Molekula
Leupeptin hemisulfate
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
Leupeptin hemisulfate is a serine protease inhibitor widely used in biochemical research to study protein degradation pathways and as a cell-permeable reagent in enzyme activity assays. This synthetic peptide analog effectively inhibits cysteine and serine proteases like trypsin, papain, and calpain. Leupeptin hemisulfate has a CAS number of 103476-89-7, with the molecular formula C20H38N6O4 · 0.5H2O4S and a molecular weight of 475.59. Store at -15 to -20°C for stability. The product carries a **Warning** signal word for safety handling. Molekula supplies Leupeptin hemisulfate 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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25 mg — £130.50 per pack ex VAT · £156.60 inc. VAT
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100 mg — £331.90 per pack ex VAT · £398.28 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 |
| Assay | >96.5% |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | -15 to -20 °C |
| Acidity | Neutral |
Identification
| Property | Value |
|---|---|
| SKU | 35875057 |
| CAS Number | 103476-89-7 |
| IUPAC Name | bis((2S)-2-acetamido-N-[(2S)-1-[[(2S)-5-(diaminomethylideneamino)-1-oxopentan-2-yl]amino]-4-methyl-1-oxopentan-2-yl]-4-methylpentanamide);sulfuric acid |
| Molecular Formula | C20H38N6O4 · 0.5H2O4S |
| Molecular Weight | 475.59 |
| Exact Mass | 950.5583 |
| SMILES | CC(C)C[C@@H](C(=O)N[C@@H](CC(C)C)C(=O)N[C@@H](CCCN=C(N)N)C=O)NC(=O)C.CC(C)C[C@@H](C(=O)N[C@@H](CC(C)C)C(=O)N[C@@H](CCCN=C(N)N)C=O)NC(=O)C.OS(=O)(=O)O |
| InChIKey | CIPMKIHUGVGQTG-VFFZMTJFSA-N |
| InChI | InChI=1S/2C20H38N6O4.H2O4S/c2*1-12(2)9-16(24-14(5)28)19(30)26-17(10-13(3)4)18(29)25-15(11-27)7-6-8-23-20(21)22;1-5(2,3)4/h2*11-13,15-17H,6-10H2,1-5H3,(H,24,28)(H,25,29)(H,26,30)(H4,21,22,23);(H2,1,2,3,4)/t2*15-,16-,17-;/m00./s1 |
| PubChem CID | 2733491 |
| REACH Code | Y110 |
| HTS Code | 2925.29.9000 |
| Tariff Code | 2925290090 |
Safety & GHS
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Health Hazard
GHS07
Hazard statements
- H302 + H312 + H332 Harmful if swallowed, in contact with skin or if inhaled
Precautionary statements
- P261 Avoid breathing dust/fume/gas/mist/vapours/spray
- P264 Wash thoroughly after handling
- P280 Wear protective gloves/protective clothing/eye protection/face protection
- P301+312 IF SWALLOWED: Call a POISON CENTER or doctor/physician if you feel unwell
- P302+352 IF ON SKIN: Wash with soap and water
- P304+340 IF INHALED: Remove victim to fresh air and keep at rest in a position comfortable for breathing
Documents
Safety Data Sheets (SDS)
Available in English, 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
- Acetyl-Leu-Leu-Arg-al 1/2 H2SO4
- CIPMKIHUGVGQTG-VFFZMTJFSA-N
- Leupeptin hemisulfate anhydrous
- Leupeptin hemisulfate salt
- leupeptin sulfate
- Leupeptin, >4000 U/mg
- Leupeptin, Ac-Leu-Leu-argininal x 1/2 H2SO4, synthetic
- Leupetin hemisulfate
Frequently asked questions
What is Leupeptin hemisulfate commonly used for?
Leupeptin hemisulfate is primarily used as a protease inhibitor in biochemical research, particularly for studying protein degradation pathways and preserving protein samples during experiments.
What is the chemical formula and molecular weight of Leupeptin hemisulfate?
The chemical formula is **C20H38N6O4 · 0.5H2O4S**, and the molecular weight is **475.59 g/mol**.
How should Leupeptin hemisulfate be stored?
Store Leupeptin hemisulfate at **-15 to -20°C** to maintain stability and potency.
What grade of Leupeptin hemisulfate does Molekula supply?
Molekula supplies **biochemical research-grade Leupeptin hemisulfate**, suitable for laboratory applications.
Can Molekula supply Leupeptin hemisulfate in bulk quantities?
Yes, Molekula can provide Leupeptin hemisulfate in bulk, with quantities tailored to your research or production needs.
What documentation comes with an order of Leupeptin hemisulfate?
Each order includes a **Certificate of Analysis (CoA)**, **Material Safety Data Sheet (MSDS)**, and **batch-specific documentation** 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.