Molekula
Omeprazole
Supplying 4,500+ customers in over 80 countries
ISO 9001:2015 & ISO 14001:2015 certified · Supplying laboratories and industry since 1999 · Listed pack sizes are a starting point — we manufacture, source and repack to the quantity you need
Omeprazole is a proton pump inhibitor used to treat conditions such as gastroesophageal reflux disease (GERD), peptic ulcers, and Zollinger-Ellison syndrome by reducing stomach acid production. It is available as a white to off-white powder with a CAS number of 73590-58-6, molecular formula C17H19N3O3S, and molecular weight of 345.42 g/mol. Store at 2 to 8 °C. Signal word: Warning.
Molekula supplies Omeprazole at 98.0% - 102.0% purity (HPLC) in 5 g packs, from £35.40 inc. VAT. It is in stock for same-day dispatch. Every batch ships with a certificate of analysis, and safety data sheets are available in 7 languages. Larger quantities, up to multi-tonne, are quoted on request.
Example image for illustration only. Other packaging and pack sizes are available.
Pricing & pack sizes
In stock — same-day dispatch
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 — £29.50 per pack ex VAT · £35.40 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 | A white or almost white powder |
| Heavy metals | ≤0.002% |
| Loss on Drying | ≤0.5% |
| Specification | USP 39 |
| Assay (HPLC) | 98.0% - 102.0% |
| Residue on Ignition | ≤0.1% |
| Total Impurities | ≤1.0% |
| Absorbance | Not greater than 0.10 at 440nm (≤350ppm) |
| Residual Solvents: Methanol | ≤1000ppm |
| Any other individual impurity | ≤0.10% |
| Residual Solvents: Acetone | ≤1500ppm |
| Residual Solvents: Benzene | ≤1ppm |
| Residual Solvents: Toluene | ≤ 300ppm |
| 5-Methoxy-1H-benzimidazol-2-thiol | ≤0.15% |
| Omeprazole N-oxide | ≤0.15% |
| Omeprazole sulfone N-oxide | ≤0.15% |
| Desmethoxy omeprazole | ≤0.15% |
| Omeprazole sulfone | ≤0.15% |
| Omeprazole 4-chloroanalog | ≤0.15% |
| Ufiprazole | ≤0.15% |
| Residual solvents: Methylene chloride | ≤ 100ppm |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | 2 to 8 °C |
| Transport Class | 9 |
| Packing Group | III |
| Acidity | Acid |
Literature values
Published physical properties of the substance, not batch specifications.
| Property | Value |
|---|---|
| Appearance | White to off-white crystalline powder |
| Melting Point | 155 °C |
| Boiling Point | 599.99 °C at 760 mmHg |
| Vapour Pressure | 9.2 × 10⁻¹³ mmHg at 25 °C (Estimated) |
| pKa | pKa1 = 1.2 |
| log P (octanol/water) | 2.23 |
Source: PubChem CID 4594 (HSDB, DrugBank)
Identification
| Property | Value |
|---|---|
| SKU | 86694532 |
| CAS Number | 73590-58-6 |
| IUPAC Name | 6-methoxy-2-[(4-methoxy-3,5-dimethyl-2-pyridinyl)methylsulfinyl]-1H-benzimidazole |
| Molecular Formula | C17H19N3O3S |
| Molecular Weight | 345.42 |
| Exact Mass | 345.1147 |
| SMILES | CC1=CN=C(C(=C1OC)C)CS(=O)C2=NC3=C(N2)C=C(C=C3)OC |
| InChIKey | SUBDBMMJDZJVOS-UHFFFAOYSA-N |
| InChI | InChI=1S/C17H19N3O3S/c1-10-8-18-15(11(2)16(10)23-4)9-24(21)17-19-13-6-5-12(22-3)7-14(13)20-17/h5-8H,9H2,1-4H3,(H,19,20) |
| PubChem CID | 4594 |
| UN Number | UN3077 |
| REACH Code | Y110 |
| HTS Code | 29333941 |
| Tariff Code | 2933399990 |
Safety & GHS
-
Health Hazard
GHS07
-
Hazardous to the Environment
GHS09
Hazard statements
- H302 Harmful if swallowed
- H315 Causes skin irritation
- H317 May cause an allergic skin reaction
- H319 Causes serious eye irritation
- H335 May cause respiratory irritation
- H411 Toxic to aquatic life with long lasting effects
Precautionary statements
- P261 Avoid breathing dust/fume/gas/mist/vapours/spray
- P273 Avoid release to the environment
- P280 Wear protective gloves/protective clothing/eye protection/face protection
- P302+352 IF ON SKIN: Wash with soap and water
- P305+351+338 IF IN EYES: Rinse with water for several minutes. Remove contact lenses if present and easy to do. Continue rinsing
- P501 Dispose of contents/container to an approved waste disposal plant
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.
Quality certificates
Molekula Group is certified to ISO 9001:2015 (quality) and ISO 14001:2015 (environmental management), audited by a UKAS-accredited body. Both certificates are valid to 17 May 2028.
Synonyms
- Antra
- Audazol
- Losec
- Mopral
- Omapren
- Omepral
- Omeprazon
- Omeprol
- Omizac
- Sanamidol
Frequently asked questions
What is omeprazole used for?
Omeprazole is a proton pump inhibitor used to treat conditions such as gastroesophageal reflux disease (GERD), peptic ulcers, and Zollinger-Ellison syndrome by reducing stomach acid production.
What is the chemical formula and molecular weight of omeprazole?
The chemical formula of omeprazole is C17H19N3O3S, and its molecular weight is 345.42 g/mol.
How should omeprazole be stored?
Omeprazole should be stored at temperatures between 2 to 8 °C, protected from light and moisture.
What grade of omeprazole does Molekula supply?
Molekula supplies omeprazole to the USP 39 specification, with an assay by HPLC of 98.0% to 102.0%.
Can Molekula supply omeprazole in bulk quantities?
Yes, Molekula can supply omeprazole in bulk quantities—please contact our sales team for pricing and availability.
What documentation comes with an omeprazole order?
Each order includes a Certificate of Analysis (CoA) and safety data sheet (SDS); additional documentation can be provided upon request.
Where can I buy Omeprazole?
Directly from Molekula, which lists Omeprazole in 5 g packs from £35.40 inc. VAT, with a certificate of analysis for every batch. Larger quantities are quoted on request. Molekula's offices: United Kingdom, France, Spain, Germany, Italy, United States and China.
Is Omeprazole dangerous goods for shipping?
Yes. Omeprazole ships as dangerous goods: UN3077, class 9, packing group III.
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.