Basic information
- Name:
Thymol Blue
- CAS No.:
76-61-9
- Molecular Structure:
- Formula:
- C27H30O5S
- Molecular Weight:
- 466.59
- Deleted CAS:
- 18611-66-0|264233-99-0|2877-93-2|313494-17-6|354556-94-8|384814-32-8|400864-47-3|405271-03-6|551921-90-5|672309-78-3|720671-81-8
- Synonyms:
- Thymosulfonphthalein;4-[7-(4-hydroxy-2-methyl-5-propan-2-yl-phenyl)-9,9-dioxo-8-oxa-9$l^{6}-thiabicyclo[4.3.0]nona-1,3,5-trien-7-yl]-5-methyl-2-propan-2-yl-phenol;Phenol, 4,4-(3H-2,1-benzoxathiol-3-ylidene)bis(5-methyl-2-(1-methylethyl)-, S,S-dioxide;Thymolsulfophthalein;5-19-03-00462 (Beilstein Handbook Reference);Thymol, 6,6-(3H-2,1-benzoxathiol-3-ylidene)di-, S,S-dioxide;Thymolsulphonphthalein;Thymolsulfonephalein;Thymolsulfonephthalein;Phenol,4,4'-(1,1-dioxido-3H-2,1-benzoxathiol- 3-ylidene)bis[5-methyl-2-(1-methylethyl)-;
- EINECS:
- 200-973-3
- Density:
- 1.252 g/cm3
- Melting Point:
- 221-224 °C
- Boiling Point:
- 580.5 °C at 760 mmHg
- Flash Point:
- 304.9 °C
- Appearance:
- brown to green powder or crystals
- Risk Codes:
- 10
- Safety Description:
- 24/25 Details
- Transport Information:
- UN 1170 3/PG 3
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Specification
The IUPAC name of Thymol blue is 4-[3-(4-hydroxy-2-methyl-5-propan-2-ylphenyl)-1,1-dioxo-2,1λ6-benzoxathiol-3-yl]-5-methyl-2-propan-2-ylphenol. With the CAS registry number 76-61-9, it is also named as Phenol, 4,4'-(3H-2,1-benzoxathiol-3-ylidene)bis(5-methyl-2-(1-methylethyl)-, S,S-dioxide. The product's categories are analytical chemistry; indicator (pH); pH indicators. It is brown to green powder or crystals which is stable, combustible and incompatible with strong oxidizing agents. Dust may form an explosive mixture with air, so people should avoid contact with skin and eyes.
The other characteristics of this product can be summarized as: (1)ACD/LogP: 6.62; (2)# of Rule of 5 Violations: 1; (3)ACD/LogD (pH 5.5): 6.62; (4)ACD/LogD (pH 7.4): 6.62; (5)#H bond acceptors: 5; (6)#H bond donors: 2; (7)#Freely Rotating Bonds: 6; (8)Index of Refraction: 1.611; (9)Molar Refractivity: 129.35 cm3; (10)Molar Volume: 372.4 cm3; (11)Polarizability: 51.27×10-24 cm3; (12)Surface Tension: 51.3 dyne/cm; (13)Enthalpy of Vaporization: 90.05 kJ/mol; (14)Vapour Pressure: 4.46E-14 mmHg at 25°C; (15)Rotatable Bond Count: 4; (16)Tautomer Count: 45; (17)Exact Mass: 466.181395; (18)MonoIsotopic Mass: 466.181395; (19)Topological Polar Surface Area: 92.2; (20)Heavy Atom Count: 33; (21)Complexity: 751.
Uses of Thymol blue: It is used as medicine in clinical diagnosis. And it is also used as pH indicator which has two color range: (1) changes from red to yellow between 1.2-2.8 in acid range; (2) changes from yellow to blue between 8.0-9.6 in alkaline range.
People can use the following data to convert to the molecule structure.
1. SMILES: O=S2(=O)OC(c1ccccc12)(c3cc(c(O)cc3C)C(C)C)c4cc(c(O)cc4C)C(C)C;
2. InChI: InChI=1/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.