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Insecticides and acaricides

Famphur

Also known as Famophos, Warbex, Famofos

CAS 52-85-7Formula C10H16NO5PS2Molar mass 325.35 g/molEC 200-154-0
GHS signal word: Danger. Pictograms: Acute toxicity (severe), Harmful or irritant
Get quotes Safety data
Famphur chemical structure, C10H16NO5PS2, CAS 52-85-7
2D chemical structure

Key facts

What buyers check first

All properties
Appearance
Crystals
Melting point
52.5 to 53.5
Solubility
Sparingly soluble in water. In aqueous isopropanol (45%) 23 g/kg (20 °C), in xylene 300…
HS code
293590
Category
Insecticides and acaricides
Illustrative photo, closed white HDPE bottles and amber jars on a laboratory bench
Typical packagingIllustrative packaging image, not the actual product

What is Famphur?

Plain description, key identifiers and synonyms

Famphur is an organothiophosphate insecticide and an organic thiophosphate. It has a role as an agrochemical, an anthelminthic drug and an EC 3.1.1.7 (acetylcholinesterase) inhibitor. It is functionally related to a 4-hydroxy-N,N-dimethylbenzenesulfonamide.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
4-dimethoxyphosphinothioyloxy-N,N-dimethylbenzenesulfonamide
CAS number
52-85-7 CAS number cross-checked
EC number
200-154-0
Molecular formula
C10H16NO5PS2
UNII
02UOP4Z0O0
MDL number
MFCD00055307
InChIKey
JISACBWYRJHSMG-UHFFFAOYSA-N
InChI
InChI=1S/C10H16NO5PS2/c1-11(2)19(12,13)10-7-5-9(6-8-10)16-17(18,14-3)15-4/h5-8H,1-4H3
SMILES (canonical and isomeric)
CN(C)S(=O)(=O)C1=CC=C(C=C1)OP(=S)(OC)OC

Synonyms

  • Famophos
  • Warbex
  • Famofos
  • Famphos
  • Warbexol
  • Dovip
  • Famfur
  • Fanfos
  • Famophos warbex
  • American cyanamid CL-38,023
  • ENT 25,644
  • AC 38023
  • Phosphorothioic acid, O-(4-((dimethylamino)sulfonyl)phenyl) O,O-dimethyl ester
  • O-4-Dimethylsulfamoylphenyl O,O-dimethyl phosphorothioate
  • O,O-Dimethyl O-(p-(dimethylsulfamoyl)phenyl) phosphorothioate
  • O-(4-((Dimethylamino)sulfonyl)phenyl) O,O-dimethyl phosphorothioate
  • p-Hydroxy-N,N-dimethylbenzenesulfonamide ester with phosphorothioic acid O,O-dimethyl ester
  • O-[4-(dimethylsulfamoyl)phenyl] O,O-dimethyl thiophosphate
  • O-[4-(dimethylsulfamoyl)phenyl] O,O-dimethyl phosphorothioate
  • Phosphorothioic acid, O-(4-((dimethylamino)sulfonyl)phenyl) O,O-
  • Phosphorothioic acid, O,O-dimethyl ester, O-ester with p-hydroxy-N,N-dimethylbenzene-sulfonamide
  • Phosphorothioic acid, O-[4-[(dimethylamino)sulfonyl]phenyl] O,O-dimethyl ester
  • O-(4-(dimethylsulfamoyl)phenyl) O,O-dimethyl thiophosphate
  • O,O-Dimethyl O-[p-(Dimethylsulfamoyl)phenyl] phosphorothioate
  • O-(4-(dimethylsulfamoyl)phenyl) O,O-dimethyl phosphorothioate
Show all 37 synonyms
  • Famix Famphur Premix
  • O,O-dimethyl O-p-(dimethylsulfamoyl)phenylphosphorothioate
  • Warbex Famphur Cattle Pour-on
  • BO-Ana
  • Rcra waste number P097
  • American cyanamid-38023
  • O,O-Dimethyl O-(p-(N,N-dimethylsulfamoyl)phenyl) phosphorothioate
  • Phosphorothioic acid, O,O-dimethyl ester, O-ester with p-hydroxy-N,N-dimethylbenzenesulfonamide
  • O,O-Dimethyl phosphorothioate O-ester with p-hydroxy-N,N-dimethylbenzenesulfonamide
  • american cyanamid 38023
  • RCRA waste no. P097
  • O-4-Dimethylsulphamoylphenyl O,O-dimethyl phosphorothioate

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

Appearance
Crystalsexp.
Melting point
52.5 to 53.5exp.
Solubility
Sparingly soluble in water. In aqueous isopropanol (45%) 23 g/kg (20 °C), in xylene 300 g/kg (5 °C), soluble in acetone, carbon tetrachloride, chloroform, cyclohexanone, dichloromethane, toluene, sparingly soluble in aliphatic hydrocarbonsexp.

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
325.35 g/molcalc.
Exact mass
325.0208 Dacalc.
LogP (octanol/water)
1.83calc.
Topological polar surface area
65.07 Ųcalc.
Hydrogen bond donors
0calc.
Hydrogen bond acceptors
6calc.
Rotatable bonds
6calc.
Heavy atoms
19calc.
Rings
1calc.
Aromatic rings
1calc.
Fraction sp3 carbons
0.4calc.
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, c1ccccc1

c1ccccc1

1 ring, 6 atoms, the Benzene ring system.

485,677 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

Hazard statements

  • H300Fatal if swallowed.
  • H312Harmful in contact with skin.
  • H315Causes skin irritation.
  • H319Causes serious eye irritation.
Precautionary statements (15)
  • 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.
  • 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.
  • P305 + P351 + P338If in eyes: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.
  • P317Get medical help.
  • 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.
  • P362 + P364Take off contaminated clothing. And wash it before reuse.
  • 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

Famphur suppliers

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Famphur price

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Uses and applications

What the substance is used for, by industry and function

The active ingredient is no longer contained in any registered pesticide products ... "cancelled.".

Registration cancelled.

Veterinary medication:.

Use classes: Animal Drugs.

Pharmacological actions

  • Insecticides

Roles

  • agrochemical
  • anthelminthic drug
  • antiinfective agent
  • antiparasitic agent
  • enzyme inhibitor
  • pharmaceutical

Pharmacology

Famphur is a synthetic organic thiophosphate compound and organothiophosphate acetylcholinesterase inhibitor that is used as a pesticide. It is characterized as a highly toxic, colorless crystalline solid, and exposure occurs by inhalation, ingestion, or contact.

How it is made

To a mixture of N,N-dimethyl-1-phenol-4-sulfonamide (5.0 g, 0.025 mol) and sodium hydroxide (1.0 g, 0.025 mol) in 50 ml of water are added separately and simultaneously O,O-dimethyl phosphorochloridothioate (4.0 g, 0.025 mol) and a solution of sodium hydroxide (1.0 g, 0.025 mol in 25 ml water).

Regulatory status

Inventories, regulations and trade controls that list this substance

United States

  • TSCA inventory (USA)
    Status: Active in US commerce

HS code and trade data

Customs classification and reported world trade statistics

Global trade

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

HS 2935.90Indicative HS code

Sulphonamides, other

World exports in 2024
$5.64B
−11.0% vs 2023, imports $8.56B
2019 to 2024
Top exporters
  1. Ireland43.1%
  2. China12.0%
  3. India * partner reported9.5%
Top importers
  1. United States23.6%
  2. Slovenia19.1%
  3. Spain11.7%

* Partner reported figures, a lower bound.

Reported customs values in USD, not prices.Full trade data

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

Frequently asked questions

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

What is Famphur?

Famphur is an organothiophosphate insecticide and an organic thiophosphate. It has a role as an agrochemical, an anthelminthic drug and an EC 3.1.1.7 (acetylcholinesterase) inhibitor. It is functionally related to a 4-hydroxy-N,N-dimethylbenzenesulfonamide.

What is the CAS number of Famphur?

The CAS registry number of Famphur is 52-85-7.

What is the molecular formula and weight of Famphur?

The molecular formula of Famphur is C10H16NO5PS2 and its molar mass is 325.35 g/mol.

What is Famphur used for?

The active ingredient is no longer contained in any registered pesticide products ... "cancelled.". Registration cancelled. Veterinary medication:. Use classes: Animal Drugs.

Is Famphur hazardous?

Famphur carries the GHS signal word "Danger". Main hazards: fatal if swallowed, harmful 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 Famphur?

Famphur is usually classified under HS code 293590 (Sulphonamides, other). This is indicative, confirm it with your customs broker before shipping.

Where can I buy Famphur?

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What is the price of Famphur?

Suppliers quote Famphur 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 Famphur

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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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