Molekula
Clarithromycin
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
Clarithromycin is a semi-synthetic macrolide antibiotic used to treat bacterial infections, including respiratory tract and skin infections. It works by inhibiting bacterial protein synthesis. Available with CAS number 81103-11-9, molecular formula C38H69NO13, and molecular weight 747.95 g/mol. Store at -15 to -20 °C. Signal word: Warning. Molekula supplies Clarithromycin 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.
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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1 g — £61.50 per pack ex VAT · £73.80 inc. VAT
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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 | ≤ 2.0% |
| Heavy metals | ≤ 20ppm |
| pH | 7.0 - 10.0 |
| Assay | 96.0 - 102.0% |
| Ethanol | ≤ 0.5% |
| Dichloromethane | ≤ 0.06% |
| Residue on Ignition | ≤ 0.3% |
| Specific optical rotation | -94 to -102° |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | -15 to -20 °C |
| Flash Point | 87 °C |
| Acidity | Base |
For research use only. Not for human use.
Literature values
Published physical properties of the substance, not batch specifications.
| Property | Value |
|---|---|
| Melting Point | 217-220 °C (decomposes) ... Also reported as mp 222-225 °C |
| pKa | pKa = 8.99 (at 25 °C) |
| log P (octanol/water) | 3.16 |
Source: PubChem CID 84029 (HSDB, DrugBank)
Identification
| Property | Value |
|---|---|
| SKU | 37077446 |
| CAS Number | 81103-11-9 |
| IUPAC Name | (3R,4S,5S,6R,7R,9R,11R,12R,13S,14R)-6-[(2S,3R,4S,6R)-4-(dimethylamino)-3-hydroxy-6-methyloxan-2-yl]oxy-14-ethyl-12,13-dihydroxy-4-[(2R,4R,5S,6S)-5-hydroxy-4-methoxy-4,6-dimethyloxan-2-yl]oxy-7-methoxy-3,5,7,9,11,13-hexamethyl-oxacyclotetradecane-2,10-dione |
| Molecular Formula | C38H69NO13 |
| Molecular Weight | 747.95 |
| Exact Mass | 747.4769 |
| SMILES | CC[C@@H]1[C@@]([C@@H]([C@H](C(=O)[C@@H](C[C@@]([C@@H]([C@H]([C@@H]([C@H](C(=O)O1)C)O[C@H]2C[C@@]([C@H]([C@@H](O2)C)O)(C)OC)C)O[C@H]3[C@@H]([C@H](C[C@H](O3)C)N(C)C)O)(C)OC)C)C)O)(C)O |
| InChIKey | AGOYDEPGAOXOCK-KCBOHYOISA-N |
| InChI | InChI=1S/C38H69NO13/c1-15-26-38(10,45)31(42)21(4)28(40)19(2)17-37(9,47-14)33(52-35-29(41)25(39(11)12)16-20(3)48-35)22(5)30(23(6)34(44)50-26)51-27-18-36(8,46-13)32(43)24(7)49-27/h19-27,29-33,35,41-43,45H,15-18H2,1-14H3/t19-,20-,21+,22+,23-,24+,25+,26-,27+,29-,30+,31-,32+,33-,35+,36-,37-,38-/m1/s1 |
| PubChem CID | 84029 |
| REACH Code | Y110 |
| HTS Code | 29419010 |
| Tariff Code | 2941900000 |
Safety & GHS
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Health Hazard
GHS07
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Serious Health Hazard
GHS08
Hazard statements
- H302 Harmful if swallowed
- H351 Suspected of causing cancer
- H361 Suspected of damaging fertility or the unborn child
- H412 Harmful to aquatic life with long lasting effects
Precautionary statements
- P260 Do not breathe dust/fume/gas/mist/vapours/spray
- P273 Avoid release to the environment
- 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
- P308+313 IF exposed or concerned: Get medical advice/attention
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
- 6-O-Methylerythromycin
- 6-O-Methylerythromycin a
- Abbott-56268
- Biaxin
- Clarithromycine
- Erythromycin, 6-O-methyl-
- Klacid
- Klaricid
- Macladin
- Veclam
Frequently asked questions
What is Clarithromycin used for?
Clarithromycin is a macrolide antibiotic used to treat bacterial infections such as respiratory tract infections, skin infections, and Helicobacter pylori infections.
What is the chemical formula and molecular weight of Clarithromycin?
The chemical formula is C38H69NO13 and the molecular weight is 747.95 g/mol.
How should Clarithromycin be stored?
Clarithromycin should be stored at temperatures between -15 and -20 °C to maintain stability.
What grade of Clarithromycin does Molekula supply?
Molekula supplies Clarithromycin in research-grade quality suitable for laboratory use.
Can Molekula supply Clarithromycin in bulk?
Yes, Molekula can supply Clarithromycin in bulk quantities—please contact our sales team for pricing and availability.
What documentation comes with a Clarithromycin order?
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.