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Central nervous system drugs

Fludiazepam

Also known as Erispan, Fludiazepamum, 7-Chloro-5-(o-Fluorophenyl)-1,3-dihydro-1-methyl-2H-1,4-benzodiazepin-2-one

CAS 3900-31-0Formula C16H12ClFN2OMolar mass 302.74 g/mol
Prohibited, not for trade
Why it is not for trade
Fludiazepam chemical structure, C16H12ClFN2O, CAS 3900-31-0
2D chemical structure

Key facts

What buyers check first

All properties
CAS number
3900-31-0
Formula
C16H12ClFN2O
Molar mass
302.74 g/mol
HS code
293391
Category
Central nervous system drugs

What is Fludiazepam?

Plain description, key identifiers and synonyms

Fludiazepam is a 1,4-benzodiazepinone, an organochlorine compound and an organofluorine compound. It has a role as an anxiolytic drug. It is functionally related to a diazepam and a monofluorobenzene.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
7-chloro-5-(2-fluorophenyl)-1-methyl-3H-1,4-benzodiazepin-2-one
CAS number
3900-31-0 CAS number cross-checked
Molecular formula
C16H12ClFN2O
UNII
7F64A2K16Z
InChIKey
ROYOYTLGDLIGBX-UHFFFAOYSA-N
InChI
InChI=1S/C16H12ClFN2O/c1-20-14-7-6-10(17)8-12(14)16(19-9-15(20)21)11-4-2-3-5-13(11)18/h2-8H,9H2,1H3
SMILES (canonical and isomeric)
CN1C(=O)CN=C(C2=C1C=CC(=C2)Cl)C3=CC=CC=C3F

Synonyms

  • Erispan
  • Fludiazepamum
  • 7-Chloro-5-(o-Fluorophenyl)-1,3-dihydro-1-methyl-2H-1,4-benzodiazepin-2-one
  • 7-Chloro-5-(2-fluorophenyl)-1,3-dihydro-1-methyl-2H-1,4-benzodiazepin-2-one
  • 7-Chloro-5-(2-fluorophenyl)-1-methyl-1,3-dihydro-2H-1,4-benzodiazepin-2-one
  • 7-chloro-5-(2-fluorophenyl)-1-methyl-2,3-dihydro-1H-1,4-benzodiazepin-2-one
  • fludiazepan
  • 1-methyl-5-(2-fluorophenyl)-7-chloro-1,3-dihydro-2H-(1,4)benzodiazepin-2-one
  • 7-chloro-5-(2-fluorophenyl)-1-methyl-3H-1,4-benzodiazepin-2-one
  • Fludiazepam (1 mg/mL in Acetonitrile)
  • ID 540
  • Erispan (TN)
  • DEA No. 2759
  • 7-Chloro-5-(2-fluorophenyl)-1-methyl-1H-1,4-benzodiazepin-2(3H)-one
  • Fludiazepam (JP18/INN)
  • 2H-1,4-Benzodiazepin-2-one, 7-chloro-5-(2-fluorophenyl)-1,3-dihydro-1-methyl-
  • 2H-1,4-Benzodiazepin-2-one, 7-chloro-5-(o-fluorophenyl)-1,3-dihydro-1-methyl-
  • 5-24-04-00320 (Beilstein Handbook Reference)
  • Fludiazepam, 1mg/ml in Methanol
  • Ro-5-3438
  • 2H-1,4-Benzodiazepin-2-one, 1,3-dihydro-7-chloro-5-(o-fluorophenyl)-1-methyl-
  • 7-Chloro-5-(2-fluorophenyl)-1-methyl-1,3-dihydro-2H-1,4-benzodiazepin-2-one #

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
302.74 g/molcalc.
Exact mass
302.0622 Dacalc.
LogP (octanol/water)
3.29calc.
Topological polar surface area
32.67 Ųcalc.
Hydrogen bond donors
0calc.
Hydrogen bond acceptors
2calc.
Rotatable bonds
1calc.
Heavy atoms
21calc.
Rings
3calc.
Aromatic rings
2calc.
Fraction sp3 carbons
0.13calc.
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, O=C1CN=C(c2ccccc2)c2ccccc2N1

O=C1CN=C(c2ccccc2)c2ccccc2N1

3 rings, 18 atoms, the RO-05-2921 ring system.

540 other chemicals share this scaffold

Safety and hazards

GHS classification summary, not a safety data sheet

No GHS hazard classification is recorded for this substance yet. That does not mean it is harmless.

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

Fludiazepam suppliers

Trading restrictions apply to this substance

Psychotropic substance

Fludiazepam is prohibited on CompoundList. Listings, quotes and messages are disabled. This page is kept for information only.

Listing and enquiries are not allowed for this substance.

Reference: UN Convention on Psychotropic Substances 1971, HS 2022 subheading 2933.91 (benzodiazepines and related substances)

Our policy on controlled substances

Fludiazepam price

Indicative price range per kg from live supplier offers

Prices are not shown for prohibited substances.

Uses and applications

What the substance is used for, by industry and function

Use classes: Pharmaceuticals.

Industries and functions

Pharmacological actions

  • Anti-Anxiety Agents
  • Anticonvulsants
  • Muscle Relaxants, Central

Roles

  • anxiolytic drug
  • central nervous system depressant
  • central nervous system drug
  • pharmaceutical
  • psychotropic drug
  • tranquilizing drug

Regulatory status

Inventories, regulations and trade controls that list this substance

Psychotropic substance

Fludiazepam is prohibited on CompoundList. Listings, quotes and messages are disabled. This page is kept for information only.

Listing and enquiries are not allowed for this substance.

Reference: UN Convention on Psychotropic Substances 1971, HS 2022 subheading 2933.91 (benzodiazepines and related substances)

Our policy on controlled substances

Controls

  • US DEA controlled substance or listed chemical
  • Controlled psychotropic substance

HS code and trade data

Customs classification and reported world trade statistics

Global trade

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

HS 2933.91Exact HS code

Alprazolam (INN), camazepam (INN), chlordiazepoxide (INN), clonazepam (INN)…

World exports in 2024
$118M
−26.3% vs 2023, imports $94.2M
2019 to 2024
Top exporters
  1. Italy37.7%
  2. United States22.7%
  3. India * partner reported9.8%
Top importers
  1. Germany13.8%
  2. Spain10.4%
  3. United States10.2%

* Partner reported figures, a lower bound.

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

The HS code shown for Fludiazepam is indicative (it was matched by name in the HS nomenclature). Confirm the classification with your customs broker before shipping.

Frequently asked questions

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

What is Fludiazepam?

Fludiazepam is a 1,4-benzodiazepinone, an organochlorine compound and an organofluorine compound. It has a role as an anxiolytic drug. It is functionally related to a diazepam and a monofluorobenzene.

What is the CAS number of Fludiazepam?

The CAS registry number of Fludiazepam is 3900-31-0.

What is the molecular formula and weight of Fludiazepam?

The molecular formula of Fludiazepam is C16H12ClFN2O and its molar mass is 302.74 g/mol.

What is Fludiazepam used for?

Use classes: Pharmaceuticals.

Is Fludiazepam hazardous?

No GHS hazard classification for Fludiazepam 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 Fludiazepam?

Fludiazepam is usually classified under HS code 293391 (Alprazolam (INN), camazepam (INN), chlordiazepoxide (INN), clonazepam (INN)…). This is indicative, confirm it with your customs broker before shipping.

Can I buy Fludiazepam on CompoundList?

No. Fludiazepam is on our prohibited list, so listings, quotes and messages for it are disabled. This page is kept for information only.

Guides for buyers

Practical guides that help when you source, ship or handle Fludiazepam

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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