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Merck
CN

P4758

Phenol Red sodium salt

Powder

Synonym(s):

Phenolsulfonephthalein sodium salt

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About This Item

Empirical Formula (Hill Notation):
C19H13NaO5S
CAS Number:
34487-61-1
Molecular Weight:
376.36
NACRES:
NA.47
PubChem Substance ID:
24898497
UNSPSC Code:
12171500
EC Number:
252-057-8
MDL number:
MFCD00066901
Beilstein/REAXYS Number:
6260026

Key Documents

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Product Name

Phenol Red sodium salt, pH indicator dye

SMILES string

[Na+].Oc1ccc(cc1)C2(OS(=O)(=O)c3ccccc23)c4ccc([O-])cc4

InChI key

HKHYOKBQJILTEI-UHFFFAOYSA-M

InChI

1S/C19H14O5S.Na/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;/q;+1/p-1

form

powder

technique(s)

titration: suitable

color

red to brown

visual transition interval

6.8-8.2, yellow to red

mp

285 °C (dec.) (lit.)

solubility

water: 1 mg/mL, opaque, dark red

εmax

31.62 at 423 nm in 0.1 M phosphate buffer

application(s)

diagnostic assay manufacturing
hematology
histology

storage temp.

room temp

Quality Level

200

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Application

Phenol Red sodium salt has been used as an indicator during single-guide RNA microinjection into one-cell stage zebrafish embryos.
Suitable for use as a pH indicator.

General description

Phenol Red sodium salt is widely used as a pH indicator. At a pH of 6.4 and below, phenol red solution will have a yellow color. At a pH of 8.2 and above, it will have a red color. It is commonly used in culture media to detect neutral to acidic pH changes.

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

ppe

dust mask type N95 (US), Eyeshields, Gloves

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Certificates of Analysis (COA)

Lot/Batch Number
SHBT4909
SHBT0613
SHBS9248
SHBS6318
SHBR0686

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