Thymol Blue

Product Name: Thymol Blue
CAS No.: 76-61-9
Chemical Name: Thymol Blue
Synonyms: TB;s-dioxide;bleudethymol;THYMOL BLUE TS;THYMOLSULFONEPHTHALEIN;S NO 879;Nsc 11238;THYMOL BLUE;Thymol Blue,IND;Thymol blue, GR
CBNumber: CB3672398
Molecular Formula: C27H30O5S
Formula Weight: 466.59
MOL File: 76-61-9.mol

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Thymol Blue Property

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)
PH: 1.2-2.8
8.0-9.6
Odor: Characteristic odour
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)
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)

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Safety

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

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Hazard and Precautionary Statements (GHS)

Symbol(GHS)

Signal word

Warning

Hazard statements

H225Highly Flammable liquid and vapour

Precautionary statements

P280Wear protective gloves/protective clothing/eye protection/face protection.

P305+P351+P338IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.

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N-Bromosuccinimide Price

Sigma-Aldrich

Product number: 114545
Product name: Thymol Blue
Purity: ACS reagent
Packaging: 5g
Price: $53.4
Updated: 2026/04/30

Sigma-Aldrich

Product number: 114545
Product name: Thymol Blue
Purity: ACS reagent
Packaging: 25g
Price: $161
Updated: 2026/04/30

Sigma-Aldrich

Product number: 1.08176
Product name: Thymol blue
Purity: indicator ACS,Reag. Ph Eur
Packaging: 5G
Price: $107
Updated: 2026/04/30

Sigma-Aldrich

Product number: 1.08176
Product name: Thymol blue
Purity: indicator ACS,Reag. Ph Eur
Packaging: 25g
Price: $266
Updated: 2026/04/30

TCI Chemical

Product number: T0235
Product name: Thymol Blue
Packaging: 1g
Price: $37
Updated: 2026/04/30

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Thymol Blue Chemical Properties,Usage,Production

Chemical Properties

brown to green powder or crystals

Uses

Thymol Blue is a useful pH indicator compound. Dyes and metabolites.

Uses

As as acid-base indicator; pH: red 1.2 to yellow 2.8; also yellow 8.0 to blue 9.6.

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

Raw materials

Preparation Products

Triethyl orthoacetate

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Thymol Blue Suppliers

Austria 1 Belgium 1 Canada 1 China 294 Czech Republic 2 Europe 2 France 2 Germany 5 India 34 Japan 2 Mexico 1 Poland 2 Switzerland 2 Ukraine 1 United Kingdom 8 United States 36 Global 394

SHENYANG SINOCHEM BIOTECH CO.,LTD

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Shenyang Shengyuan chemical industry co., ltd

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shenyangzhongshenghuagong

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Shenyang Delier Biotechnology Co., Ltd.

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Kaiyuan city Shenxin fine chemical co., ltd.

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J & K SCIENTIFIC LTD.

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Meryer (Shanghai) Chemical Technology Co., Ltd.

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INTATRADE GmbH

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Alfa Aesar

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TCI (Shanghai) Development Co., Ltd.

Tel: 021-67121386
Fax: 021-67121385
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ProdList: 24529
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View Lastest Price from Thymol Blue manufacturers

Watson Biotechnology Co.,Ltd

Product: Thymol Blue 76-61-9
Price: US $0.00-0.00/kg
Min. Order: 1kg
Purity: 99%
Supply Ability: 20MT
Release date: 2024-12-27

Hebei Zhuanglai Chemical Trading Co Ltd

Product: Thymol Blue 76-61-9
Price: US $150.00/kg
Min. Order: 1kg
Purity: 99%
Supply Ability: 500kg
Release date: 2024-12-23

Baoji Guokang Healthchem Co., Ltd.

Product: Thymol Blue 76-61-9
Price: US $190.00/KG
Min. Order: 25KG
Purity: 98%
Supply Ability: 1-10mt
Release date: 2021-06-02

76-61-9, Thymol BlueRelated Search:

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Thymol Blue, for analysis ACS

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bleudethymol

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s-dioxide

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Thymolsulfonephalein

Thymolsulfophthalein

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Thymosulfonphthalein

HALF FRASER BROTH 30X225ML

3,3-Bis(4-hydroxy-5-isopropyl-2-methylphenyl)

Thymol blue, For ACS analysis

Nsc 11238

Thymol Blue, indicator, ACS reagent

3,3-Bis(4-hydroxy-5-isopropyl-2-methylphenyl)-3H-2,1-benzoxathiol 1,1-dioxide

3,3-Bis(4-hydroxy-5-isopropyl-2-methylphenyl)-3H-2,1-benzoxathiole 1,1-dioxide

4,4'-[(3H-2,1-Benzoxathiole 1,1-dioxide)-3-ylidene]bis(5-methyl-2-isopropylphenol)

Thymol Blue,pure,indicator

Thymol blue, indicator, ACS

Thymol blue, solution 0,04%, indicator

Thymol Blue (0.1% in ca. 50% Ethanol)[for Titration]

Thymol Blue p.a.

THYMOL BLUE INDICATOR ACS 5 G

THYMOL BLUE INDICATOR ACS 25 G

4,4'-(3H-2,1-Benzoxathiol-3-ylidene)bis[5-methyl-2-(1-methylethyl)phenol] S,S-dioxide

ThyMol Blue TS, USP Test Solution

3,3-Bis(4-hydroxy-5-isopropyl-2-Methylphenyl)-3H-benzo[c][1,2]oxathiole 1,1-dioxide

ThyMol blue [Ink]