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Phenol Red sodium salt

Phenol Red sodium salt Structure
Phenol Red sodium salt structure
CAS No.
34487-61-1
Chemical Name:
Phenol Red sodium salt
Synonyms
PHENOLSULFONPHTHALEIN;PHENOL RED INDICATOR;ANTHRACENE NEAT;abcolphenolredws;SODIUM PHENOL RED;ACENAPHTHENE NEAT;PHENOL RED SODIUM;Red sodium phenol;PHENOL RED NA-SALT;Phenolsulphonephth
CBNumber:
CB0426392
Molecular Formula:
C19H15NaO5S
Molecular Weight:
378.37
MDL Number:
MFCD00066901
MOL File:
34487-61-1.mol
MSDS File:
SDS
TDS File:
TDS
Last updated:2026-07-02 14:34:02
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Phenol Red sodium salt Properties

Melting point 285 °C (dec.)(lit.)
Boiling point 285 °C
Density 0.972
storage temp. room temp
solubility H2O: clarity passes test
form Shiny Powder
pka 7.69, 7.9, 1.3(at 25℃)
color White
Odor Odorless
PH Range Yellow (6.8) to red (8.4)
Water Solubility soluble
λmax 423nm, 557nm
ε(extinction coefficient) ≥19000 at 422-426nm in methanol
≥900 at 256-269nm in methanol
Merck 14,7247
BRN 6260026
Stability Stable. Incompatible with strong oxidizing agents.
Major Application Sensor, optical device, paints, sterilization process, fertilizer, detecting viable cells, gastrointestinal mucosa, antibacterial agent, drugs, pharmacology
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
InChIKey HKHYOKBQJILTEI-UHFFFAOYSA-M
SMILES [Na+].Oc1ccc(cc1)C2(OS(=O)(=O)c3ccccc23)c4ccc([O-])cc4
CAS DataBase Reference 34487-61-1(CAS DataBase Reference)
EWG's Food Scores 1
FDA UNII 50J9732WBG
ATC code V04CH03
EPA Substance Registry System Phenol, 4,4'-(1,1-dioxido-3H-2,1-benzoxathiol-3-ylidene)bis-, monosodium salt (34487-61-1)
UNSPSC Code 12171502
NACRES NA.47

SAFETY

Risk and Safety Statements

Symbol(GHS)  Exclamation Mark (GHS07)
GHS07
Signal word  Warning
Hazard statements  H315-H335
Precautionary statements  P261-P264-P271-P280-P302+P352-P304+P340+P312
target organs Respiratory system
PPE dust mask type N95 (US), Eyeshields, Gloves
Hazard Codes  Xi,C
Risk Statements  36/37/38-34
Safety Statements  26-36-37/39-45-36/37/39-27
WGK Germany  3
TSCA  TSCA listed
HS Code  29349990
Storage Class 11 - Combustible Solids
Hazard Classifications Skin Irrit. 2
STOT SE 3
NFPA 704
1
2 0

Phenol Red sodium salt price More Price(74)

Manufacturer Product number Product description CAS number Packaging Price Updated Buy
Sigma-Aldrich 114537 Phenol Red sodium salt ACS reagent, Dye content 90% 34487-61-1 5g $36.8 2026-04-30 Buy
Sigma-Aldrich 114537 Phenol Red sodium salt ACS reagent, Dye content 90% 34487-61-1 25g $125 2026-04-30 Buy
Sigma-Aldrich 1.11748 Phenol red sodium salt indicator ACS 34487-61-1 5G $79.7 2026-04-30 Buy
TCI Chemical P0102 Phenol Red Sodium Salt 34487-61-1 5g $25 2026-04-30 Buy
TCI Chemical P0102 Phenol Red Sodium Salt 34487-61-1 25g $68 2026-04-30 Buy
Product number Packaging Price Buy
114537 5g $36.8 Buy
114537 25g $125 Buy
1.11748 5G $79.7 Buy
P0102 5g $25 Buy
P0102 25g $68 Buy

Phenol Red sodium salt Chemical Properties, Uses, Production

Chemical Properties

red liquid or red/brown crystals, slightly soluble in water, alcohol and acetone. Almost insoluble in ether and chloroform, soluble in hydroxide base or carbonate base solution with deep red color, stable in air, used as acid-base indicator.

Uses

Phenol Red Sodium Salt is a water soluble pH indicator commonly employed in cell biology laboratories as a cell tissue culture pH marker. Phenol Red sodium salt is a water soluble pH indicator used in the 6.8 (yellow) to 8.2 (red) range. It is commonly employed in cell biology laboratories as a cell tissue culture pH marker. Under normal conditions, phenol red added to the growth medium will have a pink-red color. Usually 15 mg/l is used to produce this effect. If problems arise, such as dying cells or overgrowth of contaminants, this will cause a change in pH resulting in a change in indicator color. This color change is an indication that the medium needs to be replaced. Additionally, Phenol Red could potentially be useful as a differentiation factor. It can also be used as reactant/reag

Uses

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

Uses

Phenol Red has been used for preparation of phosphate buffer saline (PBS)-with phenol red for microfluidic assay for simultaneous culture of multiple cell types. It has also been used for horseradish peroxidase-phenol red (HRP-PR) H2O2 (hydrogen peroxide) detection assay to identify redox cycling compounds.

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.

Biochem/physiol Actions

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

Phenol Red sodium salt Preparation Products And Raw materials

Raw materials

Preparation Products

Phenol Red sodium salt Suppliers

Global Suppliers ( 377)
Supplier Tel Email Country ProdList Advantage
Shenyang Xianchuang Chemical Co., Ltd. 024-23769576 13840269002 274311108@qq.com China 358 58
Shanghai Biological Technology Development Co., Ltd. 021-69955236-807 13918189704 chinaruji@chinaruji.com China 5093 55
J & K SCIENTIFIC LTD. 18210857532 18210857532 jkinfo@jkchemical.com China 96815 76
Meryer (Shanghai) Chemical Technology Co., Ltd. 4006356688 18621169109 market03@meryer.com China 40202 62
3B Pharmachem (Wuhan) International Co.,Ltd. 18930552037 3bsc@sina.com China 15813 69
Alfa Aesar 400-6106006 saleschina@alfa-asia.com China 30103 84
TCI (Shanghai) Development Co., Ltd. 021-67121386 Sales-CN@TCIchemicals.com China 24512 81
Energy Chemical 400-0056266 sales8178@energy-chemical.com China 44850 61
Shanghai Hanhong Scientific Co.,Ltd. 021-54306202 13764082696 info@hanhongsci.com China 42917 64
Sichuan Kulinan Technology Co., Ltd 400-1166-196 18981987031 cdhxsj@163.com China 11674 57
Supplier Advantage
Shenyang Xianchuang Chemical Co., Ltd. 58
Shanghai Biological Technology Development Co., Ltd. 55
J & K SCIENTIFIC LTD. 76
Meryer (Shanghai) Chemical Technology Co., Ltd. 62
3B Pharmachem (Wuhan) International Co.,Ltd. 69
Alfa Aesar 84
TCI (Shanghai) Development Co., Ltd. 81
Energy Chemical 61
Shanghai Hanhong Scientific Co.,Ltd. 64
Sichuan Kulinan Technology Co., Ltd 57

Related Questions

Ask a question
Q:What is the concentration of phenol red sodium salt indicating solution?Walter - Jul 2,2026
A:Add 0.04 g phenol red sodium salt in 100 mL water, the solution can be used as pH indicator. pH 1.2 ~ 3.0, the color changes from brownish-orange to yellow; pH 6.5 ~ 8.0, it changes from brownish-yellow to red-violet.

View Latest Price from Phenol Red sodium salt manufacturers

Image Update time Product Price Min. Order Purity Supply Ability Manufacturer
Phenol Red sodium salt pictures 2026-08-12 Phenol Red sodium salt
34487-61-1
 $158.00 1KG 99% 10T Baoji Guokang Healthchem Co., Ltd.
Phenol Red sodium salt pictures 2026-05-28 Phenol Red sodium salt
34487-61-1
 $80.60 1KG 99% 5000kg Hebei Chuanghai Biotechnology Co,.LTD
Phenol Red sodium salt pictures 2025-04-15 Phenol Red sodium salt
34487-61-1
 $25.00-85.00 1kg 99% 20ton Hebei Zhuanglai Chemical Trading Co.,Ltd

Phenol Red sodium salt Spectrum

Phenol Red sodium salt(34487-61-1)IR1Phenol Red sodium salt(34487-61-1)IR2

34487-61-1 (Phenol Red sodium salt) Related Search:

Sodium citrate Bromophenol Red Sodium benzenolate Trisodium phosphate 4-Aminophenol
3-Aminophenol Chlorophyllin Phenol Phenol Red 2-Phenylphenol
PYROGALLOL RED Sodium hydroxide Sodium benzoate Diclofenac sodium Sodium bicarbonate
Sodium chloride Sodium acetate 8-Chloroadenosine-3',5'-cyclic monophosphorothioate, RP-isomer sodium salt

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SODIUM PHENOL RED PHENOLSULFONEPHTHALEIN MONOSODIUM SALT PHENOLSULFONEPHTHALEIN SODIUM SALT PHENOLSULFONPHTHALEIN NA-SALT PHENOLSULFONPHTHALEIN, SODIUM SALT PHENOLSULPHONEPHTHALEIN SODIUM SALT PHENOL RED, WATER SOLUBLE PHENOL RED NA-SALT PHENOL RED SODIUM SALT PHENOL RED SODIUM SALT(WATER SOLUBLE) abcolphenolredws Phenol,4,4’-(3H-2,1-benzoxathiol-3-ylidene)bis-,S,S-dioxide,monosodiumsalt 3,3-BIS(P-HYDROXYPHENYL)-2,1-3H-BENZOXATHIOLE SODIUM SALT Phenol red solution sodium salt Phenol Red, Water Soluble, Reagent Sodium 4-[3-(4-hydroxyphenyl)-1,1-dioxobenzo[c]oxathiol-3-yl]phenolate 3-(4-Hydroxyphenyl)-3-(4-sodiooxyphenyl)-3H-2,1-benzoxathiole-1,1-dioxide 3-(4-Sodiooxyphenyl)-3-(4-hydroxyphenyl)-3H-2,1-benzoxathiole 1,1-dioxide PHENOL RED SODIUM SALT INDICATOR ACS Phenol Red, sodium salt,pure,water soluble, indicator Phenol Red sodium salt,pure,conform to ACS Phenolsulphonephth PHENOL RED.NA-SALTPURE Phenol Red, water soluble p.a. ACENAPHTHENE NEAT ANTHRACENE NEAT TRIETHANOLAMINE HYDROCHLORIDE REAGENT GR SodiuM 4-(3-(4-hydroxyphenyl)-1,1-dioxido-3H-benzo[c][1,2]oxathiol-3-yl)phenolate -1,1-dioxido-3H-benzo[c][1,2]oxathiol-3-yl) Sodium 4-(3-(4-hydroxyphenyl) Phenol Red Indicator Solution, 0.02% w/v Phenol Red, pH 6.8-8.2 Phenolsulfone-phthalein Sodium Phenol Red sodium salt, conform to ACS, pure PHENOL RED SOLUTION, 0.04% AQUEOUS Phenol, 4,4-(1,1-dioxido-3H-2,1-benzoxathiol-3-ylidene)bis-, monosodium salt PHENOLRED,WATERSOLUBLE,REAGENT,ACS PHENOL RED WATER SOLUTION Phenol Red sodium salt, 0.02% w/v aq. soln. Phenol Red, sodium salt, water soluble, indicator, pure PHENOL RED SODIUM SALT, REAGENT (ACS) sodium hydrogen 4,4'-(3H-2,1-benzoxathiol-3-ylidene)bisphenolate S,S-dioxide PHENOL RED SODIUM PHENOL RED SODIUM ACS REAGENT PHENOL RED, SODIUM SALT, A.C.S. REAGENT PHENOL RED WATER-SOLUBLE, INDICATOR,REAG . ACS PHENOL RED SODIUM SALT 0.04 WT. % IN & PHENOL RED, SODIUM SALT, 0.04 WT. % SOLU TION IN WATER Phenol red sodium salt solution PHENOL RED SODIUM CELL CULTURE TESTED PhenolRedWaterSolubleIndicator PhenolRedsodiumsalt,ACS Phenol Red sodium salt, AR PHENOL RED SODIUM SALT PWD PHENOL RED SOLUTION, 0.04% AQUEOUSPHENOL RED SOLUTION, 0.04% AQUEOUSPHENOL RED SOLUTION, 0.04% AQUEOUS PHENOL RED, SODIUM SALT, REAGENT (ACS)PHENOL RED, SODIUM SALT, REAGENT (ACS)PHENOL RED, SODIUM SALT, REAGENT (ACS) 3,3-Bis(4-hydroxyphenyl)-3H-benzo[c][1,2]oxathiole 1,1-dioxide, sodium salt Phenol red sodium salt, indicator AR