Molekula
Clarithromycin - USP CRS
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 USP CRS is a macrolide antibiotic reference standard used for pharmaceutical analysis, quality control, and research to ensure drug purity and efficacy. This chemical serves as a benchmark for validating clarithromycin-based formulations in laboratories. The CAS number is 81103-11-9, with a molecular formula of C38H69NO13 and molecular weight of 747.95 g/mol. It must be stored at -15 to -20°C and carries a signal word of Warning. Molekula supplies Clarithromycin USP CRS 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
Pack sizes & pricing
Pricing on request — packs available from research to bulk quantities.
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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 | Undamaged packaging |
| Conforms to USP | Conforms to USP monograph |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | -15 to -20 °C |
| Flash Point | 87 °C |
| Acidity | Base |
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 | 90037460 |
| 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
-
Health Hazard
GHS07
-
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
- Biaxin
- clarithromycin
- Clarithromycine
- Erythromycin, 6-O-methyl-
- Klacid
- Klaricid
- Macladin
- Veclam
Frequently asked questions
What is Clarithromycin USP CRS primarily used for?
Clarithromycin USP CRS (Chemical Reference Substance) is used for analytical reference standards in pharmaceutical quality control, ensuring the accuracy of testing methods for Clarithromycin in drug formulations.
What is the chemical formula and molecular weight of Clarithromycin USP CRS?
The chemical formula is **C₃₈H₆₉NO₁₃**, and the molecular weight is **747.95 g/mol**.
How should Clarithromycin USP CRS be stored?
Store at **-15 to -20°C** to maintain stability and potency.
What grade of Clarithromycin is available from Molekula?
Molekula supplies **USP CRS (Chemical Reference Substance) grade**, meeting strict pharmaceutical standards for analytical accuracy.
Can Molekula supply Clarithromycin USP CRS in bulk quantities?
Yes, Molekula can provide Clarithromycin USP CRS in bulk, tailored to your research or manufacturing needs—contact us for specific quantities.
What documentation comes with a Clarithromycin USP CRS order?
Each order includes a **Certificate of Analysis (CoA)**, **Safety Data Sheet (SDS)**, and **batch-specific documentation** to ensure compliance and 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.