Molekula
Thymol blue
Supplying 4,500+ customers in over 80 countries
ISO 9001:2015 & ISO 14001:2015 certified · Supplying laboratories and industry since 2000 · Listed pack sizes are a starting point — we manufacture, source and repack to the quantity you need
Thymol blue is a pH indicator used in analytical chemistry to detect acidity and alkalinity, particularly in the pH range of 1.2 to 2.8 and 8.0 to 9.6. It appears as a yellow or red crystalline powder depending on pH. CAS: 76-61-9, Molecular Formula: C27H30O5S, Molecular Weight: 466.59 g/mol, Storage: Ambient, Signal Word: Warning. Molekula supplies Thymol blue from research to bulk quantities with full documentation and ISO 9001:2015 traceability.
Example image for illustration only. Other packaging and pack sizes are available.
Often bought together
Pricing & pack sizes
These pack sizes aren't a limit. Molekula manufactures, sources and repacks to order — if you need 500 kg and only see 1 kg listed, . We quote from grams to multi-tonne.
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25 g — £30.90 per pack ex VAT · £37.08 inc. VAT
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Specifications
| Property | Value |
|---|---|
| Appearance | Dark Brownish Powder |
| Loss on Drying | ≤3% |
| Solubility at 0.1% (95% Ethanol) | Clear solution |
| Wavelength of Max. Absorption | 431 - 436nm |
| Specific Absorbance (E 1%/1cm) | ≥200 |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | Ambient |
| Acidity | Neutral |
Literature values
Published physical properties of the substance, not batch specifications.
| Property | Value |
|---|---|
| Melting Point | 223 °C |
Source: PubChem CID 65565 (PAC Chemical Database)
Identification
| Property | Value |
|---|---|
| SKU | 12900344 |
| CAS Number | 76-61-9 |
| IUPAC Name | 4-[3-(4-hydroxy-2-methyl-5-propan-2-ylphenyl)-1,1-dioxo-2,1lambda6-benzoxathiol-3-yl]-5-methyl-2-propan-2-ylphenol |
| EC Number | 200-973-3 |
| Molecular Formula | C27H30O5S |
| Molecular Weight | 466.59 |
| Exact Mass | 466.1814 |
| SMILES | CC1=CC(=C(C=C1C2(C3=CC=CC=C3S(=O)(=O)O2)C4=CC(=C(C=C4C)O)C(C)C)C(C)C)O |
| InChIKey | PRZSXZWFJHEZBJ-UHFFFAOYSA-N |
| InChI | 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 |
| PubChem CID | 65565 |
| REACH Code | Y110 |
| TSCA Listed | Yes |
| HTS Code | 2934.99.4400 |
| Tariff Code | 2934999090 |
Safety & GHS
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Health Hazard
GHS07
Hazard statements
- H302 Harmful if swallowed
Precautionary statements
- P264 Wash thoroughly after handling
- P280 Wear protective gloves/protective clothing/eye protection/face protection
- P301+330 IF SWALLOWED: Rinse mouth. Do NOT induce vomiting
- P308+313 IF exposed or concerned: Get medical advice/attention
Documents
Safety Data Sheets (SDS)
Available in English, English (US), French, German, Italian, Portuguese, Spanish.
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
- Thym
- Thymol Bleu
- Thymol, 6,6'-(3H-2,1-benzoxathiol-3-ylidene)di-, S,S-dioxide
- Thymolblau
- Thymolsulfonephalein
- Thymolsulfonephthalein
- Thymolsulfonphthalein
- Thymolsulfophthalein
- Thymolsulphonphthalein
- Thymosulfonphthalein
Frequently asked questions
What is thymol blue used for?
Thymol blue is primarily used as a pH indicator in analytical chemistry, particularly in the range of pH 1.2 to 2.8 and 8.0 to 9.6.
What is the chemical formula and molecular weight of thymol blue?
The formula is C27H30O5S with a molecular weight of 466.59 g/mol.
How should thymol blue be stored?
Store at ambient temperature, protected from light and moisture.
What grade of thymol blue does Molekula supply?
Molekula supplies thymol blue in analytical grade.
Can Molekula supply thymol blue in bulk quantities?
Yes, Molekula can supply thymol blue in bulk; please contact sales for volume pricing.
What documentation comes with a thymol blue order?
Each order includes a Certificate of Analysis (CoA) and Safety Data Sheet (SDS).
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.