Phenol Red
- CAS No.
- 143-74-8
- Chemical Name:
- Phenol Red
- Synonyms
- PR;PHENOLSULFONPHTHALEIN;phenolsulphonphthalein;A-HYDROXY-A A-BIS(P-HYDROXYPHENYL)-O-TOLUENESULFONIC ACID G-SULTONE;PRGR;NR3C3;P3532-5G;Phenolrde;Phenol re;PHENOL RED
- CBNumber:
- CB3780134
- Molecular Formula:
- C19H14O5S
- Molecular Weight:
- 354.38
- MDL Number:
- MFCD00003552
- MOL File:
- 143-74-8.mol
- MSDS File:
- SDS
- TDS File:
- TDS
| Melting point | >300 °C |
|---|---|
| Boiling point | >300°C |
| bulk density | 200-300kg/m3 |
| Density | 1.445 Mg m-3 |
| refractive index | 1.5300 (estimate) |
| Flash point | >300°C |
| storage temp. | no restrictions. |
| solubility | 1 M NaOH: soluble1mg/mL |
| form | Solid |
| pka | 7.9(at 25℃) |
| color | Red |
| PH Range | 6.6(YELLOW)-8.0(RED) |
| Odor | Odorless |
| PH | 6.8~8.4 |
| Water Solubility | 0.77 g/L |
| λmax | 557nm, 558nm, 360nm, 423nm, 433nm |
| ε(extinction coefficient) |
≥10000 at 288-294nm in H2O ≥55000 at 555-561nm in H2O ≥7000 at 357-363nm in H2O |
| Merck | 14,7247 |
| BRN | 326470 |
| Major Application | Display device, sol-gel matrix, photoreceptors, fuel cells, waveguides, paints, detergents, cosmetics, antiperspirant composition, diapers, screening bacteria, detecting viable cells, diagnosis of urogenital ureaplasmosis, treatment of pathogen infections, amyloid-associated diseases, glaucoma, pulmonary hypertension, asthma, chronic obstructive pulmonary disease, erectile dysfunction, Raynaud’s syndrome, heparin overdose, vulvodynia, wound healing, psychoactive drugs, evaluating dental caries activity |
| Cosmetics Ingredients Functions | BUFFERING |
| 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 |
| InChIKey | BELBBZDIHDAJOR-UHFFFAOYSA-N |
| LogP | 3.020 |
| CAS DataBase Reference | 143-74-8(CAS DataBase Reference) |
| EWG's Food Scores | 1 |
| NCI Dictionary of Cancer Terms | PR |
| FDA UNII | I6G9Y0J1OJ |
| EPA Substance Registry System | Phenol Red (143-74-8) |
| UNSPSC Code | 12352207 |
| NACRES | NA.75 |
SAFETY
Risk and Safety Statements
| Symbol(GHS) |  GHS07 |
|||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Signal word | Warning | |||||||||
| Hazard statements | H315-H335 | |||||||||
| Precautionary statements | P261-P264-P271-P280-P302+P352-P304+P340+P312 | |||||||||
| target organs | Respiratory system | |||||||||
| Hazard Codes | Xi,C | |||||||||
| Risk Statements | 36/37/38-34 | |||||||||
| Safety Statements | 37/39-26-45-36/37/39-27 | |||||||||
| WGK Germany | 3 | |||||||||
| RTECS | SJ7490000 | |||||||||
| TSCA | TSCA listed | |||||||||
| HS Code | 29349990 | |||||||||
| Storage Class | 11 - Combustible Solids | |||||||||
| Hazard Classifications | Skin Irrit. 2 STOT SE 3 |
|||||||||
| Toxicity | LD50 orl-rat: >600 mg/kg CTOXAO 4(2),185,71 | |||||||||
| NFPA 704 |
|
Phenol Red price More Price(94)
| Manufacturer | Product number | Product description | CAS number | Packaging | Price | Updated | Buy |
|---|---|---|---|---|---|---|---|
| Sigma-Aldrich | 114529 | Phenol Red ACS reagent | 143-74-8 | 5g | $31.8 | 2026-04-30 | Buy |
| Sigma-Aldrich | 114529 | Phenol Red ACS reagent | 143-74-8 | 25g | $92.2 | 2026-04-30 | Buy |
| Sigma-Aldrich | 1.59375 | Phenol red (phenolsulfonphthalein) Reag. Ph Eur | 143-74-8 | 1g | $906 | 2026-04-30 | Buy |
| Sigma-Aldrich | 1.07241 | Phenol red indicator ACS | 143-74-8 | 5G | $129 | 2026-04-30 | Buy |
| Sigma-Aldrich | 1.59375 | Phenol red (phenolsulfonphthalein) Reag. Ph Eur | 143-74-8 | 100g | $9060 | 2026-04-30 | Buy |
Phenol Red Chemical Properties, Uses, Production
Description
Phenol red belongs to the class of triphenylmethane dyes and is widely used in the textile industry.
Chemical Properties
dark red powder
Uses
As indicator in 0.02-0.05% alcohol solution. pH 6.8 yellow, 8.4 red.
Uses
Phenol red is used as a non absorbed marker in gravimetric method. It is a pH indicator used in cell biology laboratories and in home swimming pool test kits. It is used to check the kidney function based on the excreted phenol red by colorimetric method.
Uses
Phenol red solution acts as a pH indicator for the culture medium.
Definition
ChEBI: 3H-2,1-Benzoxathiole 1,1-dioxide in which both of the hydrogens at position 3 have been substituted by 4-hydroxyphenyl groups. A pH indicator changing colour from yellow below pH 6.8 to bright pink above pH 8.2, it is commonly used as an indicator in cell cultures and in home swimming pool test kits. It is also used in the (now infrequently performed) phenolsulfonphthalein (PSP) test for estimation of overall blood flow through the kidney.
Application
Phenol red solution has been used:
As a tracer dye for microinjection of zebrafish eggs.
As a component of the mMW medium for preparation of mouse embryos.
In the preparation of versene-ethylenediamine tetraacetic acid (EDTA) solution.
Preparation
Phenol red is prepared in Dulbecco′s Phosphate Buffered Saline.
Biochem/physiol Actions
Phenol Red is a pH indicator which changes color from yellow to red.
Safety Profile
Moderately toxic by ingestion and intravenous routes. Mutation data reported. When heated to decomposition it emits toxicvapors of SOx.
Enzyme inhibitor
This pH-indicating dye (FW = 354.38 g/mol; CAS 143-74-8; pKa = 7.9; yellow < pH 6.8; red > pH 8.4), also known as phenolsulfonphthalein and sulfophthalein, is a diagnostic aid for evaluating renal function. A typical stock indicator solution is 0.1 g phenol red in 28.2 mL 10 mM NaOH and 221.8 mL water. Target(s): aldehyde reductase; glutaminase; gglutamyl transpeptidase; glutathione S-transferase; 4- methyleneglutaminase; phosphate uptake; thromboxane A2/prostaglandin H2 receptor; and thyroglobulin iodination.
Phenol Red Preparation Products And Raw materials
Raw materials
Preparation Products
| Supplier | Tel | Country | ProdList | Advantage | |
|---|---|---|---|---|---|
| Kaiyuan city Shenxin fine chemical co., ltd. | 024-22595298 18698863499 | 1253960@qq.com | China | 165 | 58 |
| Shenyang Shengyuan chemical industry co., ltd | 13190211560 | 1319074246@qq.com | China | 95 | 58 |
| Shenyang Delier Biotechnology Co., Ltd. | 15942301471 15942301471 | 15942301471@163.cn | China | 114 | 58 |
| Anhui kuer Bioengineering Co., Ltd | 0551-65171243 13856024262 | kuer@kuerhuaxue.com | China | 2996 | 55 |
| henyang Zhuohua Biotechnology Co., Ltd. | 13940293610 13940293610 | 332189598@qq.com | China | 96 | 58 |
| Shenyang Snota Biotech Co.,Ltd | +86-024-31174117 18002429090 | 2193387905@qq.com | China | 104 | 58 |
| 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 |
| future industrial shanghai co., ltd | 400-0066400 13621662912 | sales@jonln.com | China | 1989 | 65 |
| Alfa Aesar | 400-6106006 | saleschina@alfa-asia.com | China | 30103 | 84 |
Related Questions
Ask a questionView Latest Price from Phenol Red manufacturers
| Image | Update time | Product | Price | Min. Order | Purity | Supply Ability | Manufacturer | |
|---|---|---|---|---|---|---|---|---|
 |
2026-10-10 | phenol red
143-74-8
|
$100.00 | 1KG | 99% | 1000 KG | HANGZHOU DINGYAN CHEM CO.,LTD | |
 |
2026-09-02 | Phenol Red
143-74-8
|
$2.00-5.00 | 1kg | 99% | Henan Fengda Chemical Co., Ltd | ||
 |
2026-08-29 | Phenol Red
143-74-8
|
$29.00 | 99.95% | 10g | TargetMol Chemicals Inc. |
-
- phenol red
143-74-8
- $100.00
- 99%
- HANGZHOU DINGYAN CHEM CO.,LTD
-
- Phenol Red
143-74-8
- $2.00-5.00
- 99%
- Henan Fengda Chemical Co., Ltd
-
- Phenol Red
143-74-8
- $29.00
- 99.95%
- TargetMol Chemicals Inc.
