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Levetiracetam Impurity 31

Levetiracetam Impurity 31 Structure
Levetiracetam Impurity 31 structure
CAS No.
20496-01-9
Chemical Name:
Levetiracetam Impurity 31
Synonyms
4-chlorobutanoic anhydride;4-Chlorobutyric anhydride;Levetiracetam Impurity 31;4-chloro-n-butyric anhydride;Levetiracetam Impurity 20 (4-Chlorobutyric Anhydride);Butanoic acid, 4-chloro-, anhydride with 4-chlorobutanoic acid
CBNumber:
CB45540752
Molecular Formula:
C8H12Cl2O3
Molecular Weight:
227.08
MDL Number:
MOL File:
20496-01-9.mol
MSDS File:
SDS
Last updated:2026-05-28 05:21:37
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Levetiracetam Impurity 31 Properties

Boiling point 106-109 °C(Press: 4-5 Torr)
Density 1.234±0.06 g/cm3(Predicted)
solubility Chloroform (Slightly), Methanol (Slightly)
form Oil
color Colourless to Brown
Stability Moisture Sensitive

SAFETY

Risk and Safety Statements

Symbol(GHS)  Exclamation Mark (GHS07)
GHS07
Signal word  Warning
Hazard statements  H302-H315-H319-H335
Precautionary statements  P280-P305+P351+P338

Levetiracetam Impurity 31 price

Manufacturer Product number Product description CAS number Packaging Price Updated Buy
TRC TRC-C292955-250MG 4-Chlorobutyric anhydride 20496-01-9 250mg $256 2026-06-03 Buy
TRC TRC-C292955-2.5G 4-Chlorobutyric anhydride 20496-01-9 2.5g $1965 2026-06-03 Buy
TRC TRC-C292955-1G 4-Chlorobutyric anhydride 20496-01-9 1g $964 2026-06-03 Buy
aablocks AA01X7X8 4-Chlorobutanoic Anhydride 98% 20496-01-9 100mg $64 2026-06-01 Buy
aablocks AA01X7X8 4-Chlorobutanoic Anhydride 98% 20496-01-9 250mg $113 2026-06-01 Buy
Product number Packaging Price Buy
TRC-C292955-250MG 250mg $256 Buy
TRC-C292955-2.5G 2.5g $1965 Buy
TRC-C292955-1G 1g $964 Buy
AA01X7X8 100mg $64 Buy
AA01X7X8 250mg $113 Buy

Levetiracetam Impurity 31 Chemical Properties,Uses,Production

Uses

4-Chlorobutyric anhydride is used as a reagent in the synthesis of hypotensive (±)-oudenone.

Levetiracetam Impurity 31 Preparation Products And Raw materials

Raw materials

Preparation Products

Levetiracetam Impurity 31 Suppliers

Global( 38)Suppliers
Supplier Tel Email Country ProdList Advantage
V-Ran (Shandong) Biotechnology Co., Ltd. 0531-88516570 17753131700 236613131@qq.com China 182 58
Nanjing Chemlin Chemical Co., Ltd 025-83697070 13770331960 info@chemlin.com.cn China 16305 64
Tianjin Derchemist Science & Technology Co., Ltd. 22-58627059 13920586291 zdcomcon@126.com China 4094 50
S.Z. PhyStandard Bio-Tech. Co., Ltd. 0755-4000505016 13380397412 3001272453@qq.com China 5000 50
Quality Control Solutions Ltd. 0755-66853366 13670046396 orders@qcsrm.com China 18188 56
Shanghai YuanYe Biotechnology Co., Ltd. 15026964105 2881489226@qq.com China 89667 60
Zhengzhou Alfa Chemical Co.,Ltd +86-18530059196 sale04@alfachem.cn China 9733 58
Guangzhou Dreampharm Biotechnology Co., Ltd. 020-36607679; 13502246435 3008233746@qq.com China 9968 12
BOC Sciences +1-631-485-4226 inquiry@bocsci.com United States 19935 58
Jinan blalong chemical co. LTD 2710913286@qq.com 1513643261@qq.com China 14227 58
Supplier Advantage
V-Ran (Shandong) Biotechnology Co., Ltd. 58
Nanjing Chemlin Chemical Co., Ltd 64
Tianjin Derchemist Science & Technology Co., Ltd. 50
S.Z. PhyStandard Bio-Tech. Co., Ltd. 50
Quality Control Solutions Ltd. 56
Shanghai YuanYe Biotechnology Co., Ltd. 60
Zhengzhou Alfa Chemical Co.,Ltd 58
Guangzhou Dreampharm Biotechnology Co., Ltd. 12
BOC Sciences 58
Jinan blalong chemical co. LTD 58

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Levetiracetam Impurity 31 4-Chlorobutyric anhydride Levetiracetam Impurity 20 (4-Chlorobutyric Anhydride) Butanoic acid, 4-chloro-, anhydride with 4-chlorobutanoic acid 4-chloro-n-butyric anhydride 4-chlorobutanoic anhydride 20496-01-9