CompoundList
Sign in
Hormones and steroids

1-Testosterone

Also known as Delta1-dihydrotestosterone, 1-Testo, 17beta-Hydroxy-5alpha-androst-1-en-3-one

CAS 65-06-5Formula C19H28O2Molar mass 288.43 g/molEC 636-242-4
GHS signal word: Danger. Pictograms: Acute toxicity (severe), Harmful or irritant, Serious health hazard
Get quotes Safety data
1-Testosterone chemical structure, C19H28O2, CAS 65-06-5
2D chemical structure

Key facts

What buyers check first

All properties
CAS number
65-06-5
Formula
C19H28O2
Molar mass
288.43 g/mol
EC number
636-242-4
HS code
291440
Category
Hormones and steroids

What is 1-Testosterone?

Plain description, key identifiers and synonyms

Delta(1)-dihydrotestosterone is an anabolic steroid that differs from testosterone by having a 1,2-double bond instead of a 4,5-double bond in its A ring. A potent androgen with anabolic properties, it was legally sold as a prohormone in the U.S.A. until 2005, when it was reclassified as a Schedule III drug. It has a role as an anabolic agent. It is a 3-oxo-Delta(1) steroid, a 17beta-hydroxy steroid and an anabolic androgenic steroid.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
(5S,8R,9S,10R,13S,14S,17S)-17-hydroxy-10,13-dimethyl-4,5,6,7,8,9,11,12,14,15,16,17-dodecahydrocyclopenta[a]phenanthren-3-one
CAS number
65-06-5 CAS number cross-checked
EC number
636-242-4
Molecular formula
C19H28O2
UNII
Y984BV1Q0G
InChIKey
OKJCFMUGMSVJBG-ABEVXSGRSA-N
InChI
InChI=1S/C19H28O2/c1-18-9-7-13(20)11-12(18)3-4-14-15-5-6-17(21)19(15,2)10-8-16(14)18/h7,9,12,14-17,21H,3-6,8,10-11H2,1-2H3/t12-,14-,15-,16-,17-,18-,19-/m0/s1
Canonical SMILES
CC12C=CC(=O)CC1CCC1C2CCC2(C)C(O)CCC12
Isomeric SMILES
C[C@]12CC[C@H]3[C@H]([C@@H]1CC[C@@H]2O)CC[C@@H]4[C@@]3(C=CC(=O)C4)C

Synonyms

  • Delta1-dihydrotestosterone
  • 1-Testo
  • 17beta-Hydroxy-5alpha-androst-1-en-3-one
  • Androstendolone
  • 1-Androstene-17-ol-3-one
  • 1-T [Steroid]
  • 5alpha-androst-1-en-17beta-ol-3-one
  • 1-(5beta)-Androstene-17beta-ol-3-one
  • delta1-Testosterone (1.0/mg/mL in Acetonitrile)
  • h_117_1_testosterone
  • 5alpha-Androst-1-en-3-one, 17beta-hydroxy-
  • Delta(1)-dihydrotestosterone
  • (5alpha,17beta)-hydroxyandrost-1-en-3-one
  • 1-Testosterone Solution in Acetonitrile, 100ug/mL

Physical and chemical properties

Measured values and descriptors computed from the structure

Physical and chemical properties

Measured values, check the supplier specification for your grade

No measured properties are recorded for this substance yet. Ask suppliers for a technical data sheet.

Values vary by grade. Ask suppliers for the COA or TDS of the batch you buy.

Computed descriptors

Calculated from the structure, useful for screening and formulation

Molecular weight
288.43 g/molcalc.
Exact mass
288.2089 Dacalc.
LogP (octanol/water)
3.74calc.
Topological polar surface area
37.3 Ųcalc.
Hydrogen bond donors
1calc.
Hydrogen bond acceptors
2calc.
Rotatable bonds
0calc.
Heavy atoms
21calc.
Rings
4calc.
Aromatic rings
0calc.
Fraction sp3 carbons
0.84calc.
Formal charge
0calc.
Stereocentres
7calc.
Lipinski rule of five
Passes (0 violations)calc.

Calculated for screening. Confirm critical figures with the supplier.

Murcko scaffold

The ring system that remains when every side chain is removed

Murcko scaffold of this chemical, O=C1C=CC2C(CCC3C4CCCC4CCC23)C1

O=C1C=CC2C(CCC3C4CCCC4CCC23)C1

4 rings, 18 atoms.

42 other chemicals share this scaffold

Safety and hazards

GHS classification summary, not a safety data sheet

GHS signal word
Danger
GHS06: Acute toxicity (severe)
Acute toxicity (severe)
GHS07: Harmful or irritant
Harmful or irritant
GHS08: Serious health hazard
Serious health hazard

Hazard statements

  • H301Toxic if swallowed.
  • H311Toxic in contact with skin.
  • H315Causes skin irritation.
  • H319Causes serious eye irritation.
  • H331Toxic if inhaled.
  • H335May cause respiratory irritation.
  • H350May cause cancer.
Precautionary statements (24)
  • P203Obtain, read and follow all safety instructions before use.
  • P261Avoid breathing dust, fume, gas, mist, vapours or spray.
  • P262Do not get in eyes, on skin, or on clothing.
  • P264Wash skin thoroughly after handling.
  • P264 + P265Wash skin thoroughly after handling. Do not touch eyes.
  • P270Do not eat, drink or smoke when using this product.
  • P271Use only outdoors or in a well-ventilated area.
  • P280Wear protective gloves, protective clothing, eye protection and face protection.
  • P301 + P316If swallowed: Get emergency medical help immediately.
  • P302 + P352If on skin: Wash with plenty of water.
  • P304 + P340If inhaled: Remove person to fresh air and keep comfortable for breathing.
  • P305 + P351 + P338If in eyes: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.
  • P316Get emergency medical help immediately.
  • P318If exposed or concerned, get medical advice.
  • P319Get medical help if you feel unwell.
  • P321Specific treatment (see supplemental first aid instructions on the label).
  • P330Rinse mouth.
  • P332 + P317If skin irritation occurs: Get medical help.
  • P337 + P317If eye irritation persists: Get medical help.
  • P361 + P364Take off immediately all contaminated clothing. And wash it before reuse.
  • P362 + P364Take off contaminated clothing. And wash it before reuse.
  • P403 + P233Store in a well-ventilated place. Keep container tightly closed.
  • P405Store locked up.
  • P501Dispose of contents and container in accordance with local regulations.

GHS classification summary, not a safety data sheet (SDS). Classifications can differ by supplier, grade and concentration. Always check the supplier's SDS.

Full safety data and first aid

1-Testosterone suppliers

Sponsored listings first, then the documented ranking: membership, verification, replies, completeness, freshness and ratings

No supplier listings yet

Post one free request and suppliers who make or trade 1-Testosterone can send you quotes. Your contact details stay private until you accept a quote.

Request quotesSell this chemical

1-Testosterone price

Indicative price range per kg from live supplier offers

No published prices right now

Suppliers quote this chemical on request. Send one free request and compare quotes side by side.

Get latest price

Uses and applications

What the substance is used for, by industry and function

Roles

  • agonist
  • anabolic agent
  • hormone
  • molecular messenger

Functional uses

  • Pharmaceutical

Regulatory status

Inventories, regulations and trade controls that list this substance

Controls

  • US DEA controlled substance or listed chemical

HS code and trade data

Customs classification and reported world trade statistics

Global trade

World import and export statistics for the HS code 1-Testosterone is traded under.

HS 2914.40Indicative HS code

Ketone-alcohols and ketone-aldehydes

World exports in 2024
$199M
+2.5% vs 2023, imports $247M
2019 to 2024
Top exporters
  1. China29.5%
  2. Germany14.4%
  3. Netherlands12.7%
Top importers
  1. United States37.2%
  2. Netherlands8.5%
  3. Germany6.4%
Reported customs values in USD, not prices.Full trade data

The HS code shown for 1-Testosterone is indicative (it was assigned by structure rules). Confirm the classification with your customs broker before shipping.

Frequently asked questions

Quick answers about 1-Testosterone, based on the data on this page

What is 1-Testosterone?

Delta(1)-dihydrotestosterone is an anabolic steroid that differs from testosterone by having a 1,2-double bond instead of a 4,5-double bond in its A ring. A potent androgen with anabolic properties, it was legally sold as a prohormone in the U.S.A. until 2005, when it was reclassified as a Schedule III drug.

What is the CAS number of 1-Testosterone?

The CAS registry number of 1-Testosterone is 65-06-5.

What is the molecular formula and weight of 1-Testosterone?

The molecular formula of 1-Testosterone is C19H28O2 and its molar mass is 288.43 g/mol.

What is 1-Testosterone used for?

Known uses and roles of 1-Testosterone include hormones and steroids in pharmaceuticals, agonist, anabolic agent, hormone, molecular messenger and 1 more.

Is 1-Testosterone hazardous?

1-Testosterone carries the GHS signal word "Danger". Main hazards: toxic if swallowed, toxic in contact with skin, causes skin irritation. This summary is not an SDS, always read the supplier safety data sheet.

What is the HS code of 1-Testosterone?

1-Testosterone is usually classified under HS code 291440 (Ketone-alcohols and ketone-aldehydes). This is indicative, confirm it with your customs broker before shipping.

Where can I buy 1-Testosterone?

Post a free request on CompoundList and suppliers of 1-Testosterone will send you quotes. Your contact details stay private until you accept a quote.

What is the price of 1-Testosterone?

Suppliers quote 1-Testosterone on request because prices depend on grade, purity, quantity and destination. A free request on CompoundList gets you several quotes to compare.

Guides for buyers

Practical guides that help when you source, ship or handle 1-Testosterone

Get quotes for 1-Testosterone

Post one free request with your grade, quantity and destination. Matching suppliers send quotes you can compare side by side.
Post a request Sell 1-Testosterone
Data last updated 7 Oct 2026. Details may have changed, please confirm them with the supplier. Report an error on this page
Embed this structure on your websiteShow code

Paste this code into your page to show the 2D structure of 1-Testosterone with a 3D view, its CAS number where known and a link back to this page. Free to use with the link kept.

<iframe src="https://www.compoundlist.com/embed/structure/1-testosterone-65-06-5" title="1-Testosterone structure on CompoundList" width="360" height="420" style="border:1px solid #E7E2DA;border-radius:12px;max-width:100%" loading="lazy" referrerpolicy="strict-origin-when-cross-origin"></iframe>
Preview the embed

Explore more in Hormones and steroids or HS code 291440

Price on request
Free quotes, contact stays private
Get quotes