Thymolphthalein indicator - 90% (v/v) ethanol containing 0.05% (w/v) , CAS No.125-20-2

CAS: 125-20-2 Cat. No.: T196524 Molecular Weight: 430.54 Beilstein Registry Number: 359413 EC Number: 204-729-7 PubChem CID: 31316
AVAILABLE TO ORDER
GRADE & PURITY 90% (v/v) ethanol containing 0.05% (w/v)
Synonyms
1(3H)-Isobenzofuranone,3-bis[4-hydroxy-2-methyl-5-(1-methylethyl)phenyl]- | 3,3-bis(4-hydroxy-2-methyl-5-propan-2-ylphenyl)-1-isobenzofuranone | 5',5''-Diisopropyl-2',2''-dimethylphenolphthalein | 3,3-bis[4-hydroxy-2-methyl-5-(propan-2-yl)phenyl]-2-benzof
Storage
Room temperature
Shipped In
Normal
 ·  off list, applied to all prices below.
Size
Status
Price
Qty
100ml
T196524-100ml
3
$37.90
500ml
T196524-500ml
1
$123.90
Enter a quantity for the sizes you want to add.
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Why this grade

90% (v/v) ethanol containing 0.05% (w/v) for sensitive chromatographic and analytical workflows requiring minimal baseline interference.

🌡

Storage & shipping

Room temperature Ships Normal Check lot-specific COA for exact specifications.

📋

Quality documents

SDS, COA, datasheet, and spec sheet available for download. Lot-specific COA accessible via lot number lookup.

📚

Literature proof

Cited in 16 peer-reviewed publications across chromatography, organic synthesis, and cross-coupling reactions.

Specifications

Synonyms
1(3H)-Isobenzofuranone, 3-bis[4-hydroxy-2-methyl-5-(1-methylethyl)phenyl]- | 3, 3-bis(4-hydroxy-2-methyl-5-propan-2-ylphenyl)-1-isobenzofuranone | 5', 5''-Diisopropyl-2', 2''-dimethylphenolphthalein | 3, 3-bis[4-hydroxy-2-methyl-5-(propan-2-yl)phenyl]-2-benzof
Specifications & Purity
90% (v/v) ethanol containing 0.05% (w/v)
Biochemical and Physiological Mechanisms
Acid-base pH indicator. The transition range is around pH 9.3–10.5. Below this pH, it is colorless; above, it is blue. Acidic form retains hydrogen on each hydroxyl group.
Storage
Room temperature
Shipped In
Normal
Note
Wherever possible, you should prepare and use solutions on the same day. However, if you need to make up stock solutions in advance, we recommend that you store the solution as aliquots in tightly sealed vials at -20°C. Generally, these will be useable for up to one month. Before use, and prior to opening the vial we recommend that you allow your product to equilibrate to room temperature for at least 1 hour. Need more advice on solubility, usage and handling? Please visit our frequently asked questions (FAQ) page for more details.
Names and Identifiers
Isomeric SMILES CC1=CC(=C(C=C1C2(C3=CC=CC=C3C(=O)O2)C4=CC(=C(C=C4C)O)C(C)C)C(C)C)O
WGK Germany 3
PubChem CID 31316
Molecular Weight 430.54
Beilstein 359413
Reaxy-Rn 359413

Documentation

📋 Safety Data Sheet (SDS)

Comprehensive hazard, handling, storage, and regulatory compliance document.

Download SDS →

✅ Certificate of Analysis (COA)

Lot-specific quality data. Enter your lot number to retrieve the exact COA.

Look up COA →

📊 Datasheet

Quick-reference summary of product specifications and applications.

View datasheet →

🔬 Specification Sheet

Full quality attributes and acceptance criteria for this grade.

View spec sheet →

Advanced Data

Associated Targets(Human)
CYP2C9 Tchem Cytochrome P450 2C9 (1 Activities)
Activity TypeActivity Value -log(M)Mechanism of ActionActivity ReferencePublications (PubMed IDs)
Certificates(CoA,COO,BSE/TSE and Analysis Chart)
C of A & Other Certificates(BSE/TSE, COO):
Analytical Chart:

Find and download the COA for your product by matching the lot number on the packaging.

2 results found

Lot NumberCertificate TypeDateItem
L2326249Certificate of AnalysisJan 04, 2024 T196524
L2326250Certificate of AnalysisDec 27, 2023 T196524
Chemical and Physical Properties
Melt Point(°C)251-253°C
Documents & Articles
Citations of This Product
References
1. Xingyan Liu, Jinfeng Zhao, Jie Hao, Ying Zhang, Weiyi Cui, Dawei Lou, Xiyue Wang.  (2025)  Preparation of TP-PA-coated needle trap device for determination of polychlorinated biphenyls in milk combined with gas chromatography.  JOURNAL OF FOOD COMPOSITION AND ANALYSIS,      [PMID:] [10.1016/j.jfca.2025.108325]
2. Yao An, Zhaoxiang Yang, Yongjia Yang, Xinlei Li, Xinjia Zheng, Zhiwu Chen, Xun Wu, Beihang Xu, Yapei Wang, Yonglin He.  (2023)  Stretchable, Programmable and Magnet-Insensitive Protonic Display Based on Integrated Ionic Circuit.  Small,  20  (11): (2308875).  [PMID:37880900] [10.1002/smll.202308875]
3. Jing Zhang, Xingjie Shang, Ying Zhu, Xuan Yang, Shu Wang, Feixiang Gong, Lei Wang, Hongpeng Ma.  (2023)  Pyrrolidinium-functionalized Cardo (TPM) poly(arylene ether sulfone)s membranes for acid recovery: The effects of Cardo (TPM) microstructures.  JOURNAL OF MEMBRANE SCIENCE,      [PMID:] [10.1016/j.memsci.2023.122205]
4. Yujie Zhu, Xinhong Zheng, Qiaoling Zeng, Rongbin Zhong, Yujing Guo, Feifei Shi, Peng Liang.  (2023)  The inhibitory effect of large yellow croaker roe phospholipid as a potential antioxidant on fish oil oxidation stability.  Food Bioscience,      [PMID:] [10.1016/j.fbio.2023.103291]
5. Yongwu He, Mo Chen, Jing Wang, Gaomei Zhao, Songling Han, Yang Xu, Yin Chen, Cheng Wang, Junping Wang.  (2023)  A Comprehensive Chemistry Experiment for Undergraduates to Investigate the Photodegradation of Organic Dyes by ZnO/GO Nanocomposite.  JOURNAL OF CHEMICAL EDUCATION,      [PMID:] [10.1021/acs.jchemed.3c00172]
6. Beibei Yang, Fei Chen, Yi Wang, Ting Deng, Xinxin Feng, Jishan Li.  (2022)  Colorimetric nano-beacon and magnetic separation-based rapid and visual assay for gram-negative bacteria.  ANALYTICAL BIOCHEMISTRY,      [PMID:35944695] [10.1016/j.ab.2022.114824]
7. Rui Duan, Chao Peng, Lu Sun, Lu-Xia Zhang, Chen-Chen Bai, Lin-Yi Dong, Xian-Hua Wang.  (2020)  Integrating boronate affinity controllable-oriented surface imprinting nylon wire and pH-triggered allochroic-graphene oxide for ultrasensitive detection of glycoprotein.  SENSORS AND ACTUATORS B-CHEMICAL,      [PMID:] [10.1016/j.snb.2020.129310]
8. Haoyu Long, Yuanyi Deng, Yuefei Zhang, Sheng Tang, Wei Chen.  (2024)  A facile creation of hydrophilic-lipophilic-balanced covalent organic frameworks with mixed-mode retention mechanisms for multiple applications in liquid chromatography.  MICROCHEMICAL JOURNAL,      [PMID:] [10.1016/j.microc.2024.109900]
9. Lin Wang, Haojie Xie, Tianci Zhou, Minghui Wang, Jie Yang, Tao Gao, Genxi Li.  (2024)  Assembly of Dye Molecules in Covalent Organic Frameworks for Enhanced Colorimetric Biosensing.  ANALYTICAL CHEMISTRY,      [PMID:39283703] [10.1021/acs.analchem.4c03365]
10. Haowen Jiang, Zuxue Mo, Xuerui Xie, Yilong Wu, Xiangyong Xue.  (2024)  Bio-Inspired Self-Healing Silicon Anodes: Harnessing Tea Polyphenols to Enhance Lithium-Ion Battery Performance.  ACS Applied Materials & Interfaces,      [PMID:39417557] [10.1021/acsami.4c12880]
11. Ke Yuan, Tao Zhang, Li Lv, Yan Wang, Zongpeng Zou, Shengwei Tang.  (2024)  Intensification Mechanism of Acidic Imidazole-Based Ionic Liquids on the Synthesis of 1,3,5-Trioxane Catalyzed by Sulfuric Acid.  INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH,      [PMID:] [10.1021/acs.iecr.4c01576]
12. Zhenzhen Wu, Lin Wang, Zhiwen Hu, Xiuqing Guan, Yibin Chen, Mingming Xu, Xianrui Chen, Nitong Bu, Jie Duan, Wei Liu, Chen Ma, Jie Pang.  (2025)  Konjac glucomannan/zein active film loaded with tea polyphenol–ferric nanoparticles for strawberry preservation.  INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES,      [PMID:39837445] [10.1016/j.ijbiomac.2025.139905]
13. Yuyang Liu, Shiyin Zhao, Yujiao Li, Jian Huang, Xuheng Yang, Jianfang Wang, Cheng-an Tao.  (2024)  Mechanically Enhanced Detoxification of Chemical Warfare Agent Simulants by a Two-Dimensional Piezoresponsive Metal–Organic Framework.  Nanomaterials,  14  (7): (559).  [PMID:38607094] [10.3390/nano14070559]
14. Rongyu Xu, Tong Zhou, Mengyao Tian, Haoran Li, Shen Xu, Yuchen Yang, Yaru Zhang, Jinming Ma, Tifeng Jiao.  (2024)  Non-noble nickel-modified covalent organic framework for photocatalytic hydrogen production.  COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS,      [PMID:] [10.1016/j.colsurfa.2024.135792]
15. Cuilian Yi, Chunyan Xu, Xiaoyan Zhao, Chenyi Wang, Hengxue Xiang.  (2024)  Synthesis of the fluorescent polymer containing pyrene and its application in the detection of tea polyphenol.  POLYMER ENGINEERING AND SCIENCE,      [PMID:] [10.1002/pen.27052]
16. Lina Ba, Mingyao E, Ruixuan Wang, Nan Wu, Rui Wang, Renling Liu, Xiang Feng, Hanping Qi, Hongli Sun, Guofen Qiao.  (2024)  Triptolide attenuates cardiac remodeling by inhibiting pyroptosis and EndMT via modulating USP14/Keap1/Nrf2 pathway.  Heliyon,      [PMID:38293551] [10.1016/j.heliyon.2024.e24010]
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