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Home> Encyclopedia >Hormones and synthetic substitutes>Pharmaceutical Intermediates>Pharmaceutical
Methenolone enanthate structure
Methenolone enanthate structure

Methenolone enanthate

Iupac Name:[(5S,8R,9S,10S,13S,14S,17S)-1,10,13-trimethyl-3-oxo-4,5,6,7,8,9,11,12,14,15,16,17-dodecahydrocyclopenta[a]phenanthren-17-yl] heptanoate
CAS No.: 303-42-4
Molecular Weight:414.63
Modify Date.: 2022-11-29 09:52
Introduction: Methenolone enanthate (also known as primobolan depot) is a kind of injected anabolic-androgenic steroid (AAS) belonging to the dihydrotestosterone (DHT) group. It is a kind of anabolic steroids being safe for both male and female. IT can be used for the treatment of muscle wasting diseases, osteoporosis and sarcopenia as well as prolonged corticosteroid exposure. In some cases, it is also effective in the treatment of carcinoma and hepatitis. View more+
1. Names and Identifiers
1.1 Name
Methenolone enanthate
1.2 Synonyms

(5α,17β)-1-Methyl-17-[(1-oxoheptyl)oxy]androst-1-en-3-one 17-Hydroxy-1-methyl-5-androst-1-en-3-one-17-enanthate 17β-Hydroxy-1-methyl-5α-androst-1-en-3-one 17β-enanthate 17β-Hydroxy-1-methyl-5α-androst-1-en-3-one heptanoate 1-Methyl-17β-hydroxy-5α-androst-1-en-3-one enanthate 1-Methyl-Δ1-androsten-17β-ol-3-one enanthate 4,5,6,7,8,9,11,12,14,15,16,17-dodecahydrocyclopenta[a]phenanthren-17-yl] heptanoate 5α-Androst-1-en-3-one, 17β-hydroxy-1-methyl-, heptanoate Androst-1-en-3-one, 1-methyl-17-[(1-oxoheptyl)oxy]-, (5α,17β)- Metenolone enanthate Methenolone 17-enanthate Methenolone Enanthate(PriMobolan) NSC 64967 Primobolan Depot Primonabol Depot SH 601 SQ 16374

1.3 CAS No.
1.4 CID
1.6 Molecular Formula
C27H42O3 (isomer)
1.7 Inchi
1.8 InChkey
1.9 Canonical Smiles
1.10 Isomers Smiles
2. Properties
2.1 Density
2.1 Melting point
70-70.5 °C
2.1 Boiling point
504.3 °C at 760 mmHg
2.1 Refractive index
2.1 Flash Point
213.1 °C
2.1 Precise Quality
2.1 PSA
2.1 logP
2.1 Color/Form
3. Use and Manufacturing
3.1 GHS Classification
Signal: Danger
GHS Hazard Statements
Aggregated GHS information provided by 16 companies from 1 notifications to the ECHA C&L Inventory. Each notification may be associated with multiple companies.

H302 (100%): Harmful if swallowed [Warning Acute toxicity, oral]
H351 (100%): Suspected of causing cancer [Warning Carcinogenicity]
H360 (100%): May damage fertility or the unborn child [Danger Reproductive toxicity]
H362 (100%): May cause harm to breast-fed children [Reproductive toxicity, effects on or via lactation]

Information may vary between notifications depending on impurities, additives, and other factors. The percentage value in parenthesis indicates the notified classification ratio from companies that provide hazard codes. Only hazard codes with percentage values above 10% are shown.

Precautionary Statement Codes
P201, P202, P260, P263, P264, P270, P281, P301+P312, P308+P313, P330, P405, and P501
3.2 Usage
4. Safety and Handling
4.1 Hazard Codes
4.1 Safety Statements
S22; S26; S36/37/39
4.1 Hazard Declaration
4.1 Caution Statement
P201, P202, P260, P263, P264, P270, P281, P301+P312, P308+P313, P330, P405, P501
4.1 Specification

The Methenolone enanthate, with the cas registry number 303-42-4, has its systematic name of(5alpha,17beta)-1-methyl-3-oxoandrost-1-en-17-yl heptanoate, and its IUPAC name is (1,10,13-trimethyl-3-oxo-4,5,6,7,8,9,11,12,14,15,16,17-dodecahydrocyclopenta[a]phenanthren-17-yl) heptanoate. And it belngs to the product categories which are Steroids.
The characteristics of this chemical are as follows: (1)#H bond acceptors: 3; (2)#Freely Rotating Bonds: 7; (3)Polar Surface Area: 43.37; (4)Index of Refraction: 1.525; (5)Molar Refractivity: 120.45 cm3; (6)Molar Volume: 392.5 cm3; (7)Polarizability: 47.75 ×10-24 cm3; (8)Surface Tension: 40.5 dyne/cm; (9)Density: 1.05 g/cm3; (10)Flash Point: 213.1 °C; (11)Enthalpy of Vaporization: 77.37 kJ/mol; (12)Boiling Point: 504.3 °C at 760 mmHg; (13)Vapour Pressure: 2.69E-10 mmHg at 25°C; (14)Exact Mass: 414.313395; (15)MonoIsotopic Mass: 414.313395; (16)Topological Polar Surface Area: 43.4; (17)Heavy Atom Count: 30; (18)Complexity: 709.

Additionally, the following data information could be converted into the molecular structure:


2.Hazard identification

2.1 Classification of the substance or mixture

Acute toxicity - Oral, Category 4

Carcinogenicity, Category 2

Reproductive toxicity, Category 1A

Reproductive toxicity, Additional category for effects on or via lactation

2.2 GHS label elements, including precautionary statements

Signal word


Hazard statement(s)

H302 Harmful if swallowed

H351 Suspected of causing cancer

H360 May damage fertility or the unborn child

H362 May cause harm to breast-fed children

Precautionary statement(s)

P264 Wash ... thoroughly after handling.

P270 Do not eat, drink or smoke when using this product.

P201 Obtain special instructions before use.

P202 Do not handle until all safety precautions have been read and understood.

P280 Wear protective gloves/protective clothing/eye protection/face protection.

P260 Do not breathe dust/fume/gas/mist/vapours/spray.

P263 Avoid contact during pregnancy and while nursing.


P301+P312 IF SWALLOWED: Call a POISON CENTER/doctor/\u2026if you feel unwell.

P330 Rinse mouth.

P308+P313 IF exposed or concerned: Get medical advice/ attention.


P405 Store locked up.


P501 Dispose of contents/container to ...

2.3 Other hazards which do not result in classification


6. NMR Spectrum
7. Other Information
7.0 Mesh Entry Terms
methenolone enanthate
7.1 Dea Controlled Substances
Methenolone|Primobolan, Primobolan Depot, Primobolan S|4000|Schedule III - Substances in the DEA Schedule III have a potential for abuse less than substances in Schedules I or II and abuse may lead to moderate or low physical dependence or high psychological dependence.|No
8. Computational chemical data
  • Molecular Weight: 414.63g/mol
  • Molecular Formula: C27H42O3
  • Compound Is Canonicalized: True
  • XLogP3-AA: 6.9
  • Exact Mass: 414.31339520
  • Monoisotopic Mass: 414.31339520
  • Complexity: 709
  • Rotatable Bond Count: 7
  • Hydrogen Bond Donor Count: 0
  • Hydrogen Bond Acceptor Count: 3
  • Topological Polar Surface Area: 43.4
  • Heavy Atom Count: 30
  • Defined Atom Stereocenter Count: 7
  • Undefined Atom Stereocenter Count: 0
  • Defined Bond Stereocenter Count: 0
  • Undefined Bond Stereocenter Count: 0
  • Isotope Atom Count: 0
  • Covalently-Bonded Unit Count: 1
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10. Realated Product Infomation