CompoundList
Sign in
Impurities and reference standards

Risperidal iMpurity B

Also known as Risperidone EP Impurity A and B(Mixture of E and Z Isomers), 3-[2-[4-[(2,4-difluorophenyl)-(hydroxyimino)-methyl]-1-piperidinyl]ethyl]-6,7,8,9-tetrahydro-2-methyl-4H-pyrido[1,2-a]pyrimidin-4-one

CAS 158697-66-6Formula C23H28F2N4O2Molar mass 430.50 g/mol
Get quotes Safety data
Risperidal iMpurity B chemical structure, C23H28F2N4O2, CAS 158697-66-6
2D chemical structure

Key facts

What buyers check first

All properties
CAS number
158697-66-6
Formula
C23H28F2N4O2
Molar mass
430.50 g/mol
HS code
293359
Category
Impurities and reference standards

What is Risperidal iMpurity B?

Plain description, key identifiers and synonyms

Risperidal iMpurity B is a chemical substance with the molecular formula C23H28F2N4O2 and a molar mass of 430.50 g/mol. Its CAS registry number is 158697-66-6. The IUPAC name is 3-[2-[4-[C-(2,4-difluorophenyl)-N-hydroxycarbonimidoyl]piperidin-1-yl]ethyl]-2-methyl-6,7,8,9-tetrahydropyrido[1,2-a]pyrimidin-4-one.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
3-[2-[4-[C-(2,4-difluorophenyl)-N-hydroxycarbonimidoyl]piperidin-1-yl]ethyl]-2-methyl-6,7,8,9-tetrahydropyrido[1,2-a]pyrimidin-4-one
CAS number
158697-66-6
Molecular formula
C23H28F2N4O2
InChIKey
BRCINVRBDDVLDW-UHFFFAOYSA-N
InChI
InChI=1S/C23H28F2N4O2/c1-15-18(23(30)29-10-3-2-4-21(29)26-15)9-13-28-11-7-16(8-12-28)22(27-31)19-6-5-17(24)14-20(19)25/h5-6,14,16,31H,2-4,7-13H2,1H3
SMILES (canonical and isomeric)
CC1=C(C(=O)N2CCCCC2=N1)CCN3CCC(CC3)C(=NO)C4=C(C=C(C=C4)F)F

Synonyms

  • Risperidone EP Impurity A and B(Mixture of E and Z Isomers)
  • 3-[2-[4-[(2,4-difluorophenyl)-(hydroxyimino)-methyl]-1-piperidinyl]ethyl]-6,7,8,9-tetrahydro-2-methyl-4H-pyrido[1,2-a]pyrimidin-4-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
430.50 g/molcalc.
Exact mass
430.218 Dacalc.
LogP (octanol/water)
3.3calc.
Topological polar surface area
70.72 Ųcalc.
Hydrogen bond donors
1calc.
Hydrogen bond acceptors
5calc.
Rotatable bonds
5calc.
Heavy atoms
31calc.
Rings
4calc.
Aromatic rings
2calc.
Fraction sp3 carbons
0.52calc.
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, N=C(c1ccccc1)C1CCN(CCc2cnc3n(c2=O)CCCC3)CC1

N=C(c1ccccc1)C1CCN(CCc2cnc3n(c2=O)CCCC3)CC1

4 rings, 27 atoms.

6 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.

Risperidal iMpurity B 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 Risperidal iMpurity B can send you quotes. Your contact details stay private until you accept a quote.

Request quotesSell this chemical

Risperidal iMpurity B 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

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 Risperidal iMpurity B is traded under.

HS 2933.59Indicative HS code

Compounds containing a pyrimidine ring (whether or not hydrogenated) or piperazine ring, other

World exports in 2024
$18.4B
+10.5% vs 2023, imports $24.8B
2019 to 2024
Top exporters
  1. Ireland43.6%
  2. Switzerland * partner reported26.3%
  3. China7.9%
Top importers
  1. Slovenia30.3%
  2. United States30.1%
  3. Germany15.3%

* Partner reported figures, a lower bound.

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

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

Frequently asked questions

Quick answers about Risperidal iMpurity B, based on the data on this page

What is Risperidal iMpurity B?

Risperidal iMpurity B is a chemical substance with the molecular formula C23H28F2N4O2 and a molar mass of 430.50 g/mol. Its CAS registry number is 158697-66-6. The IUPAC name is 3-[2-[4-[C-(2,4-difluorophenyl)-N-hydroxycarbonimidoyl]piperidin-1-yl]ethyl]-2-methyl-6,7,8,9-tetrahydropyrido[1,2-a]pyrimidin-4-one.

What is the CAS number of Risperidal iMpurity B?

The CAS registry number of Risperidal iMpurity B is 158697-66-6.

What is the molecular formula and weight of Risperidal iMpurity B?

The molecular formula of Risperidal iMpurity B is C23H28F2N4O2 and its molar mass is 430.50 g/mol.

Is Risperidal iMpurity B hazardous?

No GHS hazard classification for Risperidal iMpurity B 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 Risperidal iMpurity B?

Risperidal iMpurity B is usually classified under HS code 293359 (Compounds containing a pyrimidine ring (whether or not hydrogenated) or piperazine ring…). This is indicative, confirm it with your customs broker before shipping.

Where can I buy Risperidal iMpurity B?

Post a free request on CompoundList and suppliers of Risperidal iMpurity B will send you quotes. Your contact details stay private until you accept a quote.

What is the price of Risperidal iMpurity B?

Suppliers quote Risperidal iMpurity B 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 Risperidal iMpurity B

Get quotes for Risperidal iMpurity B

Post one free request with your grade, quantity and destination. Matching suppliers send quotes you can compare side by side.
Post a request Sell Risperidal iMpurity B
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 Risperidal iMpurity B 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/risperidal-impurity-b-158697-66-6" title="Risperidal iMpurity B 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 Impurities and reference standards or HS code 293359

Price on request
Free quotes, contact stays private
Get quotes