Molekula
Thymolphthalein
Thymolphthalein is a pH indicator commonly used in acid-base titrations and in the detection of alkaline substances. It appears as a white to pale yellow crystalline powder and turns blue in basic solutions. Available in powder form with a molecular weight of 430.54 g/mol, its CAS number is 125-20-2, and it is stable at ambient storage conditions. Molekula supplies Thymolphthalein from research to bulk quantities with full documentation and ISO 9001:2015 traceability.
Overview
Thymolphthalein is a pH indicator commonly used in acid-base titrations and in the detection of alkaline substances. It appears as a white to pale yellow crystalline powder and turns blue in basic solutions. Available in powder form with a molecular weight of 430.54 g/mol, its CAS number is 125-20-2, and it is stable at ambient storage conditions. Molekula supplies Thymolphthalein from research to bulk quantities with full documentation and ISO 9001:2015 traceability.
Pricing & pack sizes
Specifications
| Property | Value |
|---|---|
| Appearance | White powder |
| Loss on Drying | <1.0% |
| Wavelenght of max absorption | 592 - 596nm (0.1N NaOH) |
| Absorptivity 1%,1cm | >1000 |
| Solubility (0.1% ethanol) | Clear solution |
| Transistion Range Ph 9.3 10.5 | From Colourless to Blue |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | Ambient |
| Shelf Life | 24 months |
| Acidity | Neutral |
Identification
| Property | Value |
|---|---|
| SKU | 40922033 |
| CAS Number | 125-20-2 |
| Molecular Formula | C28H30O4 |
| Molecular Weight | 430.54 |
| SMILES | O=C1OC(C=2C=CC=CC12)(C3=CC(=C(O)C=C3C)C(C)C)C4=CC(=C(O)C=C4C)C(C)C |
| REACH Code | Y113 |
| TSCA Listed | Yes |
| HTS Code | 29322050 |
| Tariff Code | 2932209090 |
Safety & GHS
Precautionary statements
- P280 Wear protective gloves/protective clothing/eye protection/face protection
For research and industrial use only
Documents
Safety Data Sheets (SDS)
Available in PT, US, IT, FR, ES, DE, EN.
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PT - (40922033) THYMOLPHTHALEIN [125-20-2].pdf
SDS · PT · 155 KB
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US - (40922033) THYMOLPHTHALEIN [125-20-2].pdf
SDS · US · 152 KB
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IT - (40922033) THYMOLPHTHALEIN [125-20-2].pdf
SDS · IT · 153 KB
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FR - (40922033) THYMOLPHTHALEIN [125-20-2].pdf
SDS · FR · 155 KB
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ES - (40922033) THYMOLPHTHALEIN [125-20-2].pdf
SDS · ES · 155 KB
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DE - (40922033) THYMOLPHTHALEIN [125-20-2].pdf
SDS · DE · 156 KB
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EN - (40922033) THYMOLPHTHALEIN [125-20-2].pdf
SDS · EN · 152 KB
Certificate of Analysis (CoA) by batch
Enter a lot or batch number to retrieve the CoA for that specific batch. We can generate one from spec data if no PDF is on file.
Synonyms
No alternate names recorded for this product.
Frequently asked questions
What is thymolphthalein used for?
Thymolphthalein is primarily used as a pH indicator in laboratory settings, turning blue in basic solutions (pH 9.3–10.5).
What is the chemical formula and molecular weight of thymolphthalein?
The chemical formula is C28H30O4, and the molecular weight is 430.54 g/mol.
How should thymolphthalein be stored?
Thymolphthalein should be stored at ambient temperature, protected from light and moisture.
What grade of thymolphthalein does Molekula supply?
Molekula supplies thymolphthalein in analytical grade.
Can Molekula supply thymolphthalein in bulk?
Yes, Molekula can supply thymolphthalein in bulk quantities—please contact sales for details.
What documentation comes with a thymolphthalein order?
Each order includes a Certificate of Analysis (CoA) and safety data sheet (SDS) upon request.
Ready to order or need a custom pack?
Tell us the product, grade, and quantity — Molekula usually responds within one working day with pricing and lead time.