Skip to Content
Merck

114529

Phenol Red

ACS reagent

Synonym(s):

Phenolsulfonphthalein

Sign In to View Organizational & Contract Pricing.

Select a Size

About This Item

Empirical Formula (Hill Notation):
C19H14O5S
CAS Number:
143-74-8
Molecular Weight:
354.38
UNSPSC Code:
12171500
NACRES:
NA.47
PubChem Substance ID:
24847179
EC Number:
205-609-7
Beilstein/REAXYS Number:
326470
MDL number:
MFCD00003552

Key Documents

View All Documentation
Technical Service
Need help? Our team of experienced scientists is here for you.
Let Us Assist
Technical Service
Need help? Our team of experienced scientists is here for you.
Let Us Assist

InChI key

BELBBZDIHDAJOR-UHFFFAOYSA-N

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

SMILES string

Oc1ccc(cc1)C2(OS(=O)(=O)c3ccccc23)c4ccc(O)cc4

grade

ACS reagent

form

powder

clarity of soln

passes test

technique(s)

titration: suitable

visual transition interval

6.8-8.2, yellow to red

solubility

water: 0.77 g/L at 100 °C

λmax

360 nm, 557 nm (2nd)

ε (extinction coefficient)

≥10000 at 288-294 nm in H2O, ≥55000 at 555-561 nm in H2O, ≥7000 at 357-363 nm in H2O

application(s)

diagnostic assay manufacturing
hematology
histology

storage temp.

room temp

Quality Level

200

Looking for similar products? Visit Product Comparison Guide

Related Categories

General description

Phenol Red is a phenolsulfonphthalein compound. It is present as a sulfonated hydroxyquinone in weakly acidic aqueous solutions. In alkaline solutions, the dye forms a hydrophilic dianion (a small, red anion that has a larger conjugated system than the yellow hydroxyquinone).

Application

Phenol red is commonly used as a pH indicator in biology and medicine. It is incorporated into microbiological culture media for the identification of Escherichia coli strains. Its clinical diagnostic applications include the investigation of gastric and duodenal ulcers and the assessment of tear function in ophthalmology. Phenol red is also used as a tracer to assess the permeability of the ileal mucosal membrane and to assess bacterial leakage through root-filling materials in dentistry.
Phenol Red has been used for the preparation of phenol red gavage meal for measurement of gastric emptying in rats.
Suitable for use as a pH indicator.

Biochem/physiol Actions

Phenol Red is a pH indicator which changes color from yellow to red.

pictograms

Exclamation mark
GHS07

signalword

Warning

hcodes

H315,H335

Hazard Classifications

Skin Irrit. 2 - STOT SE 3

target_organs

Respiratory system

Storage Class

11 - Combustible Solids

wgk

WGK 3

flash_point_f

Not applicable

flash_point_c

Not applicable

ppe

dust mask type N95 (US), Eyeshields, Gloves

Regulatory Listings

Regulatory Listings are mainly provided for chemical products. Only limited information can be provided here for non-chemical products. No entry means none of the components are listed. It is the user’s obligation to ensure the safe and legal use of the product.

114529-25G: + 114529-VAR: + 114529-5G: + 114529-BULK:

jan

Choose from one of the most recent versions:

Certificates of Analysis (COA)

Lot/Batch Number
SHBN9335
SHBN6082
SHBM9656
SHBN1510
SHBM7414

Don't see the Right Version?

If you require a particular version, you can look up a specific certificate by the Lot or Batch number.

Search for a COA

Already Own This Product?

Find documentation for the products that you have recently purchased in the Document Library.

Visit the Document Library

Preclinical gastrointestinal prokinetic efficacy and endocrine effects of the ghrelin mimetic RM-131.
Van der Ploeg L, et al.
Life Sciences, 109, 20-29 (2014)
TiO2 nanotube arrays of 1000 ?m length by anodization of titanium foil: phenol red diffusion.
Paulose M, et al.
The Journal of Physical Chemistry C, 111, 14992-14997 (2007)
Shin-Nosuke Uno et al.
Nature chemistry, 6(8), 681-689 (2014-07-24)
Single-molecule localization microscopy is used to construct super-resolution images, but generally requires prior intense laser irradiation and in some cases additives, such as thiols, to induce on-off switching of fluorophores. These requirements limit the potential applications of this methodology. Here
Sabine C Den Hartogh et al.
Stem cells (Dayton, Ohio), 33(1), 56-67 (2014-09-05)
Understanding early differentiation events leading to cardiogenesis is crucial for controlling fate of human pluripotent stem cells and developing protocols that yield sufficient cell numbers for use in regenerative medicine and drug screening. Here, we develop a new tool to
Lynsey M Cree et al.
Human reproduction (Oxford, England), 30(6), 1410-1420 (2015-03-31)
Does maternal ageing and ovarian stimulation alter mitochondrial DNA (mtDNA) copy number and gene expression of oocytes and cumulus cells from a novel bovine model for human IVF? Oocytes collected from females with identical nuclear genetics show decreased mtDNA copy
View All Related Papers

Protocols

Hand-casting gels for PAGE and SDS-PAGE using mPAGE® TurboMix Bis-Tris Gel Casting Kits

Simplify your SDS-PAGE gel preparation with our pre-mixed solutions and protocols to achieve precise protein separation.

mPAGE® TurboMix™ Bis -Trisゲルキャスティングキットを用いたPAGEおよびSDS-PAGE用ハンドキャストゲル

メルクのプレミックス溶液とプロトコルでSDS-PAGEゲル調製を簡素化し、正確なタンパク質分離を達成しましょう。

Our team of scientists has experience in all areas of research including Life Science, Material Science, Chemical Synthesis, Chromatography, Analytical and many others.

Contact Technical Service