Equilin

About Equilin

Equilin is a high-purity reference standard of Equilin carrying the CAS registry number 474-86-2. Formula C18H20O2, molecular weight 268.3 g/mol. Systematically, it is named (9S,13S,14S)-3-hydroxy-13-methyl-9,11,12,14,15,16-hexahydro-6H-cyclopenta[a]phenanthren-17-one. It is also known as 7-Dehydroestrone or Dihydroequilenin.

It is supplied as a solid. Keep the vial tightly closed, protected from light and humidity, at the temperature stated on the Certificate of Analysis. It carries the GHS signal word “Danger” with 7 hazard statements. Review the Safety Data Sheet before use.

Laboratories use this Equilin standard for identity and assay testing, system suitability checks and method validation supporting ANDA and DMF filings. It is used across pharmaceutical manufacturing and academic and industrial research.

Standard pack sizes are 10 mg, 25 mg, 50 mg and 100 mg, and every batch ships with a Certificate of Analysis (COA) and we export worldwide.

Typical applications

Identification & assay
Method development & validation
QC reference material

Industries

Related to Equilin

View every impurity, metabolite and intermediate we list for Equilin.

Equilin impurities

Specifications & identifiers

Chemical identifiers
Product name	Equilin
Catalogue No.	VQ-025627
CAS Number	474-86-2
IUPAC name	(9S,13S,14S)-3-hydroxy-13-methyl-9,11,12,14,15,16-hexahydro-6H-cyclopenta[a]phenanthren-17-one
Molecular formula	C₁₈H₂₀O₂
Molecular weight	268.3 g/mol
Exact mass	268.1463
Grade	Reference Standard
HSN code	38229090
InChIKey	WKRLQDKEXYKHJB-HFTRVMKXSA-N
SMILES	C[C@]12CC[C@H]3C(=CCC4=C3C=CC(=C4)O)[C@@H]1CCC2=O
PubChem CID	223368

Physical properties
Physical form	Solid
LogP (XLogP3)	2.9
H-bond donors / acceptors	1 / 2
TPSA	37.3 Å²
Synonyms	7-Dehydroestrone, Dihydroequilenin, 1,3,5,7-Estratetraen-3-ol-17-one, Estra-1,3,5(10),7-tetraen-17-one, 3-hydroxy-, 3-hydroxy-estra-1,3,5(10),7tetraen-17-one, Opera_ID_780, 3-Hydroxyoestra-1,3,5(10),7-tetraen-17-one, 1,5,7-Estratetraen-3-ol-17-one, 3-Hydroxyestra-1,5(10),7-tetraen-17-one, 3-hydroxy-estra-1,3,5(10), 7-tetraen-17-one, 3-hydroxy-estra-1,3,5(10),7-tetraen-17-one, Estra-1,5(10),7-tetraen-17-one, 3-hydroxy-

Safety & hazard information (GHS)

Harmful / irritant

Health hazard

Signal word: Danger

Hazard statements

H302Harmful if swallowed
H312Harmful in contact with skin
H332Harmful if inhaled
H351Suspected of causing cancer
H360May damage fertility or the unborn child
H361Suspected of damaging fertility or the unborn child
H362May cause harm to breast-fed children

Precautionary statements: P203, P260, P261, P263, P264, P270, P271, P280, P301 + P317, P302 + P352, P304 + P340, P317, P318, P321, P330, P362 + P364, P405, P501

Classification is indicative (aggregated GHS notifications) and may vary by grade and concentration. Always refer to the SDS supplied with your lot.

Documents

Safety Data Sheet (SDS)16-section GHS · on request Certificate of AnalysisTypical / batch COA · on request Specification sheetTDS / MOA · on request

Frequently asked questions

What is the CAS number of Equilin?

The CAS Registry Number of Equilin is 474-86-2. It is also known as 7-Dehydroestrone, Dihydroequilenin, 1,3,5,7-Estratetraen-3-ol-17-one.

What is the molecular formula and molecular weight of Equilin?

Equilin has the molecular formula C18H20O2 and a molecular weight of 268.3 g/mol. Its IUPAC name is (9S,13S,14S)-3-hydroxy-13-methyl-9,11,12,14,15,16-hexahydro-6H-cyclopenta[a]phenanthren-17-one.

What is Equilin used for?

Equilin is supplied as a characterised reference material related to Equilin. It is used for analytical method development and validation (AMV), impurity profiling, stability studies and quality control, and in ANDA/DMF regulatory filings.

Which grade and pack sizes of Equilin can I order?

We supply Equilin in Reference Standard grade, in 10 mg, 25 mg, 50 mg, 100 mg packs. Larger bulk quantities and custom packing are quoted on request.

Do you provide a COA and SDS with Equilin?

Yes. Every lot of Equilin is shipped with a batch-specific Certificate of Analysis, and a 16-section GHS Safety Data Sheet is provided with the quotation and the shipment.

Can Equilin be shipped internationally?

Yes. Equilin is classified as hazardous, so it is packed in UN-approved packaging and shipped as dangerous goods under IATA/IMDG rules. We export worldwide on EXW, FOB, CIF and DAP terms.