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Impurities and reference standards

Norflunitrazepam

Also known as Desmethylflunitrazepam, Demethylflunitrazepam, RO 5-4435

CAS 2558-30-7Formula C15H10FN3O3Molar mass 299.26 g/molEC 219-878-3
GHS signal word: Warning. Pictograms: Harmful or irritant 1 supplier listed
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Norflunitrazepam chemical structure, C15H10FN3O3, CAS 2558-30-7
2D chemical structure

Key facts

What buyers check first

All properties
CAS number
2558-30-7
Formula
C15H10FN3O3
Molar mass
299.26 g/mol
EC number
219-878-3
HS code
293379
Category
Impurities and reference standards

What is Norflunitrazepam?

Plain description, key identifiers and synonyms

Norflunitrazepam is a chemical substance with the molecular formula C15H10FN3O3 and a molar mass of 299.26 g/mol. Its CAS registry number is 2558-30-7. The IUPAC name is 5-(2-fluorophenyl)-7-nitro-1,3-dihydro-1,4-benzodiazepin-2-one.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
5-(2-fluorophenyl)-7-nitro-1,3-dihydro-1,4-benzodiazepin-2-one
CAS number
2558-30-7 CAS number cross-checked
EC number
219-878-3
Molecular formula
C15H10FN3O3
UNII
055XLQ0YQ6
InChIKey
KNGIGRDYBQPXKQ-UHFFFAOYSA-N
InChI
InChI=1S/C15H10FN3O3/c16-12-4-2-1-3-10(12)15-11-7-9(19(21)22)5-6-13(11)18-14(20)8-17-15/h1-7H,8H2,(H,18,20)
SMILES (canonical and isomeric)
C1C(=O)NC2=C(C=C(C=C2)[N+](=O)[O-])C(=N1)C3=CC=CC=C3F

Synonyms

  • Desmethylflunitrazepam
  • Demethylflunitrazepam
  • RO 5-4435
  • 2H-1,4-Benzodiazepin-2-one, 5-(2-fluorophenyl)-1,3-dihydro-7-nitro-
  • Flunitrazepan, N-desmethyl
  • 5-(2-Fluorophenyl)-7-nitro-2,3-dihydro-1H-1,4-benzodiazepin-2-one
  • Norflunitrazepam (nflis-drug)
  • Nor-Flunitrazepam
  • 5-(2-Fluorophenyl)-1,3-dihydro-7-nitro-2H-1,4-benzodiazepin-2-one
  • Fonazepam, Norflunitrazepam
  • 5-(2-fluorophenyl)-7-nitro-1,3-dihydro-1,4-benzodiazepin-2-one
  • Nor-Flunitrazepam 1.0 mg/mL in Methanol
  • 5-(2-Fluorophenyl)-7-nitro-1,3-dihydro-2H-1,4-benzodiazepin-2-one (Demethylflunitrazepam)
  • Ro-05-4435
  • Flunitrazepam EP Impurity B
  • Desmethylflunitrazepam, 1mg/ml in Methanol
  • Norflunitrazepam (N-desmethyl-flunitrazepam)
  • Desmethylflunitrazepam 0.1 mg/ml in Methanol
  • Desmethylflunitrazepam 1.0 mg/ml in Methanol
  • Flunitrazepam impurity b
  • 5-(2-fluorophenyl)-7-nitro-3H-1,4-benzodiazepin-2(1H)-one
  • 5-(2-fluorophenyl)-7-nitro-1H-benzo[e][1,4]diazepin-2(3H)-one
  • 5-(3-fluorophenyl)-7-nitro-1,3-dihydro-1,4-benzodiazepin-2-one
  • 5-(2-Fluorophenyl)-7-nitro-1,3-dihydro-2H-1,4-benzodiazepin-2-one
  • 5-(2-Fluorophenyl)-7-nitro-1,3-dihydro-2H-1,4-benzodiazepin-2-one #
Show all 26 synonyms
  • 7-nitro-1,3-dihydro-5-(2-fluorophenyl)-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
299.26 g/molcalc.
Exact mass
299.0706 Dacalc.
LogP (octanol/water)
2.52calc.
Topological polar surface area
84.6 Ųcalc.
Hydrogen bond donors
1calc.
Hydrogen bond acceptors
4calc.
Rotatable bonds
2calc.
Heavy atoms
22calc.
Rings
3calc.
Aromatic rings
2calc.
Fraction sp3 carbons
0.07calc.
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

GHS signal word
Warning
GHS07: Harmful or irritant
Harmful or irritant

Hazard statements

  • H302Harmful if swallowed.
Precautionary statements (5)
  • P264Wash skin thoroughly after handling.
  • P270Do not eat, drink or smoke when using this product.
  • P301 + P317If swallowed: Get medical help.
  • P330Rinse mouth.
  • 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

Norflunitrazepam suppliers

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Where suppliers are based

1 supplier in 1 country

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Norflunitrazepam 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

Applications are not documented for this substance yet. Suppliers often describe uses on their product pages, linked in the suppliers list above.

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 Norflunitrazepam is traded under.

HS 2933.79Indicative HS code

Lactams, other lactams

World exports in 2024
$16.2B
−64.4% vs 2023, imports $15.4B
2019 to 2024
Top exporters
  1. Ireland37.0%
  2. France * partner reported15.6%
  3. Spain11.3%
Top importers
  1. Germany27.8%
  2. Ireland18.9%
  3. Panama * partner reported12.9%

* Partner reported figures, a lower bound.

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

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

Frequently asked questions

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

What is Norflunitrazepam?

Norflunitrazepam is a chemical substance with the molecular formula C15H10FN3O3 and a molar mass of 299.26 g/mol. Its CAS registry number is 2558-30-7. The IUPAC name is 5-(2-fluorophenyl)-7-nitro-1,3-dihydro-1,4-benzodiazepin-2-one.

What is the CAS number of Norflunitrazepam?

The CAS registry number of Norflunitrazepam is 2558-30-7.

What is the molecular formula and weight of Norflunitrazepam?

The molecular formula of Norflunitrazepam is C15H10FN3O3 and its molar mass is 299.26 g/mol.

Is Norflunitrazepam hazardous?

Norflunitrazepam carries the GHS signal word "Warning". Main hazards: harmful if swallowed. This summary is not an SDS, always read the supplier safety data sheet.

What is the HS code of Norflunitrazepam?

Norflunitrazepam is usually classified under HS code 293379 (Lactams, other lactams). This is indicative, confirm it with your customs broker before shipping.

Where can I buy Norflunitrazepam?

CompoundList lists 1 supplier of Norflunitrazepam in Poland. Send one free request to get and compare quotes. Your contact details stay private until you accept a quote.

What is the price of Norflunitrazepam?

Suppliers quote Norflunitrazepam 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 Norflunitrazepam

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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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