NITE - Chemical Management Field

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

GENERAL INFORMATION

Item	Information
CAS RN	544-97-8
Chemical Name	Dimethylzinc
Substance ID	m-nite-544-97-8_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)	To Workplace Safety Site (MHLW)
Sample SDS by MHLW (External link)	To Workplace Safety Site (MHLW)
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 molecule.	FY2011	GHS Classification Guidance by the Japanese Government （July, 2010）
2	Flammable gases	Not classified (Not applicable)	- -	-	-	"Liquids" according to GHS definition.	FY2011	GHS Classification Guidance by the Japanese Government （July, 2010）
3	Aerosols	Not classified (Not applicable)	- -	-	-	Not an aerosol product.	FY2011	GHS Classification Guidance by the Japanese Government （July, 2010）
4	Oxidizing gases	Not classified (Not applicable)	- -	-	-	"Liquids" according to GHS definition.	FY2011	GHS Classification Guidance by the Japanese Government （July, 2010）
5	Gases under pressure	Not classified (Not applicable)	- -	-	-	"Liquids" according to GHS definition.	FY2011	GHS Classification Guidance by the Japanese Government （July, 2010）
6	Flammable liquids	Category 2	Danger	H225	P303+P361+P353 P370+P378 P403+P235 P210 P233 P240 P241 P242 P243 P280 P501	A flash point of < 23 degrees C in a prescribed closed-cup test method is estimated from -1 degrees C [unkown] (Lange (16th, 2005)) in an unknown test method, and an initial boiling point of 46 degrees C (Merck (14th, 2006)) is > 35 degrees C, therefore, it corresponds to Category 2.	FY2011	GHS Classification Guidance by the Japanese Government （July, 2010）
7	Flammable solids	Not classified (Not applicable)	- -	-	-	"Liquids" according to GHS definition.	FY2011	GHS Classification Guidance by the Japanese Government （July, 2010）
8	Self-reactive substances and mixtures	Not classified (Not applicable)	- -	-	-	Containing neither chemical groups related to explosibility nor those related to self-reactivity.	FY2011	GHS Classification Guidance by the Japanese Government （July, 2010）
9	Pyrophoric liquids	Category 1	Danger	H250	P231+P232 P302+P334 P370+P378 P210 P222 P233 P280	From an autoignition temperature of < -17.8 (below 0 degrees F) (HSDB (2008)), it was classified in Category 1. Besides, it was formerly classified in class 4.2 subsidiary risk 4.3PGI in UNRTDG (UN1370: dimethyl zinc), but it is now classified in class 4.2 subsidiary risk 4.3PGI in UNRTDG (UN3394: organometallic substance, liquid, pyrophoric, water-reactive) (IMDGAmdt.33-06 (2006)).	FY2011	GHS Classification Guidance by the Japanese Government （July, 2010）
10	Pyrophoric solids	Not classified (Not applicable)	- -	-	-	"Liquids" according to GHS definition.	FY2011	GHS Classification Guidance by the Japanese Government （July, 2010）
11	Self-heating substances and mixtures	Not classified (Not applicable)	- -	-	-	It is classified as a pyrophoric liquids.	FY2011	GHS Classification Guidance by the Japanese Government （July, 2010）
12	Substances and mixtures which, in contact with water, emit flammable gases	Classification not possible	- -	-	-	From information that it reacts violently with water, evolving methane (HSDB (2008)) and that it is classified in class 4.2 subsidiary risk 4.3PGI in UNRTDG (UN3394: organometallic substance, liquid, pyrophoric, water-reactive) (formerly classified in class 4.2 subsidiary risk 4.3PGI (UN1370: dimethyl zinc)) (IMDGAmdt.33-06 (2006)), it is classified as "substance and mixtures which, in contact with water, emit flammable gases", but the sub-categorization is not possible due to subsidiary risk 4.3.	FY2011	GHS Classification Guidance by the Japanese Government （July, 2010）
13	Oxidizing liquids	Not classified (Not applicable)	- -	-	-	An organic compound that does not contain oxygen, fluorine, or chlorine.	FY2011	GHS Classification Guidance by the Japanese Government （July, 2010）
14	Oxidizing solids	Not classified (Not applicable)	- -	-	-	"Liquids" according to GHS definition.	FY2011	GHS Classification Guidance by the Japanese Government （July, 2010）
15	Organic peroxides	Not classified (Not applicable)	- -	-	-	An organic compound that does not contain -O-O- structure.	FY2011	GHS Classification Guidance by the Japanese Government （July, 2010）
16	Corrosive to metals	Classification not possible	- -	-	-	No established test method suitable for liquid substances with a low boiling point.	FY2011	GHS Classification Guidance by the Japanese Government （July, 2010）
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)	Classification not possible	- -	-	-	No data. Besides, refer to health hazards of zinc oxide (CAS No.1314-13-2) and methane (CAS No.74-82-8) because this substance reacts readily with air or water to form zinc oxide and methane.	FY2011	GHS Classification Guidance by the Japanese Government （July, 2010）
1	Acute toxicity (Dermal)	Classification not possible	- -	-	-	No data.	FY2011	GHS Classification Guidance by the Japanese Government （July, 2010）
1	Acute toxicity (Inhalation: Gases)	Not classified (Not applicable)	- -	-	-	"Liquids" according to GHS definition.	FY2011	GHS Classification Guidance by the Japanese Government （July, 2010）
1	Acute toxicity (Inhalation: Vapours)	Classification not possible	- -	-	-	No data.	FY2011	GHS Classification Guidance by the Japanese Government （July, 2010）
1	Acute toxicity (Inhalation: Dusts and mists)	Classification not possible	- -	-	-	No data.	FY2011	GHS Classification Guidance by the Japanese Government （July, 2010）
2	Skin corrosion/irritation	Category 1	Danger	H314	P301+P330+P331 P303+P361+P353 P305+P351+P338 P304+P340 P260 P264 P280 P310 P321 P363 P405 P501	On the basis of the information that "Skin will undergo thermal and acid burns when chemical reacts with moisture in skin. Unless washed quickly, skin may be scarred" (HSDB (2008)) and on the basis of C; R34 in EU Classification (EC-JRC (ESIS) (Access on July. 2011)), it was classified in Category 1.	FY2011	GHS Classification Guidance by the Japanese Government （July, 2010）
3	Serious eye damage/eye irritation	Category 1	Danger	H318	P305+P351+P338 P280 P310	On the basis of the information that "Eyes are immediately & severely irritated by liq, vapor, or dilute soln. If not removed by thorough flushing with water, chemical may permanently damage cornea" (HSDB (2008)) and on the basis of classification "skin corrosive substances" in skin corrosion/irritation, it was classified in Category 1.	FY2011	GHS Classification Guidance by the Japanese Government （July, 2010）
4	Respiratory sensitization	Classification not possible	- -	-	-	No data.	FY2011	GHS Classification Guidance by the Japanese Government （July, 2010）
4	Skin sensitization	Classification not possible	- -	-	-	No data.	FY2011	GHS Classification Guidance by the Japanese Government （July, 2010）
5	Germ cell mutagenicity	Classification not possible	- -	-	-	No data.	FY2011	GHS Classification Guidance by the Japanese Government （July, 2010）
6	Carcinogenicity	Classification not possible	- -	-	-	No data.	FY2011	GHS Classification Guidance by the Japanese Government （July, 2010）
7	Reproductive toxicity	Classification not possible	- -	-	-	No data.	FY2011	GHS Classification Guidance by the Japanese Government （July, 2010）
8	Specific target organ toxicity - Single exposure	Category 3 (Respiratory tract irritation)	Warning	H335	P304+P340 P403+P233 P261 P271 P312 P405 P501	On the basis of the information that "Inhalation of mist or vapor causes immediate irritation of upper resp tract", it was classified in Category 3 (respiratory tract irritation). Besides, the information that "Ingestion would cause immediate burns at site of contact. Nausea, vomiting, cramps, and diarrhea may follow" (HSDB (2008)) was not used as a basis for classification due to local effects by irritation.	FY2011	GHS Classification Guidance by the Japanese Government （July, 2010）
9	Specific target organ toxicity - Repeated exposure	Classification not possible	- -	-	-	Lack of data. Besides, there is information that "excessive or prolonged inhalation of fumes from ignition or decomp may cause ‘metal fume fever’ (sore throat, headache, fever, chills, nausea, vomiting, muscular aches, perspiration, constricting sensation in lung, weakness, prostration)" (HSDB (2008)).	FY2011	GHS Classification Guidance by the Japanese Government （July, 2010）
10	Aspiration hazard	Classification not possible	- -	-	-	No data.	FY2011	GHS Classification Guidance by the Japanese Government （July, 2010）

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)	Classification not possible	- -	-	-	No data.	FY2011	GHS Classification Guidance by the Japanese Government （July, 2010）
11	Hazardous to the aquatic environment Long term (Chronic)	Classification not possible	- -	-	-	No data.	FY2011	GHS Classification Guidance by the Japanese Government （July, 2010）
12	Hazardous to the ozone layer	Classification not possible	- -	-	-	This substance is not listed in Annexes to the Montreal Protocol.	FY2011	GHS Classification Guidance by the Japanese Government （July, 2010）

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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