NITE - Chemical Management Field

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

GENERAL INFORMATION

Item	Information
CAS RN	513-35-9
Chemical Name	2-Methyl-2-butene
Substance ID	m-nite-513-35-9_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 molecules.	FY2009	GHS Classification Guidance by the Japanese Government （March, 2009）
2	Flammable gases	Not classified (Not applicable)	- -	-	-	Liquid (GHS definition)	FY2009	GHS Classification Guidance by the Japanese Government （March, 2009）
3	Aerosols	Not classified (Not applicable)	- -	-	-	Not aerosol products.	FY2009	GHS Classification Guidance by the Japanese Government （March, 2009）
4	Oxidizing gases	Not classified (Not applicable)	- -	-	-	Liquid (GHS definition)	FY2009	GHS Classification Guidance by the Japanese Government （March, 2009）
5	Gases under pressure	Not classified (Not applicable)	- -	-	-	Liquid (GHS definition)	FY2009	GHS Classification Guidance by the Japanese Government （March, 2009）
6	Flammable liquids	Category 2	Danger	H225	P303+P361+P353 P370+P378 P403+P235 P210 P233 P240 P241 P242 P243 P280 P501	Classified into Category 2 since flash point -45 degC (closed-cup) (IUCLID (2000)) is <23 degC and initial boiling point 38.56 degC (Lide (88th, 2008)) is >35 degC. The substance is classified into Class 3, PG II in UNRTDG (UN2460).	FY2009	GHS Classification Guidance by the Japanese Government （March, 2009）
7	Flammable solids	Not classified (Not applicable)	- -	-	-	Liquid (GHS definition)	FY2009	GHS Classification Guidance by the Japanese Government （March, 2009）
8	Self-reactive substances and mixtures	Type G	- -	-	-	Classified into Type G since the substance is considered not to fall into upper Division 4.1 "Self-reactive substances and mixtures" from which it contains a stabilizer (p-tert- Butylcatechol (SIDS (2004)) and is classified into Class 3, PG II in UNRTDG (UN2460) though there are chemical groups (unsaturated bond) present in the molecule associated with self-reactive properties.	FY2009	GHS Classification Guidance by the Japanese Government （March, 2009）
9	Pyrophoric liquids	Not classified	- -	-	-	Auto-ignition point is 275 degC (Lange (16th, 2005)) exceeding 70 degC.	FY2009	GHS Classification Guidance by the Japanese Government （March, 2009）
10	Pyrophoric solids	Not classified (Not applicable)	- -	-	-	Liquid (GHS definition)	FY2009	GHS Classification Guidance by the Japanese Government （March, 2009）
11	Self-heating substances and mixtures	Classification not possible	- -	-	-	Test methods applicable to liquid substances are not available.	FY2009	GHS Classification Guidance by the Japanese Government （March, 2009）
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 metalloids (B, Si, P, Ge, As, Se, Sn, Sb, Te, Bi, Po, At).	FY2009	GHS Classification Guidance by the Japanese Government （March, 2009）
13	Oxidizing liquids	Not classified (Not applicable)	- -	-	-	Organic compounds containing no oxygen, fluorine or chlorine	FY2009	GHS Classification Guidance by the Japanese Government （March, 2009）
14	Oxidizing solids	Not classified (Not applicable)	- -	-	-	Liquid (GHS definition)	FY2009	GHS Classification Guidance by the Japanese Government （March, 2009）
15	Organic peroxides	Not classified (Not applicable)	- -	-	-	Organic compounds containing no bivalent -O-O- structure	FY2009	GHS Classification Guidance by the Japanese Government （March, 2009）
16	Corrosive to metals	Classification not possible	- -	-	-	Test methods applicable to liquid (low boiling point) substances are not available.	FY2009	GHS Classification Guidance by the Japanese Government （March, 2009）
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 4	Warning	H302	P301+P312 P264 P270 P330 P501	Based on a LD50 value of 1000 - 1700 mg/kg for rats (GLP) (SIDS (2004)), the substance was classified into Category 4.	FY2009	GHS Classification Guidance by the Japanese Government （March, 2009）
1	Acute toxicity (Dermal)	Not classified	- -	-	-	Based on a LD50 value of >2000 mg/kg bw for rats (GLP) (SIDS (2004)), the substance was classified as "Not classified" in JIS Classification (correspond to Category 5 or "Not classified" in GHS classification).	FY2009	GHS Classification Guidance by the Japanese Government （March, 2009）
1	Acute toxicity (Inhalation: Gases)	Not classified (Not applicable)	- -	-	-	Liquid (GHS definition)	FY2009	GHS Classification Guidance by the Japanese Government （March, 2009）
1	Acute toxicity (Inhalation: Vapours)	Not classified	- -	-	-	Based on a LC50 value of >61000 ppm/4h (6.1% (v/v) (175 mg/L) for rats (GLP) (SIDS (2004)), the substance was classified as "Not classified". Since saturated vapour pressure concentration is 605,263 ppm, the test was considered to be conducted for vapour with almost no included mists and classification criteria for gas was adopted.	FY2009	GHS Classification Guidance by the Japanese Government （March, 2009）
1	Acute toxicity (Inhalation: Dusts and mists)	Classification not possible	- -	-	-	No data available.	FY2009	GHS Classification Guidance by the Japanese Government （March, 2009）
2	Skin corrosion/irritation	Not classified	- -	-	-	Based on a result of "slightly irritating" with PDII (1.79) in a rabbit Draize test (GLP) where 0.5 mL of the substance was applied to the skin for 24-hour (SIDS (2004)), the substance was classified as "Not classified" in JIS Classification (correspond to Category 3 in GHS classification).	FY2009	GHS Classification Guidance by the Japanese Government （March, 2009）
3	Serious eye damage/eye irritation	Not classified	- -	-	-	Based on a result of "not irritating" with Draize score of 0 at 24, 48 and 72-hour after application in a rabbit eye irritation test (GLP) (SIDS (2004)), the substance was classified as "Not classified".	FY2009	GHS Classification Guidance by the Japanese Government （March, 2009）
4	Respiratory sensitization	Classification not possible	- -	-	-	No data available.	FY2009	GHS Classification Guidance by the Japanese Government （March, 2009）
4	Skin sensitization	Not classified	- -	-	-	Based on a result of not sensitizing (positive ratio: 0%, 0/20 animals) in a guinea pig maximization test (GLP) (SIDS (2004)), the substance was classified as "Not classified".	FY2009	GHS Classification Guidance by the Japanese Government （March, 2009）
5	Germ cell mutagenicity	Category 2	Warning	H341	P308+P313 P201 P202 P280 P405 P501	Based on positive results in an inhalation rat and a mouse erythrocyte micronucleus test (in vivo somatic cell mutagenicity tests) (SIDS (2004)), the substance was classified into Category 2. As relevant information, from in vitro mutagenicity tests, there are reports of a negative Ames test (SIDS (2004)) and a negative rat liver cell chromosome aberration test (IUCLID (2002)).	FY2009	GHS Classification Guidance by the Japanese Government （March, 2009）
6	Carcinogenicity	Classification not possible	- -	-	-	No data available.	FY2009	GHS Classification Guidance by the Japanese Government （March, 2009）
7	Reproductive toxicity	Classification not possible	- -	-	-	In a combined repeat dose and reproductive/developmental screening rat inhalation test (OECD 422 (GLP)), the estrus cycle was unaffected by exposure, mating performance and fertility indices were similar in all groups. There were no adverse effects upon survival or growth of the offspring in utero or up to day 4 of lactation. Additionally, no evidence of reproductive or developmental toxicity was seen (SIDS (2004)). However, classification was not possible due to lack of data since this screening test did not contain prenatal fetal examination resulting in no data for teratogenicity.	FY2009	GHS Classification Guidance by the Japanese Government （March, 2009）
8	Specific target organ toxicity - Single exposure	Category 3 (Narcotic effects)	Warning	H336	P304+P340 P403+P233 P261 P271 P312 P405 P501	In a rat inhalation test (vapour) (GLP) there were no deaths and macroscopic and microscopic examination at necropsy after exposure was terminated revealed no compound related effects at 61000 ppm/4h. The animals became narcotized but revived within 30 minutes of cessation of exposure (SIDS (2004)). Additionally, there is a report of lethargic as a sign after oral administration to rats (SIDS (2004)). Therefore, the substance was classified into Category 3 (narcotic effects).	FY2009	GHS Classification Guidance by the Japanese Government （March, 2009）
9	Specific target organ toxicity - Repeated exposure	Classification not possible	- -	-	-	In a combined repeat dose and reproductive/developmental test (OECD 422 (GLP)) where rats were exposed via inhalation (vapour) for 28 days, decreased incidence of extramedullary haemopoiesis of the spleen, increased globlet cell hyperplasia in the nasal passages of males and minimal centrilobular hepatocyte hypertrophy in the liver of females were noted at a dose level of 7000 ppm/6h (20 mg/L/6h) (90-day equivalence: 6.25 mg/L/6h) which exceeds the guidance value range of Category 2 (<=1.0 mg/L/6 hr). In the 2000 ppm (5.2 mg/L/6h) (90-day equivalence: 1.6 mg/L/6h) dosed males, a slight increase in severity of myocardial inflammatory heart lesions and cortical/medullary tubular basophilia in the kidneys were observed (SIDS (2004)). Classification was not possible due to lack of data for evidence of effects near the upper limit guidance value range of Category 2.	FY2009	GHS Classification Guidance by the Japanese Government （March, 2009）
10	Aspiration hazard	Classification not possible	- -	-	-	No data available.	FY2009	GHS Classification Guidance by the Japanese Government （March, 2009）

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 2	- -	H401	P273 P501	Classified into Category 2 from its 96h-LC50 = 1.99 mg/L for fish (Rainbow trout) (SIDS, 2004).	FY2009	GHS Classification Guidance by the Japanese Government （March, 2009）
11	Hazardous to the aquatic environment Long term (Chronic)	Category 2	-	H411	P273 P391 P501	Classified into Category 2 since its acute toxicity is Category 2 and it is not rapidly degradable (SIDS, 2004).	FY2009	GHS Classification Guidance by the Japanese Government （March, 2009）
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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