Molekula
Esculin Sesquihydrate
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
Esculin Sesquihydrate is a natural glycoside derived from the bark of horse chestnut (Aesculus hippocastanum), commonly used in microbiology for selective and differential media to detect beta-glucosidase activity in bacteria, particularly in the identification of Enterococcus species. It appears as a white to off-white crystalline powder, soluble in water and ethanol. This chemical has a CAS number of 66778-17-4, a molecular formula of C15H16O9 · 1.5H2O, and a molecular weight of 367.31 g/mol. It is stable under ambient storage conditions with no signal word for hazard classification. Molekula supplies Esculin Sesquihydrate 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.
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.
Need a different size? Add the nearest pack and change the size in your basket — we price it at the same rate per unit.
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5 g — £38.70 per pack ex VAT · £46.44 inc. VAT
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25 g — £105.80 per pack ex VAT · £126.96 inc. VAT
Need a different quantity or pack?
Tell us how much you need and when — drums, IBCs, sacks or a one-off bulk lot. We'll manufacture or source it and come back with a price.
Prices exclude VAT/sales tax and shipping.
Specifications
| Property | Value |
|---|---|
| Appearance | White crystalline powder |
| Water | 6.5-8.5% |
| Heavy metals | ≤20ppm |
| Salmonella | Not detected |
| Odour | Odourless |
| Solubility | Easily soluble in water at 100°C, very slightly soluble in water at 15°C and soluble in ethanol at 750 g/l |
| Assay (HPLC) | 98.0-102.5% |
| Specific optical rotation | -87.0° - -84.0° |
| Clarity | Clear in a 2% solution |
| Residual Solvents: Methanol | ≤3000ppm |
| Residual Solvents: Ethanol | ≤5000ppm |
| Identification (TLC) | Conforms to reference |
| E. Coli | Not detected |
| Mould & Yeast | ≤100 cfu/g |
| Microbial count | ≤1000 cfu/g |
| Enterobacteriaceae | ≤100 cfu/g |
| Residual Solvents: Chloroform | ≤60ppm |
| Aesculitin, Abs | ≤0.05 |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | Ambient |
| Transport Class | Not regulated as dangerous goods. |
| Packing Group | Not regulated as dangerous goods. |
| Acidity | Neutral |
Identification
| Property | Value |
|---|---|
| SKU | 18702050 |
| CAS Number | 66778-17-4 |
| IUPAC Name | bis(7-hydroxy-6-[(2S,3R,4S,5S,6R)-3,4,5-trihydroxy-6-(hydroxymethyl)oxan-2-yl]oxychromen-2-one);trihydrate |
| EC Number | 686-183-3 |
| Molecular Formula | C15H16O9 · 1.5H2O |
| Molecular Weight | 367.31 |
| Exact Mass | 734.1906 |
| SMILES | C1=CC(=O)OC2=CC(=C(C=C21)O[C@H]3[C@@H]([C@H]([C@@H]([C@H](O3)CO)O)O)O)O.C1=CC(=O)OC2=CC(=C(C=C21)O[C@H]3[C@@H]([C@H]([C@@H]([C@H](O3)CO)O)O)O)O.O.O.O |
| InChIKey | LGMHQDJZWHRZPO-HPPUHPNBSA-N |
| InChI | InChI=1S/2C15H16O9.3H2O/c2*16-5-10-12(19)13(20)14(21)15(24-10)23-9-3-6-1-2-11(18)22-8(6)4-7(9)17;;;/h2*1-4,10,12-17,19-21H,5H2;3*1H2/t2*10-,12-,13+,14-,15-;;;/m11.../s1 |
| PubChem CID | 131675424 |
| REACH Code | Y110 |
| HTS Code | 2938.90.0000 |
| Tariff Code | 2938909090 |
Safety & GHS
Precautionary statements
- P280 Wear protective gloves/protective clothing/eye protection/face protection
Documents
Safety Data Sheets (SDS)
Available in English, German, Spanish, French, Italian, Portuguese, Arabic, Dutch.
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
- 2H-1-BENZOPYRAN-2-ONE, 6-(.BETA.-D-GLUCOPYRANOSYLOXY)-7-HYDROXY-, HYDRATE (2:3)
- 2H-1-Benzopyran-2-one, 6-(b-D-glucopyranosyloxy)-7-hydroxy-, hydrate(2:3)
- 6,7-Dihydroxycoumarin 6-glucoside sesquihydrate
- Esculin hydrate(2:3)
Frequently asked questions
What is Esculin Sesquihydrate used for?
Esculin Sesquihydrate is primarily used in microbiology for detecting group D streptococci, such as Streptococcus bovis/gallolyticus, and Enterococcus species in culture media like Bile Esculin Agar.
What is the chemical formula and molecular weight of Esculin Sesquihydrate?
The formula is C₁₅H₁₆O₉·1.5H₂O, with a molecular weight of 367.31 g/mol.
How should Esculin Sesquihydrate be stored?
Store at ambient temperature in a cool, dry place, away from direct sunlight and moisture.
What grade of Esculin Sesquihydrate does Molekula supply?
Molekula supplies pharmaceutical/analytical grade Esculin Sesquihydrate, suitable for microbiological testing and research applications.
Can Molekula supply Esculin Sesquihydrate in bulk quantities?
Yes, bulk quantities are available upon request—please contact our sales team for pricing and minimum order quantities.
What documentation comes with an order of Esculin Sesquihydrate?
Each order includes a Certificate of Analysis (CoA), Material Safety Data Sheet (MSDS), and a batch-specific quality report for traceability.
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.