ChemicalBook >> CAS DataBase List >>Thymol Blue
Thymol Blue
- CAS No.
- 76-61-9
- Chemical Name:
- Thymol Blue
- Synonyms
- TB;s-dioxide;bleudethymol;THYMOL BLUE TS;THYMOL BLUE INDICATOR;THYMOLSULFONEPHTHALEIN;S NO 879;Nsc 11238;THYMOL BLUE;Thymol Blue,IND
- CBNumber:
- CB3672398
- Molecular Formula:
- C27H30O5S
- Molecular Weight:
- 466.59
- MDL Number:
- MFCD00005869
- MOL File:
- 76-61-9.mol
- MSDS File:
- SDS
- TDS File:
- TDS
Last updated:2026-07-03 11:45:39
| Product description | Number | Pack Size | Price |
| Thymol Blue ACS reagent | 114545 | 5g | $53.4 |
| Thymol Blue ACS reagent | 114545 | 25g | $161 |
| Thymol blue indicator ACS,Reag. Ph Eur | 1.08176 | 5G | $107 |
| Thymol blue indicator ACS,Reag. Ph Eur | 1.08176 | 25g | $266 |
| Thymol Blue | T0235 | 1g | $37 |
| More product size | |||
| Melting point | 221-224 °C (dec.) (lit.) |
|---|---|
| Boiling point | 539.4°C (rough estimate) |
| Density | 1.1413 (rough estimate) |
| bulk density | 350kg/m3 |
| refractive index | 1.5300 (estimate) |
| Flash point | 36 °C |
| storage temp. | room temp |
| solubility | 0.11g/l |
| form | Solid |
| pka | Pka1:1.65(at 25℃)(PH=1.2 to 2.8) Pka2:8.9(at 25℃)(PH=8.0 to 9.6) |
| color | Dark green to dark brown |
| PH Range | 1.2(red)-2.8(yellow) 8(yellow)-9.6(blue) |
| Odor | Characteristic odour |
| PH |
1.2-2.8 8.0-9.6 |
| Water Solubility | Soluble in alcohol and dilute alkali solutions. Insoluble in water. |
| ε(extinction coefficient) | ≥12000 at 298-302nm in 0.1 M NaOH at 0.01g/L |
| λmax | 594nm, 376nm, 544nm, 430nm |
| Merck | 14,9400 |
| BRN | 368036 |
| Stability | Stable. Combustible. Dust may form an explosive mixture with air. Incompatible with strong oxidizing agents. |
| Major Application | Display device, semiconductors, sensors, fuel cells, antimisting coating for glass, toys, corrosion inhibitor, multi-level alert system, correction fluid, textiles, falsification-proof security paper, packaging system, measurement of hydrogen ion concentrationin swimming pool water, humidity-indicating agent, diapers, cosmetics, biostatic materials, determine bacteria growth, psychoactive drugs, antidepressant drugs, dental impression material |
| InChI | 1S/C27H30O5S/c1-15(2)19-13-22(17(5)11-24(19)28)27(21-9-7-8-10-26(21)33(30,31)32-27)23-14-20(16(3)4)25(29)12-18(23)6/h7-16,28-29H,1-6H3 |
| InChIKey | PRZSXZWFJHEZBJ-UHFFFAOYSA-N |
| SMILES | CC(C)c1cc(c(C)cc1O)C(=C2\C=C(C(C)C)C(=O)C=C2C)\c3ccccc3S(O)(=O)=O |
| CAS DataBase Reference | 76-61-9(CAS DataBase Reference) |
| EWG's Food Scores | 1 |
| FDA UNII | 8YB4804L4M |
| NIST Chemistry Reference | Thymolsulfonephthalein(76-61-9) |
| EPA Substance Registry System | Phenol, 4,4'-(1,1-dioxido-3H-2,1-benzoxathiol-3-ylidene)bis[5-methyl-2-(1-methylethyl)- (76-61-9) |
| UNSPSC Code | 12171502 |
| NACRES | NB.21 |
SAFETY
Risk and Safety Statements
| Symbol(GHS) |  GHS07 |
|||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Signal word | Warning | |||||||||
| Hazard statements | H225-H301+H311+H331 | |||||||||
| Precautionary statements | P280-P305+P351+P338 | |||||||||
| Risk Statements | 10 | |||||||||
| Safety Statements | 24/25 | |||||||||
| RIDADR | UN 1170 3/PG 3 | |||||||||
| WGK Germany | 3 | |||||||||
| RTECS | XP2575000 | |||||||||
| TSCA | TSCA listed | |||||||||
| HS Code | 2934 99 90 | |||||||||
| PackingGroup | II | |||||||||
| Storage Class | 3 - Flammable liquids | |||||||||
| Hazard Classifications | Flam. Liq. 2 | |||||||||
| NFPA 704 |
|
Thymol Blue price More Price(68)
| Manufacturer | Product number | Product description | CAS number | Packaging | Price | Updated | Buy |
|---|---|---|---|---|---|---|---|
| Sigma-Aldrich | 114545 | Thymol Blue ACS reagent | 76-61-9 | 5g | $53.4 | 2026-04-30 | Buy |
| Sigma-Aldrich | 114545 | Thymol Blue ACS reagent | 76-61-9 | 25g | $161 | 2026-04-30 | Buy |
| Sigma-Aldrich | 1.08176 | Thymol blue indicator ACS,Reag. Ph Eur | 76-61-9 | 5G | $107 | 2026-04-30 | Buy |
| Sigma-Aldrich | 1.08176 | Thymol blue indicator ACS,Reag. Ph Eur | 76-61-9 | 25g | $266 | 2026-04-30 | Buy |
| TCI Chemical | T0235 | Thymol Blue | 76-61-9 | 1g | $37 | 2026-04-30 | Buy |
Thymol Blue Chemical Properties,Uses,Production
Chemical Properties
brown to green powder or crystals
Uses
As as acid-base indicator; pH: red 1.2 to yellow 2.8; also yellow 8.0 to blue 9.6.
Uses
Thymol Blue is a useful pH indicator compound. Dyes and metabolites.
Biochem/physiol Actions
Thymol Blue is a pH indicator, which is yellow/orange at low pH and blue in color at high pH.
Thymol Blue Preparation Products And Raw materials
Global( 394)Suppliers
| Supplier | Tel | Country | ProdList | Advantage | |
|---|---|---|---|---|---|
| Hebei Chuanghai Biotechnology Co,.LTD | +86-86-13131129325 +8613131129325 | sales1@chuanghaibio.com | China | 5220 | 58 |
| Watson Biotechnology Co.,Ltd | +8618186686046 | sales01@watsonbiotech.cn | China | 5731 | 58 |
| Hebei Zhuanglai Chemical Trading Co Ltd | +86-16264648883 | niki@zlchemi.com | China | 7245 | 58 |
| Henan Tianfu Chemical Co.,Ltd. | +86-0371-55170693 +86-19937530512 | info@tianfuchem.com | China | 21585 | 55 |
| career henan chemical co | +86-0371-86658258 +8613203830695 | sales@coreychem.com | China | 29812 | 58 |
| Shenyang Simchoice Chemical Co.,Ltd | +86-024-23769576 +86-15040101888 | sales@simchoicechem.com | China | 254 | 58 |
| CONIER CHEM AND PHARMA LIMITED | +8618523575427 | sales@conier.com | China | 49979 | 58 |
| Tangshan Moneide Trading Co., Ltd. | +86-315-8309571 +8615633399667 | sales@moneidechem.com | China | 574 | 58 |
| Richest Group Ltd | 18017061086 | oled@richest-group.com | CHINA | 5600 | 58 |
| Career Henan Chemica Co | +86-0371-86658258 +8613203830695 | laboratory@coreychem.com | China | 30224 | 58 |
Related Qustion
Ask a questionQ:How to prepare thymol blue solution for pH testing?Walter - Jul 3，2026
A:Thymol blue is a kind of pH indicator. Before using, add 0.04 g in 100 mL Ethanol (20%) or 0.04 g in 0.86 mL Sodium Hydroxide solution, dilute 0.1 mol/L and fill up to 100 mL with water. Its color changes from red to yellow between pH 1.2 and 2.8, and from yellow to blue between pH 8.0 and 9.6.
View Lastest Price from Thymol Blue manufacturers
| Image | Update time | Product | Price | Min. Order | Purity | Supply Ability | Manufacturer | |
|---|---|---|---|---|---|---|---|---|
 |
2026-07-22 | Thymol Blue
76-61-9
|
1kg | 99% | 20MT | Watson Biotechnology Co.,Ltd | ||
 |
2026-07-15 | Thymol Blue
76-61-9
|
$190.00 | 25KG | 98% | 1-10mt | Baoji Guokang Healthchem Co., Ltd. | |
 |
2026-05-28 | Thymol Blue
76-61-9
|
$2.00-5.00 | 1KG | 99% | 10000kg | Hebei Chuanghai Biotechnology Co,.LTD |
-
- Thymol Blue
76-61-9
- 99%
- Watson Biotechnology Co.,Ltd
-
- Thymol Blue
76-61-9
- $190.00
- 98%
- Baoji Guokang Healthchem Co., Ltd.
-
- Thymol Blue
76-61-9
- $2.00-5.00
- 99%
- Hebei Chuanghai Biotechnology Co,.LTD
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