ChemicalBook >> CAS DataBase List >>Thymolphthalein
Thymolphthalein
- CAS No.
- 125-20-2
- Chemical Name:
- Thymolphthalein
- Synonyms
- TP;THYMOLPHTHALEIN INDICATOR;VEGP;Nsc2186;Thymolpthalein;Thymol peptide;THYMOLPHTHALEIN;thymolphtaleine;Thymolphthaiein;DithyMolphthalide
- CBNumber:
- CB5342154
- Molecular Formula:
- C28H30O4
- Molecular Weight:
- 430.54
- MDL Number:
- MFCD00005909
- MOL File:
- 125-20-2.mol
- MSDS File:
- SDS
Last updated:2026-01-13 11:22:13
| Product description | Number | Pack Size | Price |
| Thymolphthalein ACS reagent, indicator (pH 8.8-10.5) | 89360 | 10g | $54 |
| Thymolphthalein ACS reagent, indicator (pH 8.8-10.5) | 89360 | 50g | $165 |
| Thymolphthalein ACS reagent, Dye content 95 % | 114553 | 10g | $41.9 |
| Thymolphthalein ACS reagent, Dye content 95 % | 114553 | 50g | $133 |
| Thymolphthalein indicator ACS,Reag. Ph Eur | 1.08175 | 5G | $102 |
| More product size | |||
| Melting point | 251-253 °C(lit.) |
|---|---|
| Boiling point | 504.79°C (rough estimate) |
| bulk density | 400kg/m3 |
| Density | 0.92 g/mL at 25 °C |
| vapor pressure | 0.002Pa at 90℃ |
| refractive index | 1.6400 (estimate) |
| Flash point | 74 °F |
| storage temp. | no restrictions. |
| solubility | ethanol: clarity passes test |
| pka | 9.70, 10.0(at 25℃) |
| form | Low Melting Mass |
| color | White to slightly yellow |
| Specific Gravity | 0.92 |
| Odor | Mild characteristic odor |
| PH | 8.6～10.5 |
| PH Range | 9.3(colourless)-10.5(blue) |
| explosive limit | 3.30-19% |
| Water Solubility | insoluble |
| λmax | 592nm, 396nm, 598nm |
| Merck | 14,9401 |
| BRN | 359413 |
| Major Application | Display device, semiconductors, recording materials, photoconductors, sol-gel matrix, tin electroplating process, counterfeit-proof paper, authentication system forsecure documents, inks, pencil leads, correction fluid, paints, petroleum marker, tennis ball, adhesives, floor coatings, textiles, detergents, insecticide, lotion, cleaning pads, food storage, determine bacterial growth, Streptococci in saliva, dental impressionmaterials |
| InChI | 1S/C28H30O4/c1-15(2)20-13-23(17(5)11-25(20)29)28(22-10-8-7-9-19(22)27(31)32-28)24-14-21(16(3)4)26(30)12-18(24)6/h7-16,29-30H,1-6H3 |
| InChIKey | GRBHJPCWQRVGND-UHFFFAOYSA-N |
| SMILES | CC(C)c1cc(c(C)cc1O)C2(OC(=O)c3ccccc23)c4cc(C(C)C)c(O)cc4C |
| LogP | 3.682 at 25℃ |
| CAS DataBase Reference | 125-20-2(CAS DataBase Reference) |
| FDA UNII | YG5I28WSQP |
| EPA Substance Registry System | Thymolphthalein (125-20-2) |
| UNSPSC Code | 12171502 |
| NACRES | NB.21 |
SAFETY
Risk and Safety Statements
| Symbol(GHS) |   GHS02,GHS08 |
|||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Signal word | Danger | |||||||||
| Hazard statements | H225-H313-H333-H371 | |||||||||
| Precautionary statements | P210-P260-P280a-P303+P361+P353-P405-P501a | |||||||||
| PPE | Eyeshields, Gloves, type N95 (US) | |||||||||
| Hazard Codes | F,Xn | |||||||||
| Risk Statements | 11-40-10 | |||||||||
| Safety Statements | 7-16-36/37-24/25-22 | |||||||||
| RIDADR | UN 1170 3/PG 3 | |||||||||
| WGK Germany | 3 | |||||||||
| TSCA | TSCA listed | |||||||||
| HazardClass | 3 | |||||||||
| PackingGroup | II | |||||||||
| HS Code | 29322980 | |||||||||
| Storage Class | 11 - Combustible Solids | |||||||||
| NFPA 704 |
|
Thymolphthalein price More Price(39)
| Manufacturer | Product number | Product description | CAS number | Packaging | Price | Updated | Buy |
|---|---|---|---|---|---|---|---|
| Sigma-Aldrich | 89360 | Thymolphthalein ACS reagent, indicator (pH 8.8-10.5) | 125-20-2 | 10g | $54 | 2026-03-19 | Buy |
| Sigma-Aldrich | 89360 | Thymolphthalein ACS reagent, indicator (pH 8.8-10.5) | 125-20-2 | 50g | $165 | 2026-03-19 | Buy |
| Sigma-Aldrich | 114553 | Thymolphthalein ACS reagent, Dye content 95 % | 125-20-2 | 10g | $41.9 | 2026-03-19 | Buy |
| Sigma-Aldrich | 114553 | Thymolphthalein ACS reagent, Dye content 95 % | 125-20-2 | 50g | $133 | 2026-03-19 | Buy |
| Sigma-Aldrich | 1.08175 | Thymolphthalein indicator ACS,Reag. Ph Eur | 125-20-2 | 5G | $102 | 2026-03-19 | Buy |
Thymolphthalein Chemical Properties,Uses,Production
Chemical Properties
white fine crystalline powder
Uses
As pH indicator: colorless 9.3 to blue 10.5. Also as reagent for blood after decolorizing the alkaline solution by boiling with zinc dust.
Uses
Thymolphthalein is a pH sensitive dye that has multiple uses such as testing hydration and/or saliva testing.
Definition
ChEBI: Thymophthalein is a terpene lactone.
General Description
Thymolphthalien is an acid-base indicator which is colourless in acidic form and deep blue in basic form. Acidic form retains hydrogen on each hydroxyl group. It is suitable in preparing disappearing ink.
Synthesis
Made by reacting thymol with phthalic anhydride.
Thymolphthalein Preparation Products And Raw materials
Global( 521)Suppliers
| Supplier | Tel | Country | ProdList | Advantage | |
|---|---|---|---|---|---|
| Shenyang Simchoice Chemical Co.,Ltd | +86-024-23769576 +86-15040101888 | sales@simchoicechem.com | China | 254 | 58 |
| Hebei Chuanghai Biotechnology Co., Ltd | +8615350571055 | Sibel@chuanghaibio.com | China | 8738 | 58 |
| Hebei Chuanghai Biotechnology Co,.LTD | +86-86-13131129325 +8613131129325 | sales1@chuanghaibio.com | China | 5237 | 58 |
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| Hebei Zhuanglai Chemical Trading Co.,Ltd | +8613343047651 | admin@zlchemi.com | China | 3692 | 58 |
| HEBEI SHENGSUAN CHEMICAL INDUSTRY CO.,LTD | +86-15350851019; +8615350851019 | admin@86-ss.com | China | 999 | 58 |
| Henan Tianfu Chemical Co.,Ltd. | +86-0371-55170693 +86-19937530512 | info@tianfuchem.com | China | 21592 | 55 |
| career henan chemical co | +86-0371-86658258 +8613203830695 | sales@coreychem.com | China | 29825 | 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 |
View Lastest Price from Thymolphthalein manufacturers
| Image | Update time | Product | Price | Min. Order | Purity | Supply Ability | Manufacturer | |
|---|---|---|---|---|---|---|---|---|
 |
2026-04-10 | Thymolphthalein
125-20-2
|
US $999.00-666.00 / kg | 1kg | 99% | 5000 | HEBEI SHENGSUAN CHEMICAL INDUSTRY CO.,LTD | |
 |
2026-03-20 | Thymolphthalein
125-20-2
|
US $10.00 / KG | 100KG | 99% | 100 mt | Hebei Chuanghai Biotechnology Co., Ltd | |
 |
2026-03-19 | Thymolphthalein
125-20-2
|
US $132.00 / Kg/Bag | 25Kg/Bag | 98% | 1-10mt | Baoji Guokang Healthchem Co., Ltd. |
-
- Thymolphthalein
125-20-2
- US $999.00-666.00 / kg
- 99%
- HEBEI SHENGSUAN CHEMICAL INDUSTRY CO.,LTD
-
- Thymolphthalein
125-20-2
- US $10.00 / KG
- 99%
- Hebei Chuanghai Biotechnology Co., Ltd
-
- Thymolphthalein
125-20-2
- US $132.00 / Kg/Bag
- 98%
- Baoji Guokang Healthchem Co., Ltd.
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