NITE - Chemical Management Field

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

GENERAL INFORMATION

Item	Information
CAS RN	7446-08-4
Chemical Name	Selenium dioxide
Substance ID	m-nite-7446-08-4_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 present in the molecule associated with explosive properties.	FY2014	GHS Classification Guidance for the Japanese Government (FY2013 revised edition (Ver. 1.0))
2	Flammable gases	Not classified (Not applicable)	- -	-	-	Solid (GHS definition)	FY2014	GHS Classification Guidance for the Japanese Government (FY2013 revised edition (Ver. 1.0))
3	Aerosols	Not classified (Not applicable)	- -	-	-	Not aerosol products.	FY2014	GHS Classification Guidance for the Japanese Government (FY2013 revised edition (Ver. 1.0))
4	Oxidizing gases	Not classified (Not applicable)	- -	-	-	Solid (GHS definition)	FY2014	GHS Classification Guidance for the Japanese Government (FY2013 revised edition (Ver. 1.0))
5	Gases under pressure	Not classified (Not applicable)	- -	-	-	Solid (GHS definition)	FY2014	GHS Classification Guidance for the Japanese Government (FY2013 revised edition (Ver. 1.0))
6	Flammable liquids	Not classified (Not applicable)	- -	-	-	Solid (GHS definition)	FY2014	GHS Classification Guidance for the Japanese Government (FY2013 revised edition (Ver. 1.0))
7	Flammable solids	Not classified	- -	-	-	It is not combustible (ICSC (2000)).	FY2014	GHS Classification Guidance for the Japanese Government (FY2013 revised edition (Ver. 1.0))
8	Self-reactive substances and mixtures	Not classified (Not applicable)	- -	-	-	There are no chemical groups present in the molecule associated with explosive or self-reactive properties.	FY2014	GHS Classification Guidance for the Japanese Government (FY2013 revised edition (Ver. 1.0))
9	Pyrophoric liquids	Not classified (Not applicable)	- -	-	-	Solid (GHS definition)	FY2014	GHS Classification Guidance for the Japanese Government (FY2013 revised edition (Ver. 1.0))
10	Pyrophoric solids	Not classified	- -	-	-	It is not combustible (ICSC (2000)).	FY2014	GHS Classification Guidance for the Japanese Government (FY2013 revised edition (Ver. 1.0))
11	Self-heating substances and mixtures	Not classified	- -	-	-	It is not combustible (ICSC (2000)).	FY2014	GHS Classification Guidance for the Japanese Government (FY2013 revised edition (Ver. 1.0))
12	Substances and mixtures which, in contact with water, emit flammable gases	Not classified	- -	-	-	Because data of water solubility of 40 g/100 mL (20 deg C) (ICSC (2000)) were obtained, it is estimated that it does not react vigorously with water.	FY2014	GHS Classification Guidance for the Japanese Government (FY2013 revised edition (Ver. 1.0))
13	Oxidizing liquids	Not classified (Not applicable)	- -	-	-	Solid (GHS definition)	FY2014	GHS Classification Guidance for the Japanese Government (FY2013 revised edition (Ver. 1.0))
14	Oxidizing solids	Classification not possible	- -	-	-	It is an inorganic compound containing oxygen (but not halogen), but the classification is not possible due to no data.	FY2014	GHS Classification Guidance for the Japanese Government (FY2013 revised edition (Ver. 1.0))
15	Organic peroxides	Not classified (Not applicable)	- -	-	-	It is an inorganic compound.	FY2014	GHS Classification Guidance for the Japanese Government (FY2013 revised edition (Ver. 1.0))
16	Corrosive to metals	Classification not possible	- -	-	-	Test methods applicable to solid substances are not available.	FY2014	GHS Classification Guidance for the Japanese Government (FY2013 revised edition (Ver. 1.0))
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	Based on a report of an LD50 value for rats of 48 mg Se/kg (a converted value equivalent to SeO2: 67.5 mg/kg) (ATSDR (2003)), it was classified in Category 3. The LD50 value as selenium was converted to a value equivalent to this substance, and the category was revised.	FY2014	GHS Classification Guidance for the Japanese Government (FY2013 revised edition (Ver. 1.0))
1	Acute toxicity (Dermal)	Classification not possible	- -	-	-	Classification not possible due to lack of data.	FY2014	GHS Classification Guidance for the Japanese Government (FY2013 revised edition (Ver. 1.0))
1	Acute toxicity (Inhalation: Gases)	Not classified (Not applicable)	- -	-	-	Solid (GHS definition)	FY2014	GHS Classification Guidance for the Japanese Government (FY2013 revised edition (Ver. 1.0))
1	Acute toxicity (Inhalation: Vapours)	Not classified (Not applicable)	- -	-	-	Solid (GHS definition)	FY2014	GHS Classification Guidance for the Japanese Government (FY2013 revised edition (Ver. 1.0))
1	Acute toxicity (Inhalation: Dusts and mists)	Classification not possible	- -	-	-	Classification not possible due to lack of data.	FY2014	GHS Classification Guidance for the Japanese Government (FY2013 revised edition (Ver. 1.0))
2	Skin corrosion/irritation	Classification not possible	- -	-	-	There is a description that this substance was irritating in contact with the skin (HSDB (Access on July 2014)). In addition, there is a report that skin irritation was observed by occupational exposure (EHC 58 (1986)). On the other hand, there is a description that this substance (powder form) did not damage the skin, but selenious acid produced by reaction with this substance and water or sweat was irritating (EHC 58 (1986)). However, it was determined that metabolite information wan not used for classification. From the above, it was classified as "Classification not possible."	FY2014	GHS Classification Guidance for the Japanese Government (FY2013 revised edition (Ver. 1.0))
3	Serious eye damage/eye irritation	Category 2	Warning	H319	P305+P351+P338 P337+P313 P264 P280	There is a report of eye irritation by this substance in occupational exposure (EHC 58 (1986), PATTY (6th, 2012)). From the above result, it was classified in Category 2.	FY2014	GHS Classification Guidance for the Japanese Government (FY2013 revised edition (Ver. 1.0))
4	Respiratory sensitization	Classification not possible	- -	-	-	Classification not possible due to lack of data.	FY2014	GHS Classification Guidance for the Japanese Government (FY2013 revised edition (Ver. 1.0))
4	Skin sensitization	Classification not possible	- -	-	-	Classification not possible due to lack of data. Besides, there is a report that allergic rash was observed in occupational exposure to this substance (EHC 58 (1986)), but these data were judged to be insufficient for use in the classification since the details are unknown.	FY2014	GHS Classification Guidance for the Japanese Government (FY2013 revised edition (Ver. 1.0))
5	Germ cell mutagenicity	Classification not possible	- -	-	-	Classification not possible due to lack of data. There are no in vivo data. As for in vitro, it was positive in a bacterial reverse mutation test and a chromosomal aberration test with human leukocytes (ATSDR (2003), Initial Risk Assessment Report (NITE, CERI, NEDO, 2008)).	FY2014	GHS Classification Guidance for the Japanese Government (FY2013 revised edition (Ver. 1.0))
6	Carcinogenicity	Classification not possible	- -	-	-	Since selenium and its compounds were classified in Group 3 by IARC (suppl 7, 1987) and in D by EPA (1991), it was classified as "Classification not possible."	FY2014	GHS Classification Guidance for the Japanese Government (FY2013 revised edition (Ver. 1.0))
7	Reproductive toxicity	Classification not possible	- -	-	-	Classification not possible due to lack of data.	FY2014	GHS Classification Guidance for the Japanese Government (FY2013 revised edition (Ver. 1.0))
8	Specific target organ toxicity - Single exposure	Category 1 (central nervous system, respiratory organs, heart, blood system, kidney)	Danger	H370	P308+P311 P260 P264 P270 P321 P405 P501	This substance is irritating (ATSDR (2003)). In humans, there are reports of chills, fever, headache, burning sensation of the nose, dizziness, dyspnea, bronchial spasms, asphyxiation, persistent bronchitis, pneumonia, shock symptoms including hypotension and elevated pulse rate, acute pulmonary edema, mucosal damage in the oral cavity, esophagus and stomach, nausea, vomiting, stomach pain and hematemesis by inhalation exposure. In oral ingestion, there are reports of hematemesis, hypotension, toxic cardiomyopathy, pulmonary edema, seizures and coma. In the case of suicides by ingestion, congestion of the lung and kidney, diffuse swelling of the heart and cerebral edema were observed at necropsy. The most characteristic finding of those suicide cases was an orange-brown discoloration of the skin and whole viscera, which is considered to be due to the hemolysis and pigmentation related to this substance (ATSDR (2003), PATTY (6th, 2012), Initial Risk Assessment Report (NITE, CERI, NEDO, 2008), HSDB (Access on August 2014)). Besides, ataxia, dyspnea and other neurological symptoms as acute effects of selenium, in addition, severe gastrointestinal disorder, neuropathy, respiratory insufficiency syndrome, myocardial infarction and renal failure by ingestion of selenium at the gram scale are reported (Initial Risk Assessment Report (NITE, CERI, NEDO, 2008), ATSDR (2003)). In experimental animals tests, there is a description that the primary injury sites by acute inhalation exposure to elemental selenium and selenium compounds were the respiratory organs (ATSDR (2003)). From the above, this substance is considered to affect the central nervous system, respiratory organs, heart, hemal system and kidney in humans, and it was classified in Category 1 (central nervous system, respiratory organs, heart, hemal system, kidney).	FY2014	GHS Classification Guidance for the Japanese Government (FY2013 revised edition (Ver. 1.0))
9	Specific target organ toxicity - Repeated exposure	Category 1 (nervous system, respiratory organs), Category 2 (liver)	Danger Warning	H372 H373	P260 P264 P270 P314 P501	On inhalation of selenium dioxide, over half of 62 occupationally exposed workers complained of sleeplessness, loss of appetite or nausea, 26 workers complained of headaches and 3 workers complained of cramp-like pains. Mucosal irritation, conjunctivitis and bronchitis were observed in 9 workers according to the diagnosis (EHC 58 (1986), ATSDR (2003), Initial Risk Assessment Report (NITE, CERI, NEDO, 2008)). In addition, there is a report that rhinitis, nasal bleeding, headaches, loss of weight, irritability and pain in the extremities were observed in workers exposed to a aerosol mix of metallic selenium and this substance for prolonged periods (EHC 58 (1986)). On the other hand, there is no toxicity information by repeated administration of this substance to experimental animals. From the above, based on findings observed in occupational exposures by inhalation in humans, the target organs are considered to be the nervous system, respiratory organs and gastrointestinal tract. However, it was also considered that gastrointestinal symptoms may be indefinite complaints due to irritation of the respiratory organs, etc., and it was considered there is limited objective evidence to determine a specific target organ by exposure to this substance. In addition, it is described in the report on the occupational exposure to selenium dioxide in the opening paragraph that liver dysfunctions were observed in some cases without correlation with blood selenium levels (EHC 58 (1986)). There are no test results for exposure of experimental animals to this substance, and there is little evidence to adopt the "liver" as the target organ. However, it is assumed that this substance also may act like other selenium compounds after taken into the body, so the "liver" was also added to the target organ (category was determined to be "2" because of lack of evidence data in experimental animals) in consideration of consistency with the classification results for other selenium compounds. Therefore, it was classified in Category 1 (nervous system, respiratory organs), Category 2 (liver). Besides, in the previous classification, the "kidney" was adopted as the target organ according to an information source which is not listed in the GHS classification guidance for the Japanese government, but in the data collected for the classification of multiple selenium compounds subject to this survey, there is no information in List 1available. Therefore, it was judged that there is no reason to regard the kidney as a common target organ, therefore, the "kidney" was deleted from the target organ.	FY2014	GHS Classification Guidance for the Japanese Government (FY2013 revised edition (Ver. 1.0))
10	Aspiration hazard	Classification not possible	- -	-	-	Classification not possible due to lack of data.	FY2014	GHS Classification Guidance for the Japanese Government (FY2013 revised edition (Ver. 1.0))

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 72 hours EC50=100microg/L of the algae (Scenedesmus) (AQUIRE, 2003).	FY2006	GHS Classification Manual （10 Feb, 2006）
11	Hazardous to the aquatic environment Long term (Chronic)	Category 1	Warning	H410	P273 P391 P501	Since acute toxicity was Category 1 and it was a metallic compound, and since an underwater action and bio-accumulation were unknown, it was classified into Category 1.	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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