Molekula
Ethynylestradiol
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
Ethynylestradiol is a synthetic estrogen hormone used primarily in birth control pills and hormone replacement therapies to regulate reproductive cycles and treat hormonal imbalances. This potent compound is a key active ingredient in pharmaceutical formulations due to its high efficacy. Ethynylestradiol (CAS 57-63-6) has the molecular formula C20H24O2 and a molecular weight of 296.40 g/mol. It should be stored at ambient conditions and handled with caution, as it carries a **Danger** signal word for toxicity and environmental hazards. Molekula supplies Ethynylestradiol 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.
-
5 g — £140.10 per pack ex VAT · £168.12 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 | Solid |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | Ambient |
| Transport Class | 9 |
| Packing Group | III |
Literature values
Published physical properties of the substance, not batch specifications.
| Property | Value |
|---|---|
| Appearance | Fine, white to creamy white crystalline powder |
| Odour | Odorless |
| Melting Point | 142-146 °C. May also exist in a polymorphic modification with mp 180-186 °C |
| Water Solubility | 11.3 mg/L at 27 °C |
| log P (octanol/water) | 3.67 |
Source: PubChem CID 5991 (HSDB)
Identification
| Property | Value |
|---|---|
| SKU | 68437666 |
| CAS Number | 57-63-6 |
| IUPAC Name | (8R,9S,13S,14S,17R)-17-ethynyl-13-methyl-7,8,9,11,12,14,15,16-octahydro-6H-cyclopenta[a]phenanthrene-3,17-diol |
| EC Number | 200-342-2 |
| Molecular Formula | C20H24O2 |
| Molecular Weight | 296.40 |
| Exact Mass | 296.1776 |
| SMILES | C[C@]12CC[C@H]3[C@H]([C@@H]1CC[C@]2(C#C)O)CCC4=C3C=CC(=C4)O |
| InChIKey | BFPYWIDHMRZLRN-SLHNCBLASA-N |
| InChI | InChI=1S/C20H24O2/c1-3-20(22)11-9-18-17-6-4-13-12-14(21)5-7-15(13)16(17)8-10-19(18,20)2/h1,5,7,12,16-18,21-22H,4,6,8-11H2,2H3/t16-,17-,18+,19+,20+/m1/s1 |
| PubChem CID | 5991 |
| UN Number | UN3077 |
| REACH Code | Y110 |
| TSCA Listed | Yes |
| HTS Code | 29372300 |
| Tariff Code | 2937230000 |
Safety & GHS
-
Health Hazard
GHS07
-
Serious Health Hazard
GHS08
-
Hazardous to the Environment
GHS09
Hazard statements
- H302 Harmful if swallowed
- H350 May cause cancer
- H360Df May damage the unborn child. Suspected of damaging fertility.
- H410 Very toxic to aquatic life with long lasting effects
Precautionary statements
- P261 Avoid breathing dust/fume/gas/mist/vapours/spray
- P263 Avoid contact during pregnancy/while nursing
- 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
- 17-Ethinylestradiol
- 17alpha-Ethynylestradiol
- Amenoron
- Estinyl
- ethinyl estradiol
- Ethinyloestradiol
- Etinoestryl
- Ginestrene
- Lynoral
- Progynon C
Frequently asked questions
What is ethynylestradiol used for?
Ethynylestradiol is primarily used as a synthetic form of the hormone estrogen in contraceptive pills, hormone replacement therapy, and certain fertility treatments.
What is the chemical formula and molecular weight of ethynylestradiol?
The chemical formula is **C₂₀H₂₄O₂** with a molecular weight of **296.40 g/mol**.
How should ethynylestradiol be stored?
Store ethynylestradiol at **ambient temperature** in a tightly sealed container, away from light and moisture.
What grades of ethynylestradiol does Molekula supply?
Molekula supplies **pharmaceutical-grade ethynylestradiol** (USP/EP/BP compliant) for regulated applications.
Can Molekula supply ethynylestradiol in bulk quantities?
Yes, Molekula can supply ethynylestradiol in bulk, with quantities tailored to your research, manufacturing, or production needs.
What documentation comes with an order of ethynylestradiol?
Each order includes a **Certificate of Analysis (CoA)**, **Material Safety Data Sheet (MSDS)**, and, for pharmaceutical-grade, a **Drug Master File (DMF) reference** if applicable.
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.