CAS No. 110956-75-7

ACTIVITY: Herbicide (oxazolidinedione)

CAS Name: 3-[4-chloro-5-(cyclopentyloxy)-2-fluorophenyl]-5-(1-methylethylidene)-2,4-oxazolidinedione


Regulatory Information
(only comprehensive for the US)
US EPA Registered: No 
Japan Maximum Residue Levels (MRLs) Rice 
Other Information
Molecular Formula: C17H17Cl F NO4 
Entry Year: 1992 
Inventing Company: Kaken Pharmaceutical (Tokyo, Japan)
Other Names: KPP-314, Wechser 
Of special interest:
PAN Data 
Historical review of rice herbicides in Japan by Shooichi Matsunaka. Weed Biology and Management. Volume 1 Issue 1. Page 10.  2001.

Pentoxaxone (rice herbicide) is "a new oxazolidinedione compound, is known to be a Protox inhibitor and used to control annual broad leaves, barnyard grass and monocholia in paddy fields with a long lasting effect."

According to the 2nd edition of An Introduction to Herbicides (Whitacre & Ware) Oxazolidinediones- Pentoxazone (Wechser®) is the only member of the Oxazolidinedione class, at present. It is used on rice and at present only in S. Korea. It is an inhibitor of PPO.
-- Note from FAN: Pentoxazone is used in Japan.

Adverse Effects:

As of April 4, 2005: No data available

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