5a-androstane

Modify Date: 2026-07-01 08:50:19

5a-androstane Structure
5a-androstane structure
Common Name 5a-androstane
CAS Number 438-22-2 Molecular Weight 260.457
Density 0.9±0.1 g/cm3 Boiling Point 336.0±9.0 °C at 760 mmHg
Molecular Formula C19H32 Melting Point 78-82 °C(lit.)
MSDS Chinese USA Flash Point 145.9±12.3 °C
Symbol GHS07 GHS08
GHS07, GHS08
Signal Word Warning

Summary: 5α-androstane (5-ALPHA-雄烷) with CAS number 438-22-2 has a molecular formula of C19H32 and a molecular weight of 260.457. It appears as a liquid, with a melting point of 78-82 °C and a boiling point of 336.0±9.0 °C, and a density of 0.9±0.1 g/cm3. For research-use only, not for medical or clinical usage.


 Names

This table lists Chinese names, IUPAC names and various aliases of this chemical substance.

Name 5α-androstane
Synonym More Synonyms

 Chemical & Physical Properties

This table shows physicochemical parameters including melting point, boiling point, density, solubility and optical rotation. Missing data is marked as N/A.

Density 0.9±0.1 g/cm3
Boiling Point 336.0±9.0 °C at 760 mmHg
Melting Point 78-82 °C(lit.)
Molecular Formula C19H32
Molecular Weight 260.457
Flash Point 145.9±12.3 °C
Exact Mass 260.250397
LogP 8.42
Vapour Pressure 0.0±0.3 mmHg at 25°C
Index of Refraction 1.508
InChIKey QZLYKIGBANMMBK-UGCZWRCOSA-N
SMILES CC12CCCC1C1CCC3CCCCC3(C)C1CC2
Storage condition -20℃

 MSDS

This table provides MSDS information including hazard classification, first‑aid, fire‑fighting, spill handling, operation and storage instructions.

 Safety Information

This table covers safety warnings, protective measures, incompatible substances and disposal guidelines for this compound.

Symbol GHS07 GHS08
GHS07, GHS08
Signal Word Warning
Hazard Statements H315-H319-H335-H336-H351-H373
Precautionary Statements P261-P281-P305 + P351 + P338
Target Organs Blood, Central nervous system, Liver
Personal Protective Equipment Eyeshields;Gloves;type N95 (US);type P1 (EN143) respirator filter
Hazard Codes T: Toxic;
Risk Phrases 45-23/24/25-36/37/38-43-63
Safety Phrases S53-S23-S24/25-S36/37
RIDADR UN 1593 6.1/PG 3
WGK Germany 3

 Synthetic Route

This table presents publicly reported synthetic routes, reaction conditions, reactants and product information of the compound.

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5a-androstane Structure

5a-androstane

CAS#:438-22-2

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Literature: Butenandt; Tscherning Hoppe-Seyler's Zeitschrift fuer Physiologische Chemie, 1934 , vol. 229, p. 185,190 Full Text Show Details Heard; McKay Journal of Biological Chemistry, 1939 , vol. 131, p. 371,378 Full Text Show Details Reichstein Helvetica Chimica Acta, 1936 , vol. 19, p. 979,983

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5a-androstane Structure

5a-androstane

CAS#:438-22-2

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Literature: Burrows et al. Biochemical Journal, 1937 , vol. 31, p. 950,957

~%

5a-androstane Structure

5a-androstane

CAS#:438-22-2

Learn More
Literature: Burrows et al. Biochemical Journal, 1937 , vol. 31, p. 950,957

~%

5a-androstane Structure

5a-androstane

CAS#:438-22-2

Learn More
Literature: Burrows et al. Biochemical Journal, 1937 , vol. 31, p. 950,957

~%

5a-androstane Structure

5a-androstane

CAS#:438-22-2

Learn More
Literature: Butenandt; Tscherning Hoppe-Seyler's Zeitschrift fuer Physiologische Chemie, 1934 , vol. 229, p. 185,190

~%

5a-androstane Structure

5a-androstane

CAS#:438-22-2

Learn More
Literature: Kaegi; Miescher Helvetica Chimica Acta, 1939 , vol. 22, p. 683,695 Full Text Show Details Prelog; Ruzicka; Wieland Helvetica Chimica Acta, 1944 , vol. 27, p. 66,69

~%

5a-androstane Structure

5a-androstane

CAS#:438-22-2

Learn More
Literature: Reichstein Helvetica Chimica Acta, 1936 , vol. 19, p. 979,983

 Articles24

More Articles

This table lists relevant public references with title, journal and publication metadata for this compound.

Potent and selective steroidal inhibitors of 17beta-hydroxysteroid dehydrogenase type 7, an enzyme that catalyzes the reduction of the key hormones estrone and dihydrotestosterone.

J. Med. Chem. 52 , 7488-502, (2009)

17beta-Hydroxysteroid dehydrogenase type 7 (17beta-HSD7) catalyzes the reduction of estrone (E(1)) into estradiol (E(2)) and of dihydrotestosterone (DHT) into 5alpha-androstane-3beta,17beta-diol (3bet...

Novel and efficient synthesis and antifungal evaluation of 2,3-functionalized cholestane and androstane derivatives

Bioorg. Med. Chem. Lett. 20 , 7372-5, (2010)

Synthetic modifications of cholesterol and other traditional steroid molecules have become a promising area for the exploration and development of novel antifungal agents, especially with respect to t...

[Bioconversion of C19- and C21-steroids with parent and mutant strains of Curvularia lunata].

Prikl. Biokhim. Mikrobiol. 46(2) , 212-20, (2010)

Regio- and stereospecificity of microbial hydroxylation was studied at the transformation of 3-keto-4-ene steroids of androstane and pregnane series by the filamentous fungus of Curvularia lunata VKMF...

 Synonyms

This table collects all English aliases, systematic names and CAS‑related synonyms of the compound.

Aetioallocholane
5α-Androstan
5alpha-Androstane
MFCD00067600
(5a)-Androstane
(5α)-Androstane
Etioallocholane
(5R,8S,9S,10S,13S,14S)-10,13-dimethyl-2,3,4,5,6,7,8,9,11,12,14,15,16,17-tetradecahydro-1H-cyclopenta[a]phenanthrene
5α,14α-Androstane
5a-androstane
EINECS 207-116-2
Aetioallocholan
5α-androstane
Androstane

 5a-androstane | FAQ

This section contains frequently‑asked‑questions about this compound, including basic parameters, properties, storage conditions and corresponding answers.

Q: What is the safety information for 5α-androstane?
A: Safety information for 5α-androstane: S53-S23-S24/25-S36/37.
Q: What English synonyms does 5α-androstane have?
A: English synonyms of 5α-androstane: Aetioallocholane, 5α-Androstan, 5alpha-Androstane, MFCD00067600, (5a)-Androstane, (5α)-Androstane, Etioallocholane, (5R,8S,9S,10S,13S,14S)-10,13-dimethyl-2,3,4,5,6,7,8,9,11,12,14,15,16,17-tetradecahydro-1H-cyclopenta[a]phenanthrene, 5α,14α-Androstane, 5a-androstane, EINECS 207-116-2, Aetioallocholan, 5α-androstane, Androstane.
Q: What is the molecular formula of 5α-androstane?
A: Molecular formula of 5α-androstane is C19H32.
Q: What is the InChIKey of 5α-androstane?
A: InChIKey of 5α-androstane is QZLYKIGBANMMBK-UGCZWRCOSA-N.
Q: What is the English name of 5α-androstane?
A: The English name of 5α-androstane is 5α-androstane.
Q: What is the CAS number of 5α-androstane?
A: CAS number of 5α-androstane is 438-22-2.
Q: What is the molecular weight of 5α-androstane?
A: Molecular weight of 5α-androstane is 260.457.
Q: What is the SMILES notation of 5α-androstane?
A: SMILES notation of 5α-androstane is CC12CCCC1C1CCC3CCCCC3(C)C1CC2.
Q: What is the LogP of 5α-androstane?
A: LogP of 5α-androstane is 8.42.
Q: What are the upstream materials of 5α-androstane?
A: Related upstream materials(CAS) of 5α-androstane: 846-46-8;53-43-0;963-74-6;1912-63-6;27741-16-8;6618-43-5;64-19-7;7647-01-0;1429-06-7.

 5a-androstanefactory

This table lists manufacturers and suppliers of this compound, including vendor names and product supply reference information.

Shanghai Nianxing Industrial Co., Ltd
Dayang Chem (Hangzhou) Co., Ltd.
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