phenol red

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Related to phenol red: phenolphthalein

phe·nol·sul·fon·phthal·e·in (PSP),

(fē'nol-sŭl'fōn-thal'ē-in, -thal'ēn),
An indicator in tissue culture media (yellow at pH 6.8, red at pH 8.4); occurs as a bright to dark red crystalline powder; in the past given by parenteral injection as a test for renal function.
Synonym(s): phenol red
Farlex Partner Medical Dictionary © Farlex 2012

phenol red

A red, water-soluble dye, C19H14O5S, used as an acid-base indicator and in medicine to test kidney function.
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.


1. C6H5OH; a crystalline, colorless or light pink solid, melting at 43°C, obtained from the distillation of coal tar. It has a characteristic odor and is dangerous because of its rapid corrosive action on tissues. Synonym: carbolic acid
2. Any of the aromatic derivatives of benzene with one or more hydroxyl groups attached.

phenol poisoning

See: poisoning

phenol red



A primary color of the spectrum that, when added to blue, forms purple, and when added to yellow, forms orange.

Congo red

An odorless red-brown powder used in testing for amyloid. In polarized light, amyloid treated with Congo red produces a green fluorescence.

cresol red

An indicator of pH. It is yellow below pH 7.4 and red above 9.0.

methyl red

An indicator of pH. It is red at pH 4.4 and yellow at 6.2.
CAS # 493-52-7

phenol red


scarlet red

A red azo dye used to stimulate healing of indolent ulcers, burns, wounds, and so on; in histology, used as a stain. Synonym: rubrum scarlatinum

vital red

A stain used in preparing tissues for microscopic examination.
Medical Dictionary, © 2009 Farlex and Partners
References in periodicals archive ?
U-shape suppressive effect of phenol red on the epileptiform burst activity via activation of estrogen receptors in primary hippocampal culture.
Bone marrow precursors from C57BL/6 (B6: black bars) or B6.NZM.Sle1.Sle2.Sle3 (TCSle: white bars) female and male mice were cultured with GM-CSF in standard phenol red/media conditions (a, c, d) or media lacking phenol red and void of steroids (charcoal-treated FBS: hormone depleted) (b, c, d).
1 mL of Matrigel (Sigma-Aldrich, MO, USA), diluted in phenol red and FBS-free DMEM at a final concentration of 2 mg/mL, was added to the transwell inserts (8.0 [micro]m membrane; Corning, USA) placed on six-well plates and incubated for 24 hours at 37[degrees]C, under 95% humidity/5% C[O.sub.2] atmosphere.
Phenol red dextrose broth (PRDB, Difco), was used for all metabolic inhibition tests.
The PET fibers were dissolved in benzyl alcohol, to which chloroform was added, the solution was neutralized by 1/10 N of a sodium hydrite benzyl alcohol solution using Phenol Red as an indicator, and then the amount of carboxyl end groups was determined.
The media was changed to DMEM without phenol red (Gibco number 31053-028) and 10% charcoal-stripped fetal bovine serum (Gibco number 12676-029) with 1% penicillin-streptomycin 24 h prior to the experiments.
The culturing of the cells was performed in medium containing phenol red. For environmental chemical exposure, RPMI medium with phenol red was applied in some series of some experiments (Figures 1,2, and 5; Figure OS-3 in Supplementary Material available online at 2017/4614379) and without in others (Figure 3; Figures OS4 and OS-5).
Similar to other studies evaluating topical rocuronium in avian species, we used the Schirmer tear test rather than the phenol red thread test despite the smaller size of the phenol red thread.
For the determination of secretolytic activity tracheobronchial secretion of intraperitoneally injected phenol red was determined in mice, while antiinflammatory action was assessed in an acute bacterial bronchitis model in rats.
Acid production from ribose, L-arabinose, and galactose was also tested by using phenol red base medium (Difco Laboratories, Detroit, MI), supplemented with 1% (w/v) sugar, after 48 h of incubation at 37[degrees]C.
Tear production was measured by modified Schirmer tear test I (n = 9 birds) or phenol red thread test (n = 8 birds), and intraocular pressure was measured indirectly by applanation (Tonopen-XL) (n = 9 birds) or rebound (TonoVet) (n = 8 birds) tonometry.