin irritation
  • H319 Causes serious eye irritation
  • H335 May cause respiratory irritation

⚠️ For information only; not a substitute for the official SDS.

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