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ChemicalBook >> CAS DataBase List >> 3-Ethyl-6,7,8,9-tetrahydro-9-hydroxy-2-Methyl-4H-pyrido[1,2-a]pyriMidin-4-one

3-Ethyl-6,7,8,9-tetrahydro-9-hydroxy-2-Methyl-4H-pyrido[1,2-a]pyriMidin-4-one

3-Ethyl-6,7,8,9-tetrahydro-9-hydroxy-2-Methyl-4H-pyrido[1,2-a]pyriMidin-4-one price.
  • $48 - $2400
  • Product name: 3-Ethyl-6,7,8,9-tetrahydro-9-hydroxy-2-Methyl-4H-pyrido[1,2-a]pyriMidin-4-one
  • CAS: 849903-79-3
  • MF: C11H16N2O2
  • MW: 208.26
  • EINECS:
  • MDL Number:MFCD18207006
  • Synonyms:4H-Pyrido[1,2-a]pyriMidin-4-one, 3-ethyl-6,7,8,9-tetrahydro-9-hydroxy-2-Methyl-;3-ethyl-9-hydroxy-2-Methyl-6,7,8,9-tetrahydro-4H-pyrido[1,2-a]pyriMidin-4-one;4H-Pyrido[1,2-a]pyriMidin...;Paliperidone Stage III (USP RC A);3-Ethyl-6,7,8,9-tetrahydro-9-hydroxy-2-methyl-4H-pyrido[1,2-a]pyrimidin-4-one;Paliperidone Related CoMpound A;Paliperidone Related Compound A (20 mg) (3-Ethyl-9-hydroxy-2-methyl-6,7,8,9-tetrahydro-4H-pyrido[1,2-alpha]pyrimidin-4-one);3-ethyl-9-hydroxy-2-methyl-6,7,8,9-tetrahydropyrido[1,2-a]pyrimidin-4-one
Price33 Properties Safety Information Description
33 prices
Selected condition：
Brand
  • aablocks
  • ACHEMBLOCK
  • AK Scientific
  • Alichem
  • Chemenu
  • ChemScene
  • Crysdot
  • Matrix Scientific
  • Synthonix
  • TRC
  • Usbiological
Package
  • 5mg
  • 20mg
  • 100mg
  • 100.00mg
  • 250mg
  • 250.00mg
  • 500mg
  • 1.00g
  • 1g
  • 5g
  • 10g
  • Manufactureraablocks
  • Product numberAA00G3JY
  • Product description3-Ethyl-9-Hydroxy-2-Methyl-6,7,8,9-Tetrahydro-4H-Pyrido[1,2-A]Pyrimidin-4-One 97%
  • Packaging100mg
  • Price$48
  • Updated2026-05-28
  • Buy
  • Manufactureraablocks
  • Product numberAA00G3JY
  • Product description3-Ethyl-9-Hydroxy-2-Methyl-6,7,8,9-Tetrahydro-4H-Pyrido[1,2-A]Pyrimidin-4-One 97%
  • Packaging250mg
  • Price$95
  • Updated2026-05-28
  • Buy
  • Manufactureraablocks
  • Product numberAA00G3JY
  • Product description3-Ethyl-9-Hydroxy-2-Methyl-6,7,8,9-Tetrahydro-4H-Pyrido[1,2-A]Pyrimidin-4-One 95%
  • Packaging500mg
  • Price$171
  • Updated2026-05-28
  • Buy
  • Manufactureraablocks
  • Product numberAA00G3JY
  • Product description3-Ethyl-9-Hydroxy-2-Methyl-6,7,8,9-Tetrahydro-4H-Pyrido[1,2-A]Pyrimidin-4-One 95%
  • Packaging1g
  • Price$273
  • Updated2026-05-28
  • Buy
  • Manufactureraablocks
  • Product numberAA00G3JY
  • Product description3-Ethyl-9-Hydroxy-2-Methyl-6,7,8,9-Tetrahydro-4H-Pyrido[1,2-A]Pyrimidin-4-One 95%
  • Packaging5g
  • Price$817
  • Updated2026-05-28
  • Buy
  • Manufactureraablocks
  • Product numberAA00G3JY
  • Product description3-Ethyl-9-Hydroxy-2-Methyl-6,7,8,9-Tetrahydro-4H-Pyrido[1,2-A]Pyrimidin-4-One 95%
  • Packaging10g
  • Price$1311
  • Updated2026-05-28
  • Buy
  • ManufacturerACHEMBLOCK
  • Product numberG-5899
  • Product description3-ethyl-9-hydroxy-2-methyl-6,7,8,9-tetrahydro-4H-pyrido[1,2-a]pyrimidin-4-one 97%
  • Packaging5G
  • Price$1080
  • Updated2026-05-27
  • Buy
  • ManufacturerACHEMBLOCK
  • Product numberG-5899
  • Product description3-ethyl-9-hydroxy-2-methyl-6,7,8,9-tetrahydro-4H-pyrido[1,2-a]pyrimidin-4-one 97%
  • Packaging250MG
  • Price$135
  • Updated2026-05-27
  • Buy
  • ManufacturerACHEMBLOCK
  • Product numberG-5899
  • Product description3-ethyl-9-hydroxy-2-methyl-6,7,8,9-tetrahydro-4H-pyrido[1,2-a]pyrimidin-4-one 97%
  • Packaging1G
  • Price$360
  • Updated2026-05-27
  • Buy
  • ManufacturerAK Scientific
  • Product number3240AH
  • Product description3-Ethyl-6,7,8,9-tetrahydro-9-hydroxy-2-methyl-4H-pyrido[1,2-A]pyrimidin-4-one
  • Packaging1g
  • Price$1524
  • Updated2021-12-16
  • Buy
  • ManufacturerAlichem
  • Product number849903793
  • Product description3-Ethyl-9-hydroxy-2-methyl-6,7,8,9-tetrahydro-4H-pyrido[1,2-a]pyrimidin-4-one
  • Packaging1g
  • Price$669.5
  • Updated2021-12-16
  • Buy
  • ManufacturerAlichem
  • Product number849903793
  • Product description3-Ethyl-9-hydroxy-2-methyl-6,7,8,9-tetrahydro-4H-pyrido[1,2-a]pyrimidin-4-one
  • Packaging5g
  • Price$2229.5
  • Updated2021-12-16
  • Buy
  • ManufacturerAlichem
  • Product number849903793
  • Product description3-Ethyl-9-hydroxy-2-methyl-6,7,8,9-tetrahydro-4H-pyrido[1,2-a]pyrimidin-4-one
  • Packaging250mg
  • Price$262.6
  • Updated2021-12-16
  • Buy
  • ManufacturerChemenu
  • Product numberCM108719
  • Product description3-ethyl-9-hydroxy-2-methyl-4H,6H,7H,8H,9H-pyrido[1,2-a]pyrimidin-4-one 97%
  • Packaging250mg
  • Price$273
  • Updated2026-05-20
  • Buy
  • ManufacturerChemenu
  • Product numberCM108719
  • Product description3-ethyl-9-hydroxy-2-methyl-4H,6H,7H,8H,9H-pyrido[1,2-a]pyrimidin-4-one 97%
  • Packaging250mg
  • Price$273
  • Updated2026-05-26
  • Buy
  • ManufacturerChemenu
  • Product numberCM108719
  • Product description3-ethyl-9-hydroxy-2-methyl-4H,6H,7H,8H,9H-pyrido[1,2-a]pyrimidin-4-one 97%
  • Packaging1g
  • Price$428
  • Updated2026-05-20
  • Buy
Manufacturer Product number Product description Packaging Price Updated Buy
aablocks AA00G3JY 3-Ethyl-9-Hydroxy-2-Methyl-6,7,8,9-Tetrahydro-4H-Pyrido[1,2-A]Pyrimidin-4-One 97% 100mg $48 2026-05-28 Buy
aablocks AA00G3JY 3-Ethyl-9-Hydroxy-2-Methyl-6,7,8,9-Tetrahydro-4H-Pyrido[1,2-A]Pyrimidin-4-One 97% 250mg $95 2026-05-28 Buy
aablocks AA00G3JY 3-Ethyl-9-Hydroxy-2-Methyl-6,7,8,9-Tetrahydro-4H-Pyrido[1,2-A]Pyrimidin-4-One 95% 500mg $171 2026-05-28 Buy
aablocks AA00G3JY 3-Ethyl-9-Hydroxy-2-Methyl-6,7,8,9-Tetrahydro-4H-Pyrido[1,2-A]Pyrimidin-4-One 95% 1g $273 2026-05-28 Buy
aablocks AA00G3JY 3-Ethyl-9-Hydroxy-2-Methyl-6,7,8,9-Tetrahydro-4H-Pyrido[1,2-A]Pyrimidin-4-One 95% 5g $817 2026-05-28 Buy
aablocks AA00G3JY 3-Ethyl-9-Hydroxy-2-Methyl-6,7,8,9-Tetrahydro-4H-Pyrido[1,2-A]Pyrimidin-4-One 95% 10g $1311 2026-05-28 Buy
ACHEMBLOCK G-5899 3-ethyl-9-hydroxy-2-methyl-6,7,8,9-tetrahydro-4H-pyrido[1,2-a]pyrimidin-4-one 97% 5G $1080 2026-05-27 Buy
ACHEMBLOCK G-5899 3-ethyl-9-hydroxy-2-methyl-6,7,8,9-tetrahydro-4H-pyrido[1,2-a]pyrimidin-4-one 97% 250MG $135 2026-05-27 Buy
ACHEMBLOCK G-5899 3-ethyl-9-hydroxy-2-methyl-6,7,8,9-tetrahydro-4H-pyrido[1,2-a]pyrimidin-4-one 97% 1G $360 2026-05-27 Buy
AK Scientific 3240AH 3-Ethyl-6,7,8,9-tetrahydro-9-hydroxy-2-methyl-4H-pyrido[1,2-A]pyrimidin-4-one 1g $1524 2021-12-16 Buy
Alichem 849903793 3-Ethyl-9-hydroxy-2-methyl-6,7,8,9-tetrahydro-4H-pyrido[1,2-a]pyrimidin-4-one 1g $669.5 2021-12-16 Buy
Alichem 849903793 3-Ethyl-9-hydroxy-2-methyl-6,7,8,9-tetrahydro-4H-pyrido[1,2-a]pyrimidin-4-one 5g $2229.5 2021-12-16 Buy
Alichem 849903793 3-Ethyl-9-hydroxy-2-methyl-6,7,8,9-tetrahydro-4H-pyrido[1,2-a]pyrimidin-4-one 250mg $262.6 2021-12-16 Buy
Chemenu CM108719 3-ethyl-9-hydroxy-2-methyl-4H,6H,7H,8H,9H-pyrido[1,2-a]pyrimidin-4-one 97% 250mg $273 2026-05-20 Buy
Chemenu CM108719 3-ethyl-9-hydroxy-2-methyl-4H,6H,7H,8H,9H-pyrido[1,2-a]pyrimidin-4-one 97% 250mg $273 2026-05-26 Buy
Chemenu CM108719 3-ethyl-9-hydroxy-2-methyl-4H,6H,7H,8H,9H-pyrido[1,2-a]pyrimidin-4-one 97% 1g $428 2026-05-20 Buy
Next Last

Properties

Boiling point :349.0±44.0 °C(Predicted)
Density :1.29±0.1 g/cm3(Predicted)
storage temp. :2-8°C
solubility :DMSO (Slightly), Methanol (Slightly)
form :Solid
pka :13.01±0.60(Predicted)
color :White to Off-White
Major Application :pharmaceutical (small molecule)
InChI :1S/C11H16N2O2/c1-3-8-7(2)12-10-9(14)5-4-6-13(10)11(8)15/h9,14H,3-6H2,1-2H3
InChIKey :MTOYCHPCXMAGDI-UHFFFAOYSA-N
SMILES :[n]21c(nc(c([c]2=O)CC)C)C(CCC1)O

Safety Information

Symbol(GHS): Exclamation Mark (GHS07)
Signal word: warning
Hazard statements:
Code Hazard statements Hazard class Category Signal word Pictogram P-Codes
H302 Harmful if swallowed Acute toxicity,oral Category 4 Warning P264, P270, P301+P312, P330, P501
H315 Causes skin irritation Skin corrosion/irritation Category 2 Warning P264, P280, P302+P352, P321,P332+P313, P362
H319 Causes serious eye irritation Serious eye damage/eye irritation Category 2A Warning P264, P280, P305+P351+P338,P337+P313P
H335 May cause respiratory irritation Specific target organ toxicity, single exposure;Respiratory tract irritation Category 3 Warning
Precautionary statements:
P261 Avoid breathing dust/fume/gas/mist/vapours/spray.
P264 Wash hands thoroughly after handling.
P264 Wash skin thouroughly after handling.
P270 Do not eat, drink or smoke when using this product.
P271 Use only outdoors or in a well-ventilated area.
P280 Wear protective gloves/protective clothing/eye protection/face protection.
P301+P312 IF SWALLOWED: call a POISON CENTER or doctor/physician IF you feel unwell.
P302+P352 IF ON SKIN: wash with plenty of soap and water.
P304+P340 IF INHALED: Remove victim to fresh air and Keep at rest in a position comfortable for breathing.
P305+P351+P338 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.
P312 Call a POISON CENTER or doctor/physician if you feel unwell.
P321 Specific treatment (see … on this label).
P330 Rinse mouth.
P332+P313 IF SKIN irritation occurs: Get medical advice/attention.
P337+P313 IF eye irritation persists: Get medical advice/attention.
P362 Take off contaminated clothing and wash before reuse.
P403+P233 Store in a well-ventilated place. Keep container tightly closed.
P405 Store locked up.
P501 Dispose of contents/container to..…

Description

3-Ethyl-6,7,8,9-tetrahydro-9-hydroxy-2-methyl-4H-pyrido[1,2-a]pyrimidin-4-one (Paliperidone USP Related Compound A) is used in the synthesis of Paliperidone (P141000). Intermediate.

More related product prices

3-(2-Chloroethyl)-6,7,8,9-tetrahydro-9-hydroxy-2-methyl-4H-pyrido[1,2-a]pyrimidin-4-one 1020719-55-4 Paliperidone (R)-9-Hydroxy Risperidone 84163-13-3 3-(2-Hydroxyethyl)-9-hydroxy-2-Methyl-4H-pyrido[1,2-a]pyriMidin-4-one (S)-9-Hydroxy Risperidone 5-Fluoro Paliperidone 9-Benxyloxy-3-(2-Chloro ethyl)-2-methyl pyrido[1,2-a]pyrimidine-4-one

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Suppliers and manufacturers

Standardpharm Co. Ltd.
Guangzhou Yuheng Pharmaceutical Technology Co., Ltd
Career Henan Chemica Co
Hangzhou Huarong Pharm Co., Ltd.
sgtlifesciences pvt ltd
Hefei TNJ Chemical Industry Co.,Ltd.
Hunan Jibang Biological Technology Co., LTD
Aladdin Scientific
Moxin Chemicals
Chongqing Chemdad Co., Ltd