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Screening compounds

Fosfestrol

Also known as Diethylstilbestrol diphosphate, Honvan, Phosphestrol

CAS 522-40-7Formula C18H22O8P2Molar mass 428.31 g/molEC 208-328-8
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Fosfestrol chemical structure, C18H22O8P2, CAS 522-40-7
2D chemical structure

Key facts

What buyers check first

All properties
Physical form
Powder
Melting point
203.9 to 206.1 °C
Density
1 (NTP, 1992)
Solubility
Less than 1 mg/mL at 66 °F (NTP, 1992)
HS code
291990
Category
Screening compounds
UN number
UN 3249
Illustrative photo, a shrink wrapped pallet of kraft paper sacks in a chemical plant
Typical packagingIllustrative packaging image, not the actual product

What is Fosfestrol?

Plain description, key identifiers and synonyms

Diethylstilbestrol diphosphate is an aryl phosphate. It is functionally related to a diethylstilbestrol.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
[4-[(E)-4-(4-phosphonooxyphenyl)hex-3-en-3-yl]phenyl] dihydrogen phosphate
CAS number
522-40-7 CAS number cross-checked
EC number
208-328-8
Molecular formula
C18H22O8P2
UNII
A0E0NMA80F
InChIKey
NLORYLAYLIXTID-ISLYRVAYSA-N
InChI
InChI=1S/C18H22O8P2/c1-3-17(13-5-9-15(10-6-13)25-27(19,20)21)18(4-2)14-7-11-16(12-8-14)26-28(22,23)24/h5-12H,3-4H2,1-2H3,(H2,19,20,21)(H2,22,23,24)/b18-17+
Canonical SMILES
CCC(=C(CC)c1ccc(OP(=O)(O)O)cc1)c1ccc(OP(=O)(O)O)cc1
Isomeric SMILES
CC/C(=C(/CC)\C1=CC=C(C=C1)OP(=O)(O)O)/C2=CC=C(C=C2)OP(=O)(O)O

Synonyms

  • Diethylstilbestrol diphosphate
  • Honvan
  • Phosphestrol
  • Stilbestrol diphosphate
  • Desdp
  • ST52-Asta
  • Fosfestrolum
  • Diethylstilbestryl diphosphate
  • Diethylstilbesterol diphosphate
  • alpha,alpha'-Diethyl-(E)-4,4'-stilbenediol bis(dihydrogen phosphate)
  • Diethylstilbestrol diphosphate (USP)
  • Honvol
  • Phenol, 4,4'-(1,2-diethyl-1,2-ethenediyl)bis-, bis(dihydrogen phosphate), (E)-
  • 4,4'-Stilbenediol, alpha,alpha'-diethyl-, bis(dihydrogen phosphate), (E)-
  • difostilben
  • fosfesterol
  • alpha,alpha'-Diethyl-4,4'-stilbenediol diphosphate
  • fosfestrolo
  • diethyldioxystilbene diphosphate
  • (4-((E)-1-ethyl-2-(4-phosphonooxyphenyl)but-1-enyl)phenyl) dihydrogen phosphate
  • [4-[(E)-1-ethyl-2-(4-phosphonooxyphenyl)but-1-enyl]phenyl] dihydrogen phosphate
  • Stilboestrol Diphosphate
  • Fosfestrol Sodium Phosphoestrolum
  • alpha,alpha'-diethyl-4,4'-stilbenediol diphosphoric acid ester
  • Diethylstilbestrol 4,4'-Diphosphoric Ester
Show all 35 synonyms
  • (E)-4,4'-(1,2-ethenediyl)-bisphenol bis(dihydrogen phosphate)
  • Diethyldihydroxystilbene Diphosphate
  • Stilphostrol
  • Phosphoestrolum
  • (E)-Hex-3-ene-3,4-diylbis(4,1-phenylene) bis(dihydrogen phosphate)
  • [4-[(E)-4-(4-phosphonooxyphenyl)hex-3-en-3-yl]phenyl] dihydrogen phosphate
  • Stilphostrol (TN)
  • Diethylstilbestrol bisphosphate
  • Phenol, 4,4'-((1E)-1,2-diethyl-1,2-ethenediyl)bis-, bis(dihydrogen phosphate)
  • Phenol, 4,4'-[(1E)-1,2-diethyl-1,2-ethenediyl]bis-, bis(dihydrogen phosphate)

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

Physical form
Powderexp.
Melting point
203.9 to 206.1 °Cexp.
Density
1 (NTP, 1992)exp.
Solubility
Less than 1 mg/mL at 66 °F (NTP, 1992)exp.

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
428.31 g/molcalc.
Exact mass
428.079 Dacalc.
LogP (octanol/water)
4.36calc.
Topological polar surface area
133.5 Ųcalc.
Hydrogen bond donors
4calc.
Hydrogen bond acceptors
4calc.
Rotatable bonds
8calc.
Heavy atoms
28calc.
Rings
2calc.
Aromatic rings
2calc.
Fraction sp3 carbons
0.22calc.
Formal charge
0calc.
Stereocentres
0calc.
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, C(=Cc1ccccc1)c1ccccc1

C(=Cc1ccccc1)c1ccccc1

2 rings, 14 atoms, the Stilbene ring system.

2,005 other chemicals share this scaffold

Safety and hazards

GHS classification summary, not a safety data sheet

GHS classification
Hazard pictograms
UN number
UN 3249

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

Fosfestrol suppliers

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

All 2 suppliers

Suppliers marked Unclaimed profile have not claimed their profile yet. They are not verified by CompoundList, their offers are price on request and details may have changed, so please confirm them with the supplier. Company representatives can claim a profile with a business email on the company's own website domain. Our team verifies each claim and sends the result by email.

Where suppliers are based

2 suppliers in 2 countries

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Fosfestrol price

Indicative price range per kg from live supplier offers

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Uses and applications

What the substance is used for, by industry and function

Pharmacological actions

  • Antineoplastic Agents, Hormonal

Roles

  • antineoplastic agent
  • pharmaceutical

Pharmacology

Fosfestrol is the diphosphate ester of a synthetic, nonsteroidal form of estrogen. A well-known teratogen and carcinogen, diethylstilbestrol inhibits the hypothalamic-pituitary-gonadal axis, thereby blocking the testicular synthesis of testosterone, lowering plasma testosterone, and inducing a chemical castration.

Regulatory status

Inventories, regulations and trade controls that list this substance

No regulatory list memberships are recorded for this substance yet. Always check the rules of the importing and exporting country before trade.

HS code and trade data

Customs classification and reported world trade statistics

Global trade

World import and export statistics for the HS code Fosfestrol is traded under.

HS 2919.90Indicative HS code

Phosphoric, and their salts, including lactophosphates, their halogenated, sulphonated, nitrated…

World exports in 2024
$940M
−0.7% vs 2023, imports $863M
2019 to 2024
Top exporters
  1. China55.6%
  2. Germany10.6%
  3. Italy6.2%
Top importers
  1. United States15.8%
  2. South Korea10.1%
  3. Germany6.4%
Reported customs values in USD, not prices.Full trade data

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

Frequently asked questions

Quick answers about Fosfestrol, based on the data on this page

What is Fosfestrol?

Diethylstilbestrol diphosphate is an aryl phosphate. It is functionally related to a diethylstilbestrol.

What is the CAS number of Fosfestrol?

The CAS registry number of Fosfestrol is 522-40-7.

What is the molecular formula and weight of Fosfestrol?

The molecular formula of Fosfestrol is C18H22O8P2 and its molar mass is 428.31 g/mol.

What is Fosfestrol used for?

Known uses and roles of Fosfestrol include building blocks in research and laboratory, screening compounds in research and laboratory, antineoplastic agent, pharmaceutical and antineoplastic agents, hormonal.

Is Fosfestrol hazardous?

No GHS hazard classification for Fosfestrol is recorded on CompoundList yet. That does not prove it is safe. Always read the supplier safety data sheet.

What is the HS code of Fosfestrol?

Fosfestrol is usually classified under HS code 291990 (Phosphoric esters and their salts, including lactophosphates, their halogenated…). This is indicative, confirm it with your customs broker before shipping.

Where can I buy Fosfestrol?

CompoundList lists 2 suppliers of Fosfestrol in Russia and Singapore. Send one free request to get and compare quotes. Your contact details stay private until you accept a quote.

What is the price of Fosfestrol?

Suppliers quote Fosfestrol 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 Fosfestrol

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Data last updated 7 Oct 2026. Details may have changed, please confirm them with the supplier. Report an error on this page
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