NITE - Chemical Management Field

Latest GHS Classification Results by the Japanese Government (edited by NITE)

GENERAL INFORMATION

Item	Information
CAS RN	16752-77-5
Chemical Name	Methomyl
Substance ID	m-nite-16752-77-5_v1
Download of Excel format	Excel file

REFERENCE INFORMATION

Item	Information
Guidance used for the classification (External link)	To Guidance List
UN GHS document (External link)	To UN GHS document
FAQ（GHS classification results by the Japanese Government）	To FAQ
List of Information Sources (Excel file)	List of Information Sources
List of Definitions/Abbreviations	Definitions/Abbreviations
Sample Label by MHLW (External link)	MHLW Website (in Japanese Only)
Sample SDS by MHLW (External link)	MHLW Website (in Japanese Only)
OECD/eChemPortal (External link)	To OECD/eChemPortal (External link)

PHYSICAL HAZARDS

Hazard class		Classification	Pictogram Signal word	Hazard statement (code)	Precautionary statement (code)	Rationale for the classification	Classification year (FY)	GHS Classification Guidance for the Japanese Government
1	Explosives	Not classified (Not applicable)	- -	-	-	There are no chemical groups associated with explosive properties present in the molecules.	FY2006	GHS Classification Manual （10 Feb, 2006）
2	Flammable gases	Not classified (Not applicable)	- -	-	-	Solid (GHS definition)	FY2006	GHS Classification Manual （10 Feb, 2006）
3	Aerosols	Not classified (Not applicable)	- -	-	-	Not aerosol products	FY2006	GHS Classification Manual （10 Feb, 2006）
4	Oxidizing gases	Not classified (Not applicable)	- -	-	-	Solid (GHS definition)	FY2006	GHS Classification Manual （10 Feb, 2006）
5	Gases under pressure	Not classified (Not applicable)	- -	-	-	Solid (GHS definition)	FY2006	GHS Classification Manual （10 Feb, 2006）
6	Flammable liquids	Not classified (Not applicable)	- -	-	-	Solid (GHS definition)	FY2006	GHS Classification Manual （10 Feb, 2006）
7	Flammable solids	Classification not possible	- -	-	-	No data available	FY2006	GHS Classification Manual （10 Feb, 2006）
8	Self-reactive substances and mixtures	Not classified (Not applicable)	- -	-	-	There are no chemical groups associated with explosive or self-reactive properties present in the molecule.	FY2006	GHS Classification Manual （10 Feb, 2006）
9	Pyrophoric liquids	Not classified (Not applicable)	- -	-	-	Solid (GHS definition)	FY2006	GHS Classification Manual （10 Feb, 2006）
10	Pyrophoric solids	Classification not possible	- -	-	-	No data available	FY2006	GHS Classification Manual （10 Feb, 2006）
11	Self-heating substances and mixtures	Classification not possible	- -	-	-	Test methods applicable to liquid or solid substances at 140degC are not available.	FY2006	GHS Classification Manual （10 Feb, 2006）
12	Substances and mixtures which, in contact with water, emit flammable gases	Not classified (Not applicable)	- -	-	-	The chemical structure of the substance does not contain metals or metaloids(B, Si, P, Ge, As, Se, Sn, Sb, Te, Bi, Po, At).	FY2006	GHS Classification Manual （10 Feb, 2006）
13	Oxidizing liquids	Not classified (Not applicable)	- -	-	-	Solid (GHS definition)	FY2006	GHS Classification Manual （10 Feb, 2006）
14	Oxidizing solids	Not classified (Not applicable)	- -	-	-	Organic compounds containing oxygen (but not chlorine and fluorine) and the oxygen is chemically bonded only to carbon and hydrogen (but not to other elements).	FY2006	GHS Classification Manual （10 Feb, 2006）
15	Organic peroxides	Not classified (Not applicable)	- -	-	-	Containing no -0-0- structure	FY2006	GHS Classification Manual （10 Feb, 2006）
16	Corrosive to metals	Classification not possible	- -	-	-	Liquid at a test temperature, 55degC. Test methods applicable to solid substances are not available.	FY2006	GHS Classification Manual （10 Feb, 2006）
17	Desensitized explosives	-	- -	-	-	-	-	-

HEALTH HAZARDS

Hazard class		Classification	Pictogram Signal word	Hazard statement (code)	Precautionary statement (code)	Rationale for the classification	Classification year (FY)	GHS Classification Guidance for the Japanese Government
1	Acute toxicity (Oral)	Category 3	Danger	H301	P301+P310 P264 P270 P321 P330 P405 P501	SPECIES: Rat (male) ENDPOINT: LD50 VALUE: 51 mg/kg REFERENCE SOURCE: Agricultural Chemicals abstracts	FY2006	GHS Classification Manual （10 Feb, 2006）
1	Acute toxicity (Dermal)	Category 4	Warning	H312	P302+P352 P362+P364 P280 P312 P321 P501	It was set as Category 4 based on rat (female) LD50 value: 1050mg/kg (Agricultural Chemicals abstracts).	FY2006	GHS Classification Manual （10 Feb, 2006）
1	Acute toxicity (Inhalation: Gases)	Not classified (Not applicable)	- -	-	-	Solid (GHS definition)	FY2006	GHS Classification Manual （10 Feb, 2006）
1	Acute toxicity (Inhalation: Vapours)	Classification not possible	- -	-	-	No data available	FY2006	GHS Classification Manual （10 Feb, 2006）
1	Acute toxicity (Inhalation: Dusts and mists)	Category 2	Danger	H330	P304+P340 P403+P233 P260 P271 P284 P310 P320 P405 P501	Based on 25% wettable powder rat (male) LC50 (1 hour) value: 1.99mg/L (4-hour equivalent 0.498mg/L), and 35.56% liquid medicine rat (female) LC50 (1 hour) value: 0.61mg/L (4-hour equivalent 0.15mg/L) (all are agricultural-chemicals abstracts), the lower value was adopted and it was set as Category 2.	FY2006	GHS Classification Manual （10 Feb, 2006）
2	Skin corrosion/irritation	Not classified	- -	-	-	Since it was judged to have no stimulativeness in the skin irritation test on rabbits (Agricultural-Chemicals abstracts), it was classified as out of Category.	FY2006	GHS Classification Manual （10 Feb, 2006）
3	Serious eye damage/eye irritation	Not classified	- -	-	-	Since change of the eye which was adapted to criteria for assessments of irritation in eye irritation tests using rabbits was not admitted (Agricultural-Chemicals abstracts), it was set as the outside of Category.	FY2006	GHS Classification Manual （10 Feb, 2006）
4	Respiratory sensitization	Classification not possible	- -	-	-	No data	FY2006	GHS Classification Manual （10 Feb, 2006）
4	Skin sensitization	Not classified	- -	-	-	Since the rate of a positivity in the Buehler method test using the guinea pigs was 0% (Agricultural Chemicals abstracts), it was put outside of the Category.	FY2006	GHS Classification Manual （10 Feb, 2006）
5	Germ cell mutagenicity	Not classified	- -	-	-	Since we found the negative results by the micronucleus examination which used the mouse marrow cells, and by the chromosomal aberration test which used the rat marrow cells, which were the in vivo mutagenicity tests using the somatic cells (Agrichemical Abstracts), we classified it as Out Of Category.	FY2006	GHS Classification Manual （10 Feb, 2006）
6	Carcinogenicity	Not classified	- -	-	-	Since it was classified into A4 (ACGIH 7th, 2001) according to ACGIH, it carried out the outside of Category.	FY2006	GHS Classification Manual （10 Feb, 2006）
7	Reproductive toxicity	Not classified	- -	-	-	Since there is no reproductive toxicity in the dose causing general toxicity to parent animals in teratogenicity test of rat and rabbit, and in the reproduction study on rat (Agricultural-Chemicals abstracts), it was considered as on the outside of Categry.	FY2006	GHS Classification Manual （10 Feb, 2006）
8	Specific target organ toxicity - Single exposure	Category 1 (nervous system)	Danger	H370	P308+P311 P260 P264 P270 P321 P405 P501	In the oral administration and inhalation exposure tests using rats, symptoms suggesting the influences on the nerve systems such as clonic convulsion, shivering, salivation etc. were observed with the given dosage of guidance value range of Category 1 (Agricultural chemical abstracts). So it was set as Category1 (nerve systems).	FY2006	GHS Classification Manual （10 Feb, 2006）
9	Specific target organ toxicity - Repeated exposure	Category 2 (nervous system, blood)	Warning	H373	P260 P314 P501	It was classified to as category 2 (nervous systems, blood) according to the symptoms which shows the effects on nervous systems such as decreased brain cholinesterase activity, tremor, aggressive behavior, and hyperreactivity, and the effects on blood systems such as decreased haemoglobin, reduction of red cell count, increased reticulocyte counts, and erythroid hyperplasia in marrow in the repeated oral test using rats were acknowledged with the given dose of the guidance value range of Category 2 (all by agricultural-chemicals abstracts).	FY2006	GHS Classification Manual （10 Feb, 2006）
10	Aspiration hazard	Classification not possible	- -	-	-	No data available	FY2006	GHS Classification Manual （10 Feb, 2006）

ENVIRONMENTAL HAZARDS

Hazard class		Classification	Pictogram Signal word	Hazard statement (code)	Precautionary statement (code)	Rationale for the classification	Classification year (FY)	GHS Classification Guidance for the Japanese Government
11	Hazardous to the aquatic environment Short term (Acute)	Category 1	Warning	H400	P273 P391 P501	It was classified into Category 1 from 48-hour EC50=0.009mg/L of Crustacea (Daphnia magna) (EHC64, 1996) .	FY2006	GHS Classification Manual （10 Feb, 2006）
11	Hazardous to the aquatic environment Long term (Chronic)	Category 1	Warning	H410	P273 P391 P501	Classified into Category 1, since acute toxicity was Category 1, supposed not rapidly degrading (BIOWIN), though supposed less bioaccumulative (log Kow=0.6(PHYSPROP Database, 2005)).	FY2006	GHS Classification Manual （10 Feb, 2006）
12	Hazardous to the ozone layer	-	- -	-	-	-	-	-

NOTE:

GHS Classification Result by the Japanese Government is intended to provide a reference for preparing a GHS label or SDS for users. To include the same classification result in a label or SDS for Japan is NOT mandatory.
Users can cite or copy this classification result when preparing a GHS label or SDS. Please be aware, however, that the responsibility for a label or SDS prepared by citing or copying this classification result lies with users.
This GHS classification was conducted based on the information sources and the guidance for classification and judgement which are described in the GHS Classification Guidance for the Japanese Government etc. Using other literature, test results etc. as evidence and including different content from this classification result in a label or SDS are allowed.
Hazard statement and precautionary statement will show by hovering the mouse cursor over a code in the column of "Hazard statement" and "Precautionary statement," respectively. In the excel file, both the codes and statements are provided.
A blank or "-" in the column of "Classification" denotes that a classification for the hazard class was not conducted in the year.
An asterisk “*” in the column of “Classification” denotes that “Not classified (or No applicable)” and/or “Classification not possible” is applicable. Details are described in the column of “Rationale for the classification”. If no English translation is available for “Rationale for the classification,” please refer to the Japanese version of the results.

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