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Inert Ingredients - Reassessment Decision Documents: M

This table lists completed inert ingredient tolerance reassessment decision documents. A decision document includes the risk assessment and the decision memorandum. Some documents pertain to more than one chemical.

The list of inert ingredients used in food and non-food pesticide products is available in our InertFinder.

Specific questions or accessibility issues on the following decision documents should be forwarded to PV Shah ( of the Inert Ingredient Assessment Branch.

Inert Ingredient1 CAS Reg. No. and Name2 Decision Document3 Reassessed Date4 CFR Citation5
2-methyl-2,4-pentanediol 107-41-5
2,4-pentanediol, 2-methyl
Decision Document 11/08/2005 180.920
2-Methyl-4-isothiazolin-3-one(in combination with 5-chloro-2-methyl-4-isothiazolin-3-one) 2682-20-4
3(2H)-Isothiazolone, 2-methyl-
Decision Document 1/19/2005 180.920
N-methylpyrrolidone 872-50-4
2-Pyrrolidinone, 1-methyl
Decision Document 6/1/2006 180.920
Magnesium Nitrate 10377-60-3
Magnesium nitrate

Magnesium nitrate hexahydrate
Decision Document 2/2/2006
Maleic Acid 110-16-7
Maleic acid/2-Butenedioic acid (Z)-
Decision Document 7/17/2006 180.920
Maleic Anhydride 108-31-6
Maleic anhydride/2,5-Furandione
Decision Document 7/17/2006 180.920
Mesityl Oxide 141-79-7
3-Penten-2-one, 4-methyl-
Decision Document 5/17/2006 180.920
Methyl Alcohol 67-56-1 Decision Document 8/15/2006 180.910
Methyl n-Amyl Ketone 110-43-0
Decision Document 7/25/2006 180.910
Methyl Ethyl Ketone 78-93-3
Decision Document 7/25/2006 180.920
Methyl Isobutyl Ketone 108-10-1
2-Pentanone, 4-methyl-
Decision Document 7/25/2006 180.910
Methyl esters of fatty acids derived from edible fats and oils 67762-38-3
Fatty acids, C16-18 and C18- unsatd, Me esters
Decision Document 6/01/2006 180.920
Methyl esters of higher fatty acids conforming to 21 CFR 573.640 67254-79-9
Fatty acids
Decision Document 6/01/2006 180.910
Methyl p-Hydroxybenzoate 99-76-3
Benzoic acid, 4-hydroxy-,methyl,methyl ester
Decision Document 9/14/2005 180.920
Methyl oleate 112-62-9
9-Octadecenoic acid ((Z)-, methyl ester
Decision Document 6/01/2006 180.920
Methylated silicones See Table 1 in Decision Document Decision Document 6/01/2006 180.910
Mineral Oil, U.S.P., or conforming to 21 CFR 172.878 or 178.3620(a) 8012-95-1
Hydrocarbon oils
Decision Document 6/01/2006 180.910
Mono and Dialkyl (C8-C18) Methylated Ammonium Chloride Compounds See Appendix A in Decision Document Decision Document 8/01/2006 180.910

The content of each column in the Tolerance Reassessment Status table is described below:

Inert Ingredient

The inert ingredient’s name as it appears in the Code of Federal Regulations (CFR).

CAS Reg. No. and Name

The inert ingredient’s CAS Registry Number is the unique identification number that the Chemical Abstracts Service (CAS) has assigned to the chemical substance.

Chemical substances often have multiple names. In addition to the inert ingredient’s name that appears in the CFR, EPA utilizes the CAS 9th Collective Index Name, which is the systematic chemical name associated with the CAS Registry Number.

Decision Documents

Reassessment decision documents for each inert ingredient are provided here. A decision document includes the risk assessments and the decision memo. Please note that several inert ingredients may be grouped in a document.

Reassessed Date

The date the decision memo was signed and the inert ingredient completed tolerance reassessment.

CFR Citations

How each inert ingredient may be legally used in food-use pesticide products is described in the Code of Federal Regulations (CFR). Up-to-date CFR citations are found at U.S. Government Printing Office website.

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