Risperidone E-oxime

Also known as: Risperidone EP Impurity A, Risperidone EP Impurity A E-form, Risperidone Impurity A, Risperidone E-Oxime Impurity, 3-[2-[4-[(E)-(2,4-Difluorophenyl)(hydroxyimino)methyl]-1-piperidinyl]ethyl]-2-methyl-6,7,8,9-tetrahydro-4H-pyrido[1,2-a]pyrimidin-4-one, 3-[2-[4-[(E)-C-(2,4-difluorophenyl)-N-hydroxycarbonimidoyl]piperidin-1-yl]ethyl]-2-methyl-6,7,8,9-tetrahydropyrido[1,2-a]pyrimidin-4-one, 4H-Pyrido[1,2-a]pyrimidin-4-one, 3-[2-[4-[(E)-(2,4-difluorophenyl)(hydroxyimino)methyl]-1-piperidinyl]ethyl]-6,7,8,9-tetrahydro-2-methyl-, Risperidone Impurity 7 (Risperidone EP Impurity A)

Risperidone E-oxime (CAS 691007-09-7) is a compound in the Ketones category listed in the Jingsj chemical database. It has the molecular formula C23H28F2N4O2 and a molecular weight of 430.491 g/mol. Key properties include a boiling point of 569.0±60.0 °C at 760 mmHg, a density of 1.3±0.1 g/cm3 and a flash point of 297.9±32.9 °C. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 691007-09-7
Jingsj CID: J-1969609-4
Molecular Formula: C₂₃H₂₈F₂N₄O₂
Molecular Weight: 430.491 g/mol
Category: Ketones
Last updated: 8/21/2026

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Physicochemical Properties

Boiling Point	569.0±60.0 °C at 760 mmHg
Density	1.3±0.1 g/cm3
Flash Point	297.9±32.9 °C
Exact Mass	430.218048
PSA	79.68000
LogP	3.16
Vapor Pressure	0.0±1.6 mmHg at 25°C
Refractive Index	1.631
Storage Conditions	2-8℃

Activity & Biological Data

Additional Information	[1]. Pavel Slanina, et al. Process for making risperidone and intermediates therefor. US20040097523A1. [2]. Nyberg S, et al. 5-HT2 and D2 dopamine receptor occupancy in the living human brain. A PET study with risperidone. Psychopharmacology (Berl). 1993;110(3):265-72. [3]. Zhu HJ, et al. Risperidone and paliperidone inhibit p-glycoprotein activity in vitro. Neuropsychopharmacology. 2007 Apr;32(4):757-64.

Additional Information

[1]. Pavel Slanina, et al. Process for making risperidone and intermediates therefor. US20040097523A1. [2]. Nyberg S, et al. 5-HT2 and D2 dopamine receptor occupancy in the living human brain. A PET study with risperidone. Psychopharmacology (Berl). 1993;110(3):265-72. [3]. Zhu HJ, et al. Risperidone and paliperidone inhibit p-glycoprotein activity in vitro. Neuropsychopharmacology. 2007 Apr;32(4):757-64.

Frequently Asked Questions

What is the CAS number of Risperidone E-oxime?

The CAS number of Risperidone E-oxime is 691007-09-7.

What are the molecular formula and molecular weight of Risperidone E-oxime?

Risperidone E-oxime has molecular formula C23H28F2N4O2 and molecular weight 430.491 g/mol.

What are the upstream and downstream products of Risperidone E-oxime?

For Risperidone E-oxime, Downstream Products: Risperidone.

Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.

Last updated: 8/21/2026

How to cite: Jingsj. "Risperidone E-oxime (CAS 691007-09-7)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1969609-4 (accessed 2026-11-09).

Data for reference only; verify product details with suppliers before purchase.