Molekula
5-Bromo-4-chloro-3-indolyl-alpha-D-galactopyranoside (X-alpha-gal)
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
5-Bromo-4-chloro-3-indolyl-alpha-D-galactopyranoside (X-alpha-gal) is a chromogenic substrate used in enzymatic assays, particularly for detecting alpha-galactosidase activity, such as expression of the MEL1 reporter gene in yeast two-hybrid systems. It is a key reagent in molecular biology and histology applications. CAS: 107021-38-5, Molecular Formula: C14H15BrClNO6, Molecular Weight: 408.63 g/mol. Stored at -15 to -20 °C. Molekula supplies X-alpha-gal 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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100 mg — $58.70 per pack
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250 mg — $165.40 per pack
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 to off-white powder |
| Water | ≤2% |
| Specific optical rotation | +130 to +148 |
| Purity (TLC) | ≥99% |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | -15 to -20 °C |
Identification
| Property | Value |
|---|---|
| SKU | 87527781 |
| CAS Number | 107021-38-5 |
| IUPAC Name | (2R,3R,4S,5R,6R)-2-[(5-bromo-4-chloro-1H-indol-3-yl)oxy]-6-(hydroxymethyl)oxane-3,4,5-triol |
| Molecular Formula | C14H15BrClNO6 |
| Molecular Weight | 408.63 |
| Exact Mass | 406.9771 |
| SMILES | C1=CC(=C(C2=C1NC=C2O[C@@H]3[C@@H]([C@H]([C@H]([C@H](O3)CO)O)O)O)Cl)Br |
| InChIKey | OPIFSICVWOWJMJ-YGEXGZRRSA-N |
| InChI | InChI=1S/C14H15BrClNO6/c15-5-1-2-6-9(10(5)16)7(3-17-6)22-14-13(21)12(20)11(19)8(4-18)23-14/h1-3,8,11-14,17-21H,4H2/t8-,11+,12+,13-,14+/m1/s1 |
| PubChem CID | 10173103 |
| REACH Code | Y110 |
| HTS Code | 29400060 |
| Tariff Code | 2940000080 |
Safety & GHS
Precautionary statements
- P280 Wear protective gloves/protective clothing/eye protection/face protection
Documents
Safety Data Sheets (SDS)
Available in English, French, German, Italian, 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
- 5-Bromo-4-chloro-3-indolyl a-D-galactopyranoside
- 5-Bromo-4-chloro-3-indolyl a-D-glucopyranoside
- 5-Bromo-4-chloro-3-indolyl alpha-D-galactopyranoside
- 5-bromo-4-chloro-3-indolyl alpha-D-galactoside
- 5-bromo-4-chloro-3-indolyl--d-galactopyranoside
- 5-Bromo-4-chloro-3-indoxyl-alpha-D-galactopyranoside
- 5-bromo-4-chloroindoxyl alpha-D-galactoside
- X-?-Gal
- X-| cent-D-Gal
- X-alpha-Gal
Frequently asked questions
What is 5-Bromo-4-chloro-3-indolyl-alpha-D-galactopyranoside (X-alpha-gal) used for?
It is primarily used as a chromogenic substrate for detecting alpha-galactosidase enzyme activity in molecular biology applications, such as detecting MEL1 reporter gene expression in yeast two-hybrid assays.
What is the chemical formula and molecular weight of X-alpha-gal?
The formula is C14H15BrClNO6 with a molecular weight of 408.63 g/mol.
How should X-alpha-gal be stored?
It should be stored at temperatures between -15 and -20 °C to maintain stability and prevent degradation.
What grade is available for X-alpha-gal?
Available in high-purity research grade suitable for laboratory use in enzymatic assays and molecular biology.
Can Molekula supply X-alpha-gal in bulk?
Yes, Molekula can supply X-alpha-gal in bulk quantities; please contact our sales team for pricing and availability.
What documentation comes with an order of X-alpha-gal?
Each order includes a Certificate of Analysis (CoA) and safety data sheet (SDS); additional documentation can be provided 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.