Molekula
Erythromycin
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
Erythromycin is a macrolide antibiotic used to treat bacterial infections, including respiratory, skin, and soft tissue infections. It works by inhibiting bacterial protein synthesis. This chemical has the CAS number 114-07-8, a molecular formula of C37H67NO13, and a molecular weight of 733.93. It is stored at ambient temperature and carries no signal word for hazard classification. Molekula supplies Erythromycin 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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5 g — £41.20 per pack ex VAT · £49.44 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 |
| Water | 10% max |
| Specific rotation | -71 ° to -78 ° |
| Identification | IR absorption spectrum comparison with USP RS |
| Ethanol | 0.5% max |
| Residue on Ignition | 0.2% max |
| Crystallinity | Meets the requirements |
| Assay (Anhydrous) | 85.0% - 100.5% |
| Erythromycin B | 12.0% max |
| Erythromycin C | 5.0% max |
| Limit of thiocyanate | 0.3% max |
| Propanol | 0.5% max |
| N-butylacetate | 0.5% max |
| Erythromycin A enol ether | 0.3% max |
| Any individual related substastances | 3.0% max |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | Ambient |
| Acidity | Acid |
Literature values
Published physical properties of the substance, not batch specifications.
| Property | Value |
|---|---|
| Appearance | White or slightly yellow crystals or powder |
| Odour | Odorless |
| Melting Point | 191 °C |
| Solubility (other solvents) | FREELY SOLUBLE IN ALC, SOL IN POLYETHYLENE GLYCOL /Erythromycin ethyl succinate |
| Refractive Index | 1.490 |
| pKa | pKa = 8.88 |
| log P (octanol/water) | 3.06 |
Source: PubChem CID 12560 (HSDB, DrugBank)
Identification
| Property | Value |
|---|---|
| SKU | 28466420 |
| CAS Number | 114-07-8 |
| 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-7,12,13-trihydroxy-4-[(2R,4R,5S,6S)-5-hydroxy-4-methoxy-4,6-dimethyloxan-2-yl]oxy-3,5,7,9,11,13-hexamethyl-oxacyclotetradecane-2,10-dione |
| EC Number | 204-040-1 |
| Molecular Formula | C37H67NO13 |
| Molecular Weight | 733.93 |
| Exact Mass | 733.4612 |
| 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)O)C)C)O)(C)O |
| InChIKey | ULGZDMOVFRHVEP-RWJQBGPGSA-N |
| InChI | InChI=1S/C37H67NO13/c1-14-25-37(10,45)30(41)20(4)27(39)18(2)16-35(8,44)32(51-34-28(40)24(38(11)12)15-19(3)47-34)21(5)29(22(6)33(43)49-25)50-26-17-36(9,46-13)31(42)23(7)48-26/h18-26,28-32,34,40-42,44-45H,14-17H2,1-13H3/t18-,19-,20+,21+,22-,23+,24+,25-,26+,28-,29+,30-,31+,32-,34+,35-,36-,37-/m1/s1 |
| PubChem CID | 12560 |
| REACH Code | Y110 |
| HTS Code | 2941500000 |
| Tariff Code | 2941500000 |
Safety & GHS
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Health Hazard
GHS07
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Hazardous to the Environment
GHS09
Hazard statements
- H319 Causes serious eye irritation
- H400 Very toxic to aquatic life
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
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
- Abomacetin
- E-Mycin
- Emgel
- Eritromicina
- Erymax
- Erythromycin A
- Erythromycine
- Erythromycinum
- Ilotycin
- Robimycin
Frequently asked questions
What is erythromycin commonly used for?
Erythromycin is primarily used as an antibiotic to treat bacterial infections, including respiratory tract infections, skin infections, and sexually transmitted diseases like chlamydia.
What is the chemical formula and molecular weight of erythromycin?
The chemical formula is **C₃₇H₆₇NO₁₃**, and the molecular weight is **733.93 g/mol**.
How should erythromycin be stored?
Store erythromycin at **ambient temperature** in a dry, well-ventilated area, protected from excessive heat and moisture.
What grades or purity levels of erythromycin does Molekula supply?
Molekula supplies **pharmaceutical-grade (USP/EP/BP compliant) erythromycin** for research, development, and industrial applications.
Can Molekula supply erythromycin in bulk quantities?
Yes, Molekula can provide erythromycin in **bulk quantities**, with flexible packaging options (e.g., drums, bags) based on customer requirements.
What documentation is provided with an erythromycin order?
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.